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1.
Int J Geriatr Psychiatry ; 38(4): e5914, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-37083937

RESUMEN

BACKGROUND: The clock drawing test (CDT) and the Mini Mental State Examination (MMSE) are frequently used screening instruments for cognitive impairment, however, the precise contribution of the CDT to the MMSE is largely unknown. METHODS: We studied patients with subjective cognitive impairment (SCI, n = 481), mild cognitive impairment (MCI, n = 628) and Alzheimer's disease (AD, n = 1099). Discrimination between patients was examined with multiple logistic regression, adjusted for age, sex, and education. Four groups were constructed based on a normal/abnormal MMSE (cut-off <24/30) versus normal/abnormal CDT (cut-off ≤2/3). Visually rated medial temporal lobe atrophy (MTA) on CT was used as parameter of neurodegeneration. RESULTS: The CDT significantly contributed to the MMSE in discriminating SCI from both MCI and AD patients. Our four group analyses showed that of those patients with a normal MMSE and incorrectly classified as SCI, an abnormal CDT could significantly identify 10.0% as MCI and 13.2% as AD. Among those with an abnormal MMSE, the percentage AD patients shifted from 53.1% to 82.1% due to an abnormal CDT. Presence of an abnormal CDT was significantly related to MTA increase, regardless of the MMSE score. CONCLUSION: The CDT is an important additional screening tool to the MMSE. An abnormal CDT with a normal MMSE is an indicator for cognitive impairment. An abnormal CDT in combination with an abnormal MMSE can be considered as an indicator of disease progression.


Asunto(s)
Enfermedad de Alzheimer , Disfunción Cognitiva , Humanos , Disfunción Cognitiva/diagnóstico , Enfermedad de Alzheimer/diagnóstico , Enfermedad de Alzheimer/psicología , Pruebas Neuropsicológicas , Escolaridad , Pruebas de Estado Mental y Demencia
2.
Crit Care ; 14(3): R81, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-20444270

RESUMEN

INTRODUCTION: Effects of systemic inflammation on cerebral function are not clear, as both inflammation-induced encephalopathy as well as stress-hormone mediated alertness have been described. METHODS: Experimental endotoxemia (2 ng/kg Escherichia coli lipopolysaccharide [LPS]) was induced in 15 subjects, whereas 10 served as controls. Cytokines (TNF-alpha, IL-6, IL1-RA and IL-10), cortisol, brain specific proteins (BSP), electroencephalography (EEG) and cognitive function tests (CFTs) were determined. RESULTS: Following LPS infusion, circulating pro- and anti-inflammatory cytokines, and cortisol increased (P < 0.0001). BSP changes stayed within the normal range, in which neuron specific enolase (NSE) and S100-beta changed significantly. Except in one subject with a mild encephalopathic episode, without cognitive dysfunction, endotoxemia induced no clinically relevant EEG changes. Quantitative EEG analysis showed a higher state of alertness detected by changes in the central region, and peak frequency in the occipital region. Improved CFTs during endotoxemia was found to be due to a practice effect as CFTs improved to the same extent in the reference group. Cortisol significantly correlated with a higher state of alertness detected on the EEG. Increased IL-10 and the decreased NSE both correlated with improvement of working memory and with psychomotor speed capacity. No other significant correlations between cytokines, cortisol, EEG, CFT and BSP were found. CONCLUSIONS: Short-term systemic inflammation does not provoke or explain the occurrence of septic encephalopathy, but primarily results in an inflammation-mediated increase in cortisol and alertness. TRIAL REGISTRATION: NCT00513110.


Asunto(s)
Encéfalo/inmunología , Endotoxemia/inmunología , Adulto , Encéfalo/metabolismo , Encefalopatías/inmunología , Ensayos Clínicos como Asunto , Cognición/fisiología , Citocinas/sangre , Citocinas/efectos de los fármacos , Electroencefalografía , Endotoxemia/complicaciones , Escherichia coli/inmunología , Escherichia coli/metabolismo , Escherichia coli/patogenicidad , Humanos , Hidrocortisona/sangre , Inflamación , Lipopolisacáridos/administración & dosificación , Lipopolisacáridos/inmunología , Lipopolisacáridos/metabolismo , Masculino , Adulto Joven
3.
Arch Phys Med Rehabil ; 90(3): 435-9, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19254608

