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1.
Sci Rep ; 14(1): 11264, 2024 05 17.
Article in English | MEDLINE | ID: mdl-38760498

ABSTRACT

Dialectical behavior therapy (DBT) is widely acknowledged as an effective treatment for individuals with borderline personality disorder (BPD). However, the optimal treatment duration within DBT remains a topic of investigation. This retrospective, naturalistic non-randomized study aimed to compare the efficacy of 8 week and 12 week DBT interventions with equivalent content, focusing on the change of BPD-specific symptomatology as the primary outcome and depressive symptoms as the secondary outcome. Overall, 175 patients who participated in DBT and received either 8 week or 12 week intervention were included in the analysis. Routine inpatient treatment was adapted from standard DBT with the modules: skill training, interpersonal skills, dealing with feelings, and mindfulness. Measurements were taken at baseline, mid-point, and endpoint. The borderline symptom list-23 (BSL-23) was used for the assessment of borderline-specific symptoms, while the Beck depression inventory-II (BDI-II) was used for the assessment of depressive symptoms. Statistical analysis was conducted using linear mixed models. Effect sizes were calculated for both measures. The results of the analysis indicated an improvement in both groups over time. Effect sizes were d = 1.29 for BSL-23 and d = 1.79 for BDI-II in the 8 week group, and d = 1.16 for BSL-23 and d = 1.58 for BDI-II in the 12 week group. However, there were no differences in the change of BPD-specific symptoms or the severity of depressive symptoms between the 8 week and 12 week treatment duration groups. Based on these findings, shorter treatment durations, like 8 weeks, could be a viable alternative, offering comparable therapeutic benefits, potential cost reduction, and improved accessibility. However, further research is needed to explore factors influencing treatment outcomes and evaluate the long-term effects of different treatment durations in DBT for BPD.Trial registration: drks.de (DRKS00030939) registered 19/12/2022.


Subject(s)
Borderline Personality Disorder , Dialectical Behavior Therapy , Inpatients , Humans , Borderline Personality Disorder/therapy , Borderline Personality Disorder/psychology , Female , Adult , Male , Dialectical Behavior Therapy/methods , Retrospective Studies , Treatment Outcome , Young Adult , Depression/therapy , Middle Aged , Behavior Therapy/methods
2.
Eur Arch Psychiatry Clin Neurosci ; 274(1): 87-96, 2024 Feb.
Article in English | MEDLINE | ID: mdl-37710135

ABSTRACT

Specialized psychotherapeutic treatments like dialectical behavioral therapy (DBT) are recommended as first treatment for borderline personality disorder (BPD). In recent years, studies have emerged that focus on repetitive transcranial magnetic stimulation (rTMS) in BPD. Both have independently demonstrated efficacy in the treatment of BPD. Intermitted theta burst stimulation (iTBS), a modified design of rTMS, is thought to increase the excitability of neurons and could be a supplement to psychotherapy in addition to being a standalone treatment. However, no studies to date have investigated the combination of DBT and rTMS/iTBS. This study protocol describes the methods and design of a randomized, single-blinded, sham-controlled clinical pilot study in which BPD patients will be randomly assigned to either iTBS or sham during four consecutive weeks (20 sessions in total) in addition to standardized DBT treatment. The stimulation will focus on the unilateral stimulation of the left dorsolateral prefrontal cortex (DLPFC), which plays an important role in the control of impulsivity and risk-taking. Primary outcome is the difference in borderline symptomatology, while secondary target criteria are depressive symptoms, general functional level, impulsivity and self-compassion. Statistical analysis of therapy response will be conducted by Mixed Model Repeated Measurement using a 2 × 2-factorial between-subjects design with the between-subject factor stimulation (TMS vs. Sham) and the within-subject factor time (T0 vs. T1). Furthermore, structural magnetic resonance imaging (MRI) will be conducted and analyzed. The study will provide evidence and insight on whether iTBS has an enhancing effect as add-on to DBT in BPD.Trial registration: drks.de (DRKS00020413) registered 13/01/2020.


Subject(s)
Borderline Personality Disorder , Transcranial Magnetic Stimulation , Humans , Behavior Therapy , Borderline Personality Disorder/therapy , Personality , Pilot Projects , Prefrontal Cortex/physiology , Single-Blind Method , Transcranial Magnetic Stimulation/methods , Treatment Outcome , Randomized Controlled Trials as Topic
3.
Psychogeriatrics ; 23(6): 963-972, 2023 Nov.
Article in English | MEDLINE | ID: mdl-37673659

ABSTRACT

BACKGROUND: Distressing behavioural symptoms, particularly agitation and aggressiveness, remain a difficult problem in everyday clinical practice in the treatment of multimorbid patients with dementia. Clozapine may be an effective therapeutic alternative in this context. METHODS: In a retrospective study, patients who had a diagnosis of dementia and had been treated in a specialized geriatric psychiatry unit with clozapine between August 2018 and February 2022 were included, and medical records were systematically reviewed. The Clinical Global Impressions Scale was used to assess improvement, and the Pittsburgh Agitation Scale for symptom reduction. In addition, side effects and clinical features were documented in detail. RESULTS: A total of 31 patients (median age 82 years) were identified with a mean clozapine dose of 47.2 (SD 35.6) mg. A total of 13 patients tolerated clozapine very well, 10 showed tolerable side effects, and in 10 patients side effects were the reason for stopping clozapine. Behavioural symptoms improved significantly, as indicated by the assessment scores. CONCLUSIONS: In summary, clozapine was effective and well tolerated in 23 patients, suggesting that low-dose clozapine may help to alleviate the suffering of difficult-to-treat multimorbid patients with advanced dementia and their caregivers. However, particular attention should be paid to adverse drug reactions, especially in patients with cardiovascular and pulmonary impairment.


Subject(s)
Antipsychotic Agents , Clozapine , Dementia , Humans , Aged , Aged, 80 and over , Clozapine/therapeutic use , Antipsychotic Agents/therapeutic use , Retrospective Studies , Dementia/complications , Dementia/drug therapy , Dementia/chemically induced
4.
Sci Rep ; 13(1): 7556, 2023 05 09.
Article in English | MEDLINE | ID: mdl-37160982

ABSTRACT

The aim of this study was to investigate the effect of arterial hypertension (AH) and of obstructive sleep apnea (OSA) on cognitive course in the neurocognitive disorder (NCD) cohort RIFADE which enrolled patients with NCD due to Alzheimer's disease (AD), vascular NCD (vNCD), and mixed NCD (AD + vNCD = mNCD). Multiple risk factors (RF), including AH and OSA, that contribute to the development of various kinds of dementia have been identified in previous studies. Studies that observed AH lacked investigation of long-term effects and did not isolate it from other RF. Studies involving OSA as a risk factor did not include participants with all stages of NCD. 126 subjects were screened for AH and OSA. Repeated cognitive measurements were performed with the DemTect as primary outcome and the clock drawing test as secondary outcome measure. 90 patients had AH (71.4%) and 40 patients had OSA (31.7%). RF-status had a significant effect on cognitive outcome in models with RF as single factors (AH p = 0.027, OSA p < 0.001), a 2-factor analysis with AH × OSA (AH as main factor p = 0.027) as well as a model including the 3 factors AH × OSA × diagnosis (p = 0.038). Similarly, a 3-factor model was significant for the clock-drawing test, whereas single factor-models remained insignificant. AH and OSA appear to be risk factors in common NCD and cognitive decline can be mitigated by treatment of these RF.