RESUMEN

OBJECTIVES: Recently, it has become clear that neuralgic amyotrophy (NA; idiopathic and hereditary brachial plexus neuropathy) has a less optimistic prognosis than usually assumed. To optimize treatment and management of these patients, one needs to know the residual symptoms and impairments they suffer. Therefore, the objective of this study was to describe the prevalence of pain, psychologic symptoms, fatigue, functional status, and quality of life in patients with NA. SETTING: Neurology outpatient department of an academic teaching hospital. PARTICIPANTS: NA patients (N=89) were studied, and clinical details were recorded. Self-report data were on average collected 2 years after the onset of the last NA episode. MAIN OUTCOME MEASURES: Pain was assessed with the McGill Pain Questionnaire, fatigue with the Checklist Individual Strength, and psychologic distress with the Symptom Checklist 90. Functional status and handicap were assessed with the modified Rankin Scale and Medical Outcomes Study 36-Item Short-Form Health Survey. RESULTS: Pain was usually localized in the right shoulder and upper arm, matching the clinical predilection site for paresis in NA. About a quarter to a third of the patients reported significant long-term pain and fatigue, and half to two thirds still experienced impairments in daily life. Over one third of the individual patients suffered from severe fatigue. The group did not fulfill the criteria of chronic fatigue or major psychologic distress. There was no correlation of pain or fatigue with the level of residual paresis on a Medical Research Council scale, but patients with a comorbid condition fared worse than patients without. CONCLUSIONS: A significant number of NA patients suffer from persistent pain and fatigue, leading to impairment. Symptoms were not correlated with psychologic distress. This makes it likely that they are caused by residual shoulder or arm dysfunction but not as part of a chronic pain or fatigue syndrome in these patients.


Asunto(s)
Neuritis del Plexo Braquial/epidemiología , Fatiga/epidemiología , Dolor/epidemiología , Calidad de Vida , Actividades Cotidianas , Adulto , Anciano , Enfermedad Crónica , Comorbilidad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Países Bajos/epidemiología , Vigilancia de la Población , Prevalencia , Distribución por Sexo , Factores Sexuales , Estrés Psicológico/epidemiología , Desempleo/estadística & datos numéricos
4.
Brain Inj ; 23(4): 345-52, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19330596

RESUMEN

PRIMARY OBJECTIVE: To investigate how the type of stimulus (pictures or words) and the method of reproduction (free recall or recognition after a short or a long delay) affect the sensitivity and specificity of a 3-item memory test in the assessment of post traumatic amnesia (PTA). METHODS: Daily testing was performed in 64 consecutively admitted traumatic brain injured patients, 22 orthopedically injured patients and 26 healthy controls until criteria for resolution of PTA were reached. Subjects were randomly assigned to a test with visual or verbal stimuli. Short delay reproduction was tested after an interval of 3-5 minutes, long delay reproduction was tested after 24 hours. Sensitivity and specificity were calculated over the first 4 test days. RESULTS: The 3-word test showed higher sensitivity than the 3-picture test, while specificity of the two tests was equally high. Free recall was a more effortful task than recognition for both patients and controls. In patients, a longer delay between registration and recall resulted in a significant decrease in the number of items reproduced. CONCLUSIONS: Presence of PTA is best assessed with a memory test that incorporates the free recall of words after a long delay.


Asunto(s)
Amnesia/diagnóstico , Recuerdo Mental , Pruebas Neuropsicológicas/normas , Trastornos por Estrés Postraumático/diagnóstico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Amnesia/etiología , Huesos/lesiones , Lesiones Encefálicas/complicaciones , Estudios de Casos y Controles , Femenino , Humanos , Masculino , Persona de Mediana Edad , Países Bajos , Sensibilidad y Especificidad , Trastornos por Estrés Postraumático/etiología , Adulto Joven
5.
Cortex ; 110: 150-156, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-29739623

RESUMEN

Cognitive changes after minor stroke or TIA have been reported, with studies describing a 'vascular' cognitive profile with spared episodic memory. Still, many patients also report memory complaints. Studies using long-term forgetting paradigms have detected memory impairment after prolonged intervals in contrast to standard delayed testing in other patient groups. This study examined whether accelerated long-term forgetting (ALF) is present in patients with minor stroke or TIA by comparing one-week delayed recall and recognition with the performance of a healthy control group. Results revealed that the patients' performance after one week was worse than the controls, in the absence of an impairment after a short delay. Patients did, however, not report more memory worries than controls. Possibly, reduced effort, attention or mnemonic strategies may contribute to subtle consolidation problems, which go undetected in daily functioning.