Subject(s)
Alzheimer Disease , Cognitive Dysfunction , Hypertension , Sleep Apnea, Obstructive , Humans , Antihypertensive Agents , Cognitive Dysfunction/diagnosis , Cognitive Dysfunction/etiology , Neurocognitive Disorders , Hypertension/complications , Hypertension/diagnosis , Sleep Apnea, Obstructive/complications , Sleep Apnea, Obstructive/diagnosis
5.
Eur Arch Psychiatry Clin Neurosci ; 273(4): 941-952, 2023 Jun.
Article in English | MEDLINE | ID: mdl-36416960

ABSTRACT

BACKGROUND: The NCD cohort study RIFADE (RIsk FActors of DEmentia) investigates the interaction of risk factors and neurocognitive disorders (NCDs) due to Alzheimer's disease (NCD-AD) and NCD of vascular type (NCD-vascular). Retrospective recruitment referred to a period from 2007 to 2018 in a single centre. In addition to the baseline visit, follow-up visits took place at 3, 6, 12 months followed by yearly visits. Visit times varied in part depending on adherence. The study also comprises an EEG bank and a bank with cerebral MRI (c-MRI). METHODS: Inclusion criteria were broad in order to cover a wide range of patterns of NCD. At baseline, patients underwent a large panel of assessments, e.g. including clinical history, diagnostic evaluation for NCD according to DSM-IV and NINDS AIREN criteria, a cognitive test battery including the DemTect, the clock drawing test and the Instrumental-Activities-of-Daily-Living-scale of Lawton and Brodie, EEG and c-MRI. At each follow-up visit, cognitive tests were repeated, in most cases also EEGs and in some cases c-MRIs. Numerous risk factors (RF) including vascular RF, atrial fibrillation, heart failure, sleep apnoea and lifestyle factors such as sedentary lifestyle, low cognitive style and smoking were evaluated for presence and for correction status at each visit, and modulation of uncorrected RF was initiated. RESULTS: Overall, 126 subjects with a clinical diagnosis of NCD were included (52% female, mean age 71 ± 10.6 years (range 35e86)), number of follow-up visits per subject 2.9 ± 2.4, observation time per subject 3.4 ± 2.8 years). Of these, 55/28/17% presented with the clinical stages subjective cognitive decline (SCD)/mild cognitive impairment (MCI)/dementia (major NCD). Clinical diagnoses, retrospectively re-evaluated according to DSM-5, were 5/21/68/6% Alzheimer´s disease (NCD-AD)/vascular NCD (NCD-vascular) / mixed NCD (NCD-AD + NCD-vascular)/unspecified NCD. First longitudinal results revealed a mean DemTect score at baseline 12.6 ± 4.2 vs last visit 12.0 ± 4.8 (p = 0.08) and a clock drawing test score at baseline 1.9 ± 1.3 vs last visit 2.3 ± 1.5 (p < 0.0001). Of all subjects with MCI or major NCD (n = 57), 19 improved in the clinical stage from baseline to last visit (33.3%). Sixteen subjects progressed from SCD or MCI (n = 104) to major NCD (15.4%). CONCLUSION: The German NCD cohort RIFADE comprises patients with all clinical stages of NCD. A considerable subgroup improved in clinical stage. Further analysis is needed to answer the question of whether modulation of multiple risk factors provides a favourable effect on cognitive outcome in NCD.


Subject(s)
Alzheimer Disease , Cognitive Dysfunction , Humans , Female , Adult , Male , Alzheimer Disease/complications , Alzheimer Disease/diagnostic imaging , Retrospective Studies , Cohort Studies , Neurocognitive Disorders , Cognitive Dysfunction/etiology , Cognitive Dysfunction/diagnosis , Neuropsychological Tests , Cognition , Disease Progression
6.
Curr Psychol ; : 1-10, 2022 May 13.
Article in English | MEDLINE | ID: mdl-35600263