Asunto(s)
Ataque Isquémico Transitorio/fisiopatología , Trastornos de la Memoria/fisiopatología , Accidente Cerebrovascular/fisiopatología , Adulto , Anciano , Atención/fisiología , Femenino , Humanos , Ataque Isquémico Transitorio/diagnóstico , Masculino , Memoria/fisiología , Trastornos de la Memoria/diagnóstico , Trastornos Mentales/diagnóstico , Trastornos Mentales/fisiopatología , Recuerdo Mental/fisiología , Persona de Mediana Edad , Reconocimiento en Psicología/fisiología , Accidente Cerebrovascular/diagnóstico
6.
J Interv Card Electrophysiol ; 56(2): 191-197, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30564973

RESUMEN

PURPOSE: Clinically observed discrepancies between electrocardiogram findings and subjective report of symptoms related to atrial fibrillation (AF) often remain unexplained. One could hypothesize that after a technically successful ablation, preoperative panic behavior might affect the report of AF-related symptoms. However, research on comorbid panic behavior in patients with AF is limited. METHODS: In this observational prospective cohort study, we investigated psychological characteristics, in particular the prevalence of panic features, among 112 patients with AF and its possible influence on experienced outcome of subsequent ablation treatment. RESULTS: Twelve percent of the AF patients (n = 12) were pre-operatively characterized by panic features. This group experienced higher levels of distress and more limitations in daily life compared to AF patients without panic features, but was not characterized by higher levels of neuroticism. However, AF-ablation resulted in a similar reduction of experienced limitations in daily functioning and levels of distress in both groups. CONCLUSION: Patients with panic features experience more distress and more limitations in daily life from AF, but these complaints are reduced by AF ablation in a similar rate as in patients without panic features. Additional psychological therapy is suggested as a method to further reduce subjective AF disease burden in these patients.


Asunto(s)
Fibrilación Atrial/psicología , Fibrilación Atrial/cirugía , Venas Pulmonares/cirugía , Estrés Psicológico/complicaciones , Actividades Cotidianas , Adulto , Anciano , Ablación por Catéter , Electrocardiografía , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Encuestas y Cuestionarios
7.
Hum Brain Mapp ; 29(9): 1068-79, 2008 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-17948888

RESUMEN

Remembering complex, multidimensional information typically requires strategic memory retrieval, during which information is structured, for instance by spatial- or temporal associations. Although brain regions involved in strategic memory retrieval in general have been identified, differences in retrieval operations related to distinct retrieval strategies are not well-understood. Thus, our aim was to identify brain regions whose activity is differentially involved in spatial-associative and temporal-associative retrieval. First, we showed that our behavioral paradigm probing memory for a set of object-location associations promoted the use of a spatial-associative structure following an encoding condition that provided multiple associations to neighboring objects (spatial-associative condition) and the use of a temporal-associative structure following another study condition that provided predominantly temporal associations between sequentially presented items (temporal-associative condition). Next, we used an adapted version of this paradigm for functional MRI, where we contrasted brain activity related to the recall of object-location associations that were either encoded in the spatial- or the temporal-associative condition. In addition to brain regions generally involved in recall, we found that activity in higher-order visual regions, including the fusiform gyrus, the lingual gyrus, and the cuneus, was relatively enhanced when subjects used a spatial-associative structure for retrieval. In contrast, activity in the globus pallidus and the thalamus was relatively enhanced when subjects used a temporal-associative structure for retrieval. In conclusion, we provide evidence for differential involvement of these brain regions related to different types of strategic memory retrieval and the neural structures described play a role in either spatial-associative or temporal-associative memory retrieval.


Asunto(s)
Recuerdo Mental/fisiología , Red Nerviosa/fisiología , Estimulación Luminosa/métodos , Percepción Espacial/fisiología , Percepción del Tiempo/fisiología , Adulto , Femenino , Humanos , Masculino , Memoria/fisiología
8.
Health Psychol ; 37(6): 530-543, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29781654

RESUMEN

OBJECTIVE: Severe fatigue is highly prevalent in various chronic diseases. Disease-specific fatigue models have been developed, but it is possible that fatigue-related factors in these models are similar across diseases. The purpose of the current study was to determine the amount of variance in fatigue severity explained by: (a) the specific disease, (b) factors associated with fatigue across different chronic diseases (transdiagnostic factors), and (c) the interactions between these factors and specific diseases. METHOD: Data from 15 studies that included 1696 patients with common chronic diseases and disorders that cause long-term disabilities were analyzed. Linear regression analysis with the generalized least-squares technique was used to determine fatigue-related factors associated with fatigue severity, that is, demographic variables, health-related symptoms and psychosocial variables. RESULTS: Type of chronic disease explained 11% of the variance noted in fatigue severity. The explained variance increased to 55% when the transdiagnostic factors were added to the model. These factors were female sex, age, motivational and concentration problems, pain, sleep disturbances, physical functioning, reduced activity and lower self-efficacy concerning fatigue. The predicted variance increased to 61% when interaction terms were added. Analysis of the interactions revealed that the relationship between fatigue severity and relevant predictors mainly differed in strength, not in direction. CONCLUSIONS: Fatigue severity can largely be explained by transdiagnostic factors; the associations vary between chronic diseases in strength and significance. This suggests that severely fatigued patients with different chronic diseases can probably benefit from a transdiagnostic fatigue-approach which focuses on individual patient needs rather than a specific disease. (PsycINFO Database Record


Asunto(s)
Enfermedad Crónica/psicología , Fatiga/psicología , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad
9.
J Psychosom Res ; 63(6): 637-45, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-18061755

RESUMEN

OBJECTIVE: To compare nonreferred, emergency department (ED)-admitted mild traumatic brain injury (MTBI) patients with and without self-reported cognitive complaints on (1) demographic variables and injury characteristics; (2) neuropsychological test performance; (3) 12-day self-monitoring of perceived cognitive problems; and (4) emotional distress, physical functioning, and personality. METHODS: (Neuro)psychological assessment was carried out 6 months post-injury in 79 patients out of a cohort of 618 consecutive MTBI patients aged 18-60, who attended the ED of our level I trauma centre. Cognitive complaints were assessed with the Rivermead Postconcussional Symptoms Questionnaire (RPSQ). In addition, patients monitored concentration problems and forgetfulness during 12 consecutive days. RESULTS: Self-reported cognitive complaints were reported by 39% of the patients. These complaints were strongly related to lower educational levels, emotional distress, personality, and poorer physical functioning (especially fatigue) but not to injury characteristics. Severity of self-reported cognitive complaints was neither associated with the patients' daily observations of cognitive problems nor with outcome on a range of neuropsychological tests. CONCLUSION: Self-reported cognitive complaints were more strongly related to premorbid traits and physical and emotional state factors than to actual cognitive impairments. In line with previous work, this suggests that treatment of emotional distress and fatigue may also reduce cognitive complaints. Cognitive outcome assessment of symptomatic MTBI patients should not be restricted to checklist ratings only, but also include a (neuro)psychological screening. In addition, daily monitoring of complaints is a useful method to gather information about the frequency and pattern of cognitive problems in daily life.


Asunto(s)
Lesiones Encefálicas/complicaciones , Trastornos del Conocimiento/etiología , Adolescente , Adulto , Anciano , Lesiones Encefálicas/fisiopatología , Lesiones Encefálicas/psicología , Trastornos del Conocimiento/diagnóstico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Trastornos del Humor/diagnóstico , Trastornos del Humor/etiología , Pruebas Neuropsicológicas , Índice de Severidad de la Enfermedad , Encuestas y Cuestionarios
10.
Parkinsonism Relat Disord ; 13(3): 170-3, 2007 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-17107822

RESUMEN

INTRODUCTION: Previous studies of writer's cramp have detected cerebral sensorimotor abnormalities in this disorder and, more specifically, a reduced striatal D2-binding as assessed by [(123)I]IBZM SPECT. However, empirical data were lacking about the influence of effective biofeedback-based sensorimotor training on D2 receptor binding. METHODS: To determine whether there is a restoration of D2-binding after successful sensorimotor treatment, pre- and posttreatment SPECTs were compared in five patients with writer's cramp and correlated with improvement in handwriting. RESULTS: After treatment, the clinical and electromyographic picture appeared substantially improved connected with a significant increase in D2-binding to nearly normal levels similar to normative data in age/sex-matched healthy subjects. CONCLUSION: The current study supported the view that writer's cramp results from a plastic adaptation of a rectifiable nigrostriatal dopaminergic system and that effective sensorimotor training leads to increased efficacy of striatal dopaminergic transmission.