ABSTRACT

The year 2020 saw the emergence of a worldwide pandemic caused by the novel coronavirus COVID-19. Measures against further spread of the virus were taken nearly everywhere in the world. Many countries also imposed social distancing rules and lockdowns on their population. This situation has caused a lot of fear and insecurity, along with reactance and even unrest in some countries. In this study, we measured the psychological concepts of resilience, reactance, positive schemas, social solidarity, and anxiety among psychiatric patients and in how far these factors influence their psychopathological anxiety during the pandemic. The aim was to better understand in what ways these factors influence pandemic anxiety to be able to reduce its negative psychological effects. Findings show a significant effect of positive schemas and social solidarity on the level of pandemic anxiety in a sample of psychiatric patients, but no correlation between resilience or reactance and pandemic anxiety. Based on these insights, the inclusion of positive schemas and social solidarity for therapy should be considered. Looking deeper into the relation between positive schemas and pandemic anxiety could provide insight into the different ways that schemas influence people's anxiety and determine whether some of them are particularly important.

7.
Psychiatr Prax ; 48(5): 250-257, 2021 Jul.
Article in German | MEDLINE | ID: mdl-33472267

ABSTRACT

BACKGROUND: Antipsychotics are the cornerstone in the treatment of schizophrenia and are primarily recommended as monotherapy by evidence-based guidelines. Nevertheless, antipsychotic polypharmacy (APP) is prevalent in routine practice and APP is also used as a quality indicator since 2016 in quality management programs. OBJECTIVE: Based on routine data of nine psychiatric hospitals of the Landschaftsverband Rheinland (LVR)/Germany the prevalence of APP was determined and correlated with factors of routine healthcare in order to monitor the adoption of APP and to discuss its feasibility as a quality indicator. MATERIALS AND METHODS: All cases with schizophrenia (ICD-10 F20.x; ≥ 18 years) discharged between June 1st, 2016, and June 1st, 2017, (in-patient and day clinic) were extracted from an established research database shared by all nine hospitals and analyzed regarding APP prevalence at the time of discharge. RESULTS: Based on 6,788 cases, the prevalence of APP was 55.5 % with an average of 2.4 antipsychotics (SD = 0.6) administered simultaneously. In multivariate analyses, significant predictors for APP were: gender (male > female), the number of days in hospital (long > short), involuntary treatment (no > yes) and the location of the hospital. CONCLUSIONS: We found a high proportion of polypharmacy in inpatient schizophrenia patients and significant differences between hospitals. The use of the results as a quality indicator (criteria ≥ 2 antipsychotics) remains dependent on the background of the individual treatment courses, which cannot be adequately represented by the existing routine data. The LVR has been using the quality indicator of ≥ 3 antipsychotics since 2018, which is discussed as a more appropriate approach for future evaluations.


Subject(s)
Antipsychotic Agents , Schizophrenia , Antipsychotic Agents/adverse effects , Drug Therapy, Combination , Female , Germany , Hospitals, Psychiatric , Humans , Male , Polypharmacy , Schizophrenia/drug therapy , Schizophrenia/epidemiology
8.
World J Biol Psychiatry ; 22(1): 14-26, 2021 01.
Article in English | MEDLINE | ID: mdl-32081071

ABSTRACT

OBJECTIVES: Biological strategies to improve treatment efficacy in clozapine-treated patients are urgently needed. Repetitive transcranial magnetic stimulation (rTMS) merits consideration as intervention for patients with persistent auditory hallucinations (AH) or negative symptoms (NS) not responding sufficiently to clozapine treatment. METHODS: Data from 10 international RCTs of rTMS for patients being treated with clozapine were pooled. Two levels of symptomatic response were defined: improvement of ≥20% and ≥50% on study-specific primary endpoint scales. Changes in the positive and negative syndrome scale (PANSS) from baseline to endpoint assessment were also analysed. RESULTS: Analyses of 131 patients did not reveal a significant difference for ≥20% and ≥50% response thresholds for improvement of AH, negative or total symptoms between active and sham rTMS groups. The number needed to treat (NNT) for an improvement in persistent AH was nine following active rTMS. PANSS scores did not improve significantly from baseline to endpoint between active and sham groups in studies investigating NS and AH. CONCLUSIONS: rTMS as a treatment for persistent symptoms in clozapine-treated patients did not show a beneficial effect of active compared to sham treatment. For AH, the size of the NNTs indicates a possible beneficial effect of rTMS.