Asunto(s)
Biorretroalimentación Psicológica/métodos , Cuerpo Estriado/efectos de los fármacos , Trastornos Distónicos/terapia , Escritura Manual , Receptores de Dopamina D2/metabolismo , Adulto , Benzamidas/farmacocinética , Cuerpo Estriado/diagnóstico por imagen , Antagonistas de Dopamina/farmacocinética , Trastornos Distónicos/diagnóstico por imagen , Trastornos Distónicos/metabolismo , Electromiografía/métodos , Humanos , Masculino , Persona de Mediana Edad , Pirrolidinas/farmacocinética , Tomografía Computarizada de Emisión de Fotón Único/métodos
11.
J Neurotrauma ; 23(10): 1561-9, 2006 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17020490

RESUMEN

Many patients with mild traumatic brain injury (MTBI) concurrently sustain extracranial injuries; however, little is known about the impact of these additional injuries on outcome. We assessed the impact of additional injuries on the severity of postconcussional symptoms (PCS) and functional outcome 6 months post-injury. A questionnaire (including the Rivermead Post-Concussion Questionnaire and SF-36) was sent to consecutive MTBI patients (hospital admission Glasgow Coma Score 13-15; age range 18-60 years) admitted to the emergency department of a level-I trauma center, and, to serve as a baseline for PCS, a control group of minor-injury patients (ankle or wrist distortion). Of the 299 MTBI respondents (response rate 52%), 89 had suffered additional injuries (mean Injury Severity Score [ISS] of 14.5 +/- 7.4). After 6 months, 44% of the patients with additional injuries were still in some form of treatment, compared to 14% of patients with isolated MTBI and 5% of the controls. Compared to patients with isolated injury, MTBI patients with additional injuries had resumed work less frequently and reported more limitations in physical functioning. Overall, they did not report higher levels of PCS, despite somewhat more severe head injury. Regardless of the presence of additional injuries, patients that were still in treatment reported significantly more severe PCS, with highest rates in patients with isolated MTBI. In conclusion, many patients with additional extracranial injuries are still in the process of recovery at 6 months after injury. However, despite more severe impact to the head and inferior functional outcomes, these patients do not report more severe PCS.


Asunto(s)
Lesiones Encefálicas/fisiopatología , Lesiones Encefálicas/psicología , Traumatismo Múltiple/complicaciones , Adulto , Lesiones Encefálicas/complicaciones , Estudios de Casos y Controles , Femenino , Estudios de Seguimiento , Estado de Salud , Humanos , Masculino , Persona de Mediana Edad , Traumatismo Múltiple/fisiopatología , Traumatismo Múltiple/psicología , Evaluación de Resultado en la Atención de Salud , Recuperación de la Función , Índices de Gravedad del Trauma
12.
Front Psychol ; 7: 605, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27199838

RESUMEN

It has been suggested that the memory complaints of patients who are not impaired on formal memory tests may reflect accelerated forgetting. We examined this hypothesis by comparing the 1-week delayed recall and recognition test performance of outpatients who were referred for neuropsychological assessment and who had normal memory performance during standard memory assessment with that of a non-patient control group. Both groups performed equally in verbal learning and delayed recall. However, after 1 week, the patients performed worse than controls on both recall and recognition tests. Although subjective memory ability predicted short-term memory function in patients, it did not predict long-term delayed forgetting rates in either the patients or controls. Thus, long-term delayed recall and recognition intervals provided no additional value to explain poor subjective memory ability in the absence of objective memory deficits.

13.
Brain ; 127(Pt 9): 1948-57, 2004 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-15240435

RESUMEN

Chronic fatigue syndrome (CFS) is characterized by a debilitating fatigue of unknown aetiology. Patients who suffer from CFS report a variety of physical complaints as well as neuropsychological complaints. Therefore, it is conceivable that the CNS plays a role in the pathophysiology of CFS. The purpose of this study was to investigate neural correlates of CFS, and specifically whether there exists a linkage between disturbances in the motor system and CFS. We measured behavioural performance and cerebral activity using rapid event-related functional MRI in 16 CFS patients and 16 matched healthy controls while they were engaged in a motor imagery task and a control visual imagery task. CFS patients were considerably slower on performance of both tasks, but the increase in reaction time with increasing task load was similar between the groups. Both groups used largely overlapping neural resources. However, during the motor imagery task, CFS patients evoked stronger responses in visually related structures. Furthermore, there was a marked between-groups difference during erroneous performance. In both groups, dorsal anterior cingulate cortex was specifically activated during error trials. Conversely, ventral anterior cingulate cortex was active when healthy controls made an error, but remained inactive when CFS patients made an error. Our results support the notion that CFS may be associated with dysfunctional motor planning. Furthermore, the between-groups differences observed during erroneous performance point to motivational disturbances as a crucial component of CFS.


Asunto(s)
Encéfalo/fisiopatología , Síndrome de Fatiga Crónica/fisiopatología , Imagen por Resonancia Magnética/métodos , Adulto , Núcleo Caudado/fisiopatología , Cerebelo/fisiopatología , Corteza Cerebral/fisiopatología , Femenino , Humanos , Desempeño Psicomotor/fisiología , Tiempo de Reacción , Percepción Visual/fisiología
14.
Front Psychol ; 6: 752, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26106343

RESUMEN

The main focus of this review was to evaluate whether long-term forgetting rates (delayed tests, days, to weeks, after initial learning) are more sensitive measures than standard delayed recall measures to detect memory problems in various patient groups. It has been suggested that accelerated forgetting might be characteristic for epilepsy patients, but little research has been performed in other populations. Here, we identified eleven studies in a wide range of brain injured patient groups, whose long-term forgetting patterns were compared to those of healthy controls. Signs of accelerated forgetting were found in three studies. The results of eight studies showed normal forgetting over time for the patient groups. However, most of the studies used only a recognition procedure, after optimizing initial learning. Based on these results, we recommend the use of a combined recall and recognition procedure to examine accelerated forgetting and we discuss the relevance of standard and optimized learning procedures in clinical practice.

15.
J Clin Endocrinol Metab ; 88(11): 5462-7, 2003 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-14602790

RESUMEN

Hypoglycemia unawareness is thought to be the consequence of recurrent hypoglycemia, yet the underlying mechanism is still incompletely understood. The aim of the present study was to determine the role of antecedent elevated adrenaline in the pathogenesis of hypoglycemia unawareness. Sixteen healthy volunteers (eight of either sex) participated in two experiments, performed in random order and at least 3 wk apart. During the morning, three consecutive doses of 0.04, 0.06, and 0.08 microg.kg(-1).min(-1) of adrenaline or matching placebo (normal saline) were infused for the total duration of 1 h. Three hours later, a hyperinsulinemic (360 pmol.m(-2).min(-1)) two-step hypoglycemic (5.0-3.5-2.5 mmol.liter(-1)) clamp study was performed. During hypoglycemia, hypoglycemic symptoms, counterregulatory hormones, cardiovascular responses, and cognitive function were monitored. Hypoglycemia induced similar responses of autonomic and neuroglycopenic symptoms, counterregulatory hormones, and lengthening in reaction time on the choice reaction time task, irrespective of antecedent infusions. However, prior adrenaline was associated with higher exogenous glucose requirements at hypoglycemic nadir (10.1 +/- 1.3 vs. 7.3 +/- 1.3 micromol.kg(-1).min(-1), P = 0.017), an attenuated hypoglycemia-induced fall in blood pressure (mean arterial pressure, -13 +/- 2 vs. -8 +/- 2 mm Hg, P = 0.006), and preserved cognitive function as assessed by the symbol digit test during hypoglycemia, when compared with prior placebo. We conclude that elevated adrenaline attenuates the responsiveness to, but not the release of counterregulatory hormones during subsequent hypoglycemia. As such, adrenaline's role in the development of hypoglycemia unawareness is limited.