Subject(s)
Clozapine , Schizophrenia , Double-Blind Method , Hallucinations/therapy , Humans , Schizophrenia/drug therapy , Schizophrenic Psychology , Transcranial Magnetic Stimulation , Treatment Outcome
9.
Ann Neurol ; 88(4): 703-711, 2020 10.
Article in English | MEDLINE | ID: mdl-32662116

ABSTRACT

OBJECTIVE: The aim was to investigate whether neurodegenerative biomarkers in cerebrospinal fluid (CSF) differentiate patients with suspected normal pressure hydrocephalus (NPH) who respond to CSF drainage from patients who do not respond. METHODS: Data from 62 consecutive patients who presented with magnetic resonance imaging changes indicative of NPH were studied with regard to cognitive and gait functions before and after drainage of 40-50ml of CSF. Additionally, S100 protein, neuron-specific enolase, ß-amyloid protein, tau protein and phospho-tau were determined in CSF. Statistical analyses were carried out with ANOVA and multiple linear regression. RESULTS: Patients with CSF constellations typical for Alzheimer's disease (n = 28) improved significantly in cognitive and gait-related functions after CSF drainage. In contrast, those patients without a CSF constellation typical for Alzheimer's disease (n = 34) did not improve in cognitive and gait-related functions after CSF drainage. In addition, positive CSF biomarkers for Alzheimer's disease predicted these improvements. INTERPRETATION: Our data suggest an association between Alzheimer's disease and NPH changes, supporting the recently suggested dichotomy of a neurodegenerative NPH and a true idiopathic NPH, with the latter appearing to be rare. ANN NEUROL 2020;88:703-711.


Subject(s)
Alzheimer Disease/cerebrospinal fluid , Alzheimer Disease/diagnosis , Hydrocephalus, Normal Pressure/cerebrospinal fluid , Hydrocephalus, Normal Pressure/diagnosis , Aged , Aged, 80 and over , Alzheimer Disease/etiology , Biomarkers/cerebrospinal fluid , Cognitive Dysfunction/etiology , Female , Gait Disorders, Neurologic/etiology , Humans , Hydrocephalus, Normal Pressure/complications , Male , Spinal Puncture
10.
J Alzheimers Dis ; 72(4): 1119-1127, 2019.
Article in English | MEDLINE | ID: mdl-31683478

ABSTRACT

BACKGROUND: Increased expression of the astroglial Ca2+-binding protein S100B has been observed in various neurodegenerative diseases and also seems to play a role in the unfolding of pathophysiological events at early stages of Alzheimer's disease (AD). OBJECTIVE: To examine the association of cerebrospinal fluid (CSF) levels of S100B with 1) established CSF core biomarkers total tau (tau), hyperphosphorylated tau (p-tau), and amyloid ß1-42 (Aß1-42) as well as neuron-specific enolase (NSE) CSF levels and 2) cognition in early AD and mild cognitive impairment (MCI) due to AD (MCI-AD). METHODS: Retrospective study assessing 49 pooled charts of Memory Clinic and inpatients diagnosed with AD (N = 26) and MCI-AD (N = 23) according to the National Institute of Aging and Alzheimer's Disease Association (NIA-AA) criteria. Neuropsychological testing was performed with the Consortium to Establish a Registry for AD (CERAD)-Plus battery. RESULTS: CSF levels of S100B correlated with NSE, but not the other CSF parameters. Stepwise multiple linear regression, adjusted for age, sex, and educational level, revealed that only increased CSF S100B was independently associated with lower CERAD-Plus total and Mini-Mental Status Examination scores together with poorer performance in wordlist learning (delayed recall and overall performance). We found no independent associations with other CSF biomarkers or cognitive domains. CONCLUSION: Our data suggest that CSF S100B may have a diagnostic value particularly at early stages of AD reflecting the significance of neuroinflammatory/astroglial processes. Thus, CSF S100B may complement the established array of available AD biomarkers to improve early stage diagnosis.


Subject(s)
Alzheimer Disease/diagnosis , Amyloid beta-Peptides/cerebrospinal fluid , Cognitive Dysfunction/diagnosis , Peptide Fragments/cerebrospinal fluid , S100 Calcium Binding Protein beta Subunit/cerebrospinal fluid , tau Proteins/cerebrospinal fluid , Aged , Alzheimer Disease/cerebrospinal fluid , Alzheimer Disease/psychology , Biomarkers/cerebrospinal fluid , Cognitive Dysfunction/cerebrospinal fluid , Cognitive Dysfunction/psychology , Disease Progression , Female , Humans , Male , Middle Aged , Neuropsychological Tests , Phosphopyruvate Hydratase/cerebrospinal fluid , Phosphorylation , Registries , Retrospective Studies
11.
J Clin Exp Neuropsychol ; 41(8): 875-880, 2019 10.
Article in English | MEDLINE | ID: mdl-31322045

ABSTRACT

Posterior cortical atrophy (PCA) is a rare form of dementia primarily characterized by slowly progressing deterioration of visual processing corresponding to atrophy in the posterior parietal and occipital cortices with less prominent memory loss than are usually seen in other forms of dementia such as Alzheimer's Disease (AD). In the present case report, we describe longitudinal data over a period of 11 years regarding clinical and neuropsychological impairments and their relation to the location and extent of cortical changes related to higher order visual processing in a patient with posterior cortical atrophy. In our patient, visual processing deficits concerning space, motion and object perception emerged at the age of 50 and continued to worsen. By the age of 58, while the perception of contrast, color and figure-ground separation appeared undisturbed the patient exhibited pronounced dorsal- and ventral-related visual deficits, which continued to worsen with age. The patient's MRI scans over the course of the disease revealed increasing circumscribed and bilateral atrophy of the parietal and occipital cortices, with a right-sided predominance. The specific localization of cortical atrophy, the slow progression characterized by visual processing deficits and relatively preserved memory were the main criteria for the diagnosis of posterior cortical atrophy. The case report also highlights the importance of an early extensive neurological and neuropsychological evaluation of visual deficits that occur without the presence of ophthalmological disease.


Subject(s)
Alzheimer Disease/diagnosis , Alzheimer Disease/pathology , Occipital Lobe/pathology , Parietal Lobe/pathology , Perceptual Disorders/pathology , Visual Perception/physiology , Aged , Agnosia/diagnosis , Agnosia/physiopathology , Alzheimer Disease/physiopathology , Atrophy , Disease Progression , Dominance, Cerebral , Female , Humans , Longitudinal Studies , Magnetic Resonance Imaging , Male , Middle Aged , Neuropsychological Tests , Occipital Lobe/physiopathology , Parietal Lobe/physiopathology , Perceptual Disorders/diagnosis , Perceptual Disorders/physiopathology , Psychomotor Disorders/diagnosis , Psychomotor Disorders/physiopathology
12.
Fortschr Neurol Psychiatr ; 86(11): 690-698, 2018 11.
Article in German | MEDLINE | ID: mdl-30654401