Asunto(s)
Agonistas Adrenérgicos/administración & dosificación , Epinefrina/administración & dosificación , Hipoglucemia/fisiopatología , Hipoglucemia/psicología , Percepción/fisiología , Agonistas Adrenérgicos/metabolismo , Adulto , Concienciación/fisiología , Glucemia , Regulación hacia Abajo/efectos de los fármacos , Epinefrina/metabolismo , Femenino , Humanos , Hiperinsulinismo/metabolismo , Hiperinsulinismo/fisiopatología , Hipoglucemia/metabolismo , Insulina/sangre , Masculino
16.
Neuropsychologia ; 42(8): 1071-8, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15093146

RESUMEN

UNLABELLED: Patients with Parkinson's disease (PD) have difficulty in processing learning tasks that lack external guidelines and, consequently, necessitate the subjects to generate their own problem-solving strategy. While the contribution of striatal dopaminergic deficiency to PD-specific motor symptoms is well established, its role in the PD-characteristic deviant learning style remains unclear. The aim of this study was to assess the relation between striatal dopamine activity as revealed by single photon emission computed tomography (SPECT) with (123)I-FP-CIT, a ligand for the dopamine transporter (DaT), and type of learning strategy, as identified by the California Verbal Learning Task (CVLT) in 19 patients with probable PD. The results showed a robust inverse correlation between striatal dopamine DaT binding and the externally guided, serial learning strategy: the lower the DaT in caudate nucleus as well as in putamen, the more the patient group appeared to rely on externally structured learning. Additionally, a significant positive correlation was found between caudatal DaT activity and the internally generated, semantic learning strategy. Unlike these strategic learning characteristics, IQ equivalent and recall total score appeared to vary independently from striatal DaT availability. CONCLUSION: our findings provide direct evidence that striatal dopaminergic activity is specifically involved in the regulation of strategic learning processes.


Asunto(s)
Cuerpo Estriado/diagnóstico por imagen , Dopamina/metabolismo , Procesamiento de Imagen Asistido por Computador , Discapacidades para el Aprendizaje/diagnóstico por imagen , Glicoproteínas de Membrana , Enfermedad de Parkinson/diagnóstico por imagen , Solución de Problemas/fisiología , Tomografía Computarizada de Emisión de Fotón Único , Adulto , Anciano , Núcleo Caudado/diagnóstico por imagen , Proteínas de Transporte de Dopamina a través de la Membrana Plasmática , Femenino , Humanos , Masculino , Proteínas de Transporte de Membrana/metabolismo , Persona de Mediana Edad , Proteínas del Tejido Nervioso/metabolismo , Pruebas Neuropsicológicas , Putamen/diagnóstico por imagen , Valores de Referencia , Semántica , Aprendizaje Verbal/fisiología
17.
J Psychosom Res ; 53(3): 749-53, 2002 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-12217448

RESUMEN

OBJECTIVE: To describe the course of fatigue in chronic fatigue syndrome (CFS) patients with a relatively short duration of complaints and to test which psychosocial factors predict spontaneous improvement 1 year later. METHODS: Seventy-nine patients with a complaint duration of less than 2 years were tested at baseline and 78 of the same group at 1-year follow-up. During this time period, no systematic intervention took place. Self-reported improvement and fatigue severity were the main outcome measures. RESULTS: Forty-six percent (95% confidence intervals, 95CI = 35-58%) of the patients with a short illness duration reported to be improved. This was a significantly (chi(2) = 20.3, P < .001) higher percentage compared to the 20% (95CI = 15-26%) self-reported improvement in a previously published natural-course study among 246 CFS patients with a longer illness duration. Persistence of complaints after 1-year follow-up was associated with high baseline levels of experienced concentration problems, less strong psychosocial causal explanations for the complaints, and higher levels of the experienced lack of social support. Baseline fatigue severity predicted fatigue severity at follow-up. CONCLUSION: The results showed that CFS patients with a relatively short duration of complaints had a more favourable outcome compared to patients with a long illness duration. The data also indicated that complete recovery only occurred in patients with a complaint duration of less than 15 months. This finding has important implications, since it suggests that after such a time period spontaneous recovery hardly occurs.


Asunto(s)
Síndrome de Fatiga Crónica/patología , Síndrome de Fatiga Crónica/psicología , Fatiga/clasificación , Adolescente , Adulto , Femenino , Estudios de Seguimiento , Predicción , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Índice de Severidad de la Enfermedad , Apoyo Social , Factores de Tiempo , Resultado del Tratamiento
18.
J Psychosom Res ; 75(3): 242-8, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23972413