ABSTRACT

Due to the efficacy of electroconvulsive therapy (ECT) in the guideline-based treatment of therapy-resistant depressive episodes and the clinical significance of cognitive impairments, it is necessary to optimize the management of potential side effects. As cognitive side effects of the treatment combined with impairments resulting from the depression may lead to a reduction in the ability to function in social contexts and reduce subjective wellbeing, comprehensive information about and monitoring of potential side effects is essential. In this review we present the clinical relevance and measurement of cognitive side effects that may occur during electroconvulsive therapy. The individual characteristics of the patient as well as the technical and pharmacological parameters that influence the effect of ECT on cognition will be discussed. Furthermore, the recommendations of national and international treatment guidelines for the monitoring of cognitive side effects will be summarized.After ECT, impairments of global cognition, and anterograde as well as retrograde amnesia may occur. While the first two side effects appear to be transient, the extent of retrograde amnesia, particularly for autobiographical information, is not yet well understood and may potentially be present for a longer period. A controversial issue in this context is the question whether there are appropriate instruments for the monitoring of reduction in cognitive performance. In clinical context, a number of different measures are used, and in many cases, monitoring is omitted due to lack of time and methodological uncertainty. Current national and international guidelines make very different suggestions about the monitoring of cognitive side effects during ECT and in German-speaking regions no concrete recommendations are available. In this context, we recommend a revision of current guidelines and identify future areas of research that would further our understanding of the effects of ECT on cognition. These may enable us to keep an eye on these deficiencies better as well as allow us to identify patients that may have a higher risk of developing such impairments.


Subject(s)
Cognition Disorders/etiology , Depressive Disorder, Treatment-Resistant/psychology , Depressive Disorder, Treatment-Resistant/therapy , Electroconvulsive Therapy/adverse effects , Neuropsychological Tests , Humans , Treatment Outcome
13.
Brain Struct Funct ; 221(4): 1877-97, 2016 05.
Article in English | MEDLINE | ID: mdl-25687261

ABSTRACT

The microstructural correlates of the functional segregation of the human lateral occipital cortex are largely unknown. Therefore, we analyzed the cytoarchitecture of this region in ten human post-mortem brains using an observer-independent and statistically testable parcellation method to define the position and extent of areas in the lateral occipital cortex. Two new cytoarchitectonic areas were found: an anterior area hOc4la and a posterior area hOc4lp. hOc4la was located behind the anterior occipital sulcus in rostral and ventral portions of this region where it occupies the anterior third of the middle and inferior lateral occipital gyri. hOc4lp was found in caudal and dorsal portions of this region where it extends along the superior and middle lateral occipital gyri. The cytoarchitectonic areas were registered to 3D reconstructions of the corresponding brains, which were subsequently spatially normalized to the Montreal Neurological Institute reference space. Continuous probabilistic maps of both areas based on the analysis of ten brains were generated to characterize their inter-subject variability in location and size. The maps of hOc4la and hOc4lp were then used as seeds for meta-analytic connectivity modeling and quantitative functional decoding to identify their co-activation patterns and assignment to functional domains. Convergent evidence from their location, topography, size, functional domains and connectivity indicates that hOc4la and hOc4lp are the potential anatomical correlates of the functionally defined lateral occipital areas LO-1 and LO-2.


Subject(s)
Occipital Lobe/cytology , Occipital Lobe/physiology , Aged , Brain Mapping , Cluster Analysis , Female , Humans , Image Processing, Computer-Assisted , Magnetic Resonance Imaging , Male , Middle Aged , Neural Pathways/cytology , Neural Pathways/physiology , Neuroanatomical Tract-Tracing Techniques/methods , Principal Component Analysis , Visual Cortex/cytology , Visual Cortex/physiology
14.
Brain Struct Funct ; 218(1): 157-72, 2013 Jan.
Article in English | MEDLINE | ID: mdl-22354469