RESUMEN

OBJECTIVE: A subgroup of patients with Chronic Fatigue Syndrome (CFS) has cognitive impairments, reflected by deviant neuropsychological test performance. However, abnormal test scores can also be caused by suboptimal effort. We hypothesized that worse neuropsychological test performance and underperformance were related to each other and to a smaller reduction in fatigue, functional impairments, physical limitations and higher dropout rates following cognitive behavior therapy (CBT) for CFS. METHODS: Data were drawn from a previous trial, in which CFS patients were randomized to two conditions; 1) guided self-instruction and additional CBT (n=84) or 2) waiting period followed by regular CBT for CFS (n=85). Underperformance was assessed using the Amsterdam Short Term Memory Test (<84). To test neuropsychological test performance, the Symbol Digit Modalities Task, a simple reaction time task and a choice reaction time task were used. Interaction effects were determined between underperformance and neuropsychological test performance on therapy outcomes. RESULTS: Underperformance was associated to worse neuropsychological test performance, but there were no significant interaction effects of these two factors by therapy on fatigue severity, functional impairments and physical limitations, but there was a significant main effect of underperformance on functional impairments, physical limitations and dropout rates. CONCLUSION: Underperformance or neuropsychological test performance was not related to the change in fatigue, functional impairments, and physical limitations following CBT for CFS. However, underperforming patients did drop out more often. Therapists should pay attention to beliefs and behavioral or environmental factors that might maintain underperformance and increase the risk of dropout.


Asunto(s)
Atención , Terapia Cognitivo-Conductual , Síndrome de Fatiga Crónica/terapia , Memoria a Corto Plazo , Pruebas Neuropsicológicas , Adulto , Síndrome de Fatiga Crónica/psicología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Tiempo de Reacción , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
19.
Clin Neuropsychol ; 25(2): 244-68, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21253959

RESUMEN

The expression of memory worries and the self-reporting of daily forgetfulness easily spark discussion among sufferers and their family or friends about what is normal or abnormal forgetfulness. One way to investigate whether the reporting of forgetfulness might be excessive is to use a standardized memory questionnaire--for instance, the Multifactorial Memory Questionnaire (MMQ). The MMQ measures worries, daily forgetfulness, and memory strategy use. In this study we present a psychometric evaluation of the Dutch translation of the MMQ and provide normative data to determine the significance of individual differences in subtest scores. In addition, clinical examples are given of the use and interpretation of percentile norms and single-case statistics.


Asunto(s)
Trastornos de la Memoria/diagnóstico , Trastornos de la Memoria/psicología , Psicometría/métodos , Autoinforme , Encuestas y Cuestionarios , Traducciones , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Factores Sexuales , Adulto Joven
20.
J Psychosom Obstet Gynaecol ; 30(1): 58-64, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19308784

RESUMEN

BACKGROUND: Pre-eclampsia and eclampsia relate to cerebral damage. Memory and concentration problems are frequently reported after these pregnancy-related vascular complications. We tested the hypothesis that in formerly pre-eclamptic women cognitive functioning is impaired as compared with healthy parous controls. METHODS: Women with a recent history of pre-term pre-eclampsia (PPE; n = 47), term pre-eclampsia (TPE; N = 18), pre-term birth (PBI; n = 32) or an uneventful pregnancy (UPR; n = 72) completed a set of questionnaires, measuring cognitive problems, PTSD, depression, anxiety and fatigue. In addition, in PPE and UPR participants we tested neuropsychological performance. RESULTS: PBI is related to higher levels of post-traumatic distress symptoms, which in turn diminished the neuropsychological test performance of PPE women. Nonetheless, women in the PPE and TPE groups did not report more cognitive problems than women in the PBI and UPR groups, but PPE raised the need for psychosocial cared. CONCLUSIONS: Cognitive complaints are common amongst young mothers. When tested, only those with psychological co-morbidity have neuropsychological impairment.


Asunto(s)
Trastornos del Conocimiento/epidemiología , Preeclampsia/epidemiología , Adulto , Trastornos de Ansiedad/diagnóstico , Trastornos de Ansiedad/epidemiología , Trastornos del Conocimiento/diagnóstico , Trastorno Depresivo Mayor/diagnóstico , Trastorno Depresivo Mayor/epidemiología , Manual Diagnóstico y Estadístico de los Trastornos Mentales , Fatiga/diagnóstico , Fatiga/epidemiología , Femenino , Humanos , Pruebas Neuropsicológicas , Embarazo , Complicaciones del Embarazo/epidemiología , Índice de Severidad de la Enfermedad , Trastornos por Estrés Postraumático/diagnóstico , Trastornos por Estrés Postraumático/epidemiología , Encuestas y Cuestionarios
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