ABSTRACT

The dorsal visual stream consists of several functionally specialized areas, but most of their cytoarchitectonic correlates have not yet been identified in the human brain. The cortex adjacent to Brodmann area 18/V2 was therefore analyzed in serial sections of ten human post-mortem brains using morphometrical and multivariate statistical analyses for the definition of areal borders. Two previously unknown cytoarchitectonic areas (hOc3d, hOc4d) were detected. They occupy the medial and, to a smaller extent, lateral surface of the occipital lobe. The larger area, hOc3d, is located dorso-lateral to area V2 in the region of superior and transverse occipital, as well as parieto-occipital sulci. Area hOc4d was identified rostral to hOc3d; it differed from the latter by larger pyramidal cells in lower layer III, thinner layers V and VI, and a sharp cortex-white-matter borderline. The delineated areas were superimposed in the anatomical MNI space, and probabilistic maps were calculated. They show a relatively high intersubject variability in volume and position. Based on their location and neighborhood relationship, areas hOc3d and hOc4d are putative anatomical substrates of functionally defined areas V3d and V3a, a hypothesis that can now be tested by comparing probabilistic cytoarchitectonic maps and activation studies of the living human brain.


Subject(s)
Occipital Lobe/cytology , Pyramidal Cells/cytology , Adult , Aged , Aged, 80 and over , Anatomy, Artistic , Atlases as Topic , Autopsy , Female , Humans , Image Interpretation, Computer-Assisted , Magnetic Resonance Imaging , Male , Middle Aged , Models, Statistical , Multivariate Analysis , Probability , Visual Cortex/cytology , Visual Pathways/cytology
15.
Neuroimage ; 49(2): 1171-9, 2010 Jan 15.
Article in English | MEDLINE | ID: mdl-19800409

ABSTRACT

Cytoarchitectonic maps of human striate and extrastriate visual cortex based upon post-mortem brains can be correlated with functionally defined cortical areas using, for example, fMRI. We here assess the correspondence of anatomical maps of the visual cortex with functionally defined in vivo visual areas using retinotopic mapping. To this end, anatomical maximum probability maps (aMPM) derived from individual cytoarchitectonic maps of striate and extrastriate visual areas were compared with functional localisers for the early visual areas. Using fMRI, we delineated dorsal and ventral human retinotopic areas V1, V2, and V3, as well as a quarter-field visual field representation lateral to V3v, V4(v), in 24 healthy subjects. Based on these individual definitions, a functional maximum probability map (fMPM) was then computed in analogy to the aMPM. Functional and anatomical MPMs were highly correlated at group level: 78.5% of activated voxels in the fMPM were correctly assigned by the aMPM. The group aMPM was less effective in predicting functional retinotopic areas in the individual brain due to the large inter-individual variability in the location and extent of visual areas (mean overlap 32-69%). We conclude that cytoarchitectonic maps of striate and extrastriate visual areas may provide a valuable method for assigning functional group activations and thus add valuable a priori knowledge to the analysis of functional imaging data of the visual cortex.


Subject(s)
Visual Cortex/cytology , Visual Cortex/physiology , Visual Pathways/cytology , Visual Pathways/physiology , Visual Perception/physiology , Adult , Brain Mapping , Female , Humans , Male , Photic Stimulation , Probability , Young Adult
16.
Cereb Cortex ; 18(11): 2637-45, 2008 Nov.
Article in English | MEDLINE | ID: mdl-18321873

ABSTRACT

This receptorarchitectonic study of the human visual cortex investigated interareal differences in mean receptor concentrations and laminar distribution patterns of 16 neurotransmitter receptors in the dorsal and ventral parts of areas V1, V2, V3 as well as in adjoining areas V4 (ventrally) and V3A (dorsally). Both the functional hierarchy of these areas and a distinction between dorsal and ventral visual cortices were reflected by significant receptorarchitectonic differences. The observation that dorso-ventral differences existed in all extrastriate areas (including V2) is particularly important for the discussion about the relationship between dorsal and ventral V3 as it indicates that a receptorarchitectonic distinction between the ventral and dorsal visual cortices is present in but not specific to V3. This molecular specificity is mirrored by previously reported differences in retinal microstructure and functional differences as revealed in behavioral experiments demonstrating differential advantages for stimulus processing in the upper and lower visual fields. We argue that these anatomical and functional differences may be regarded as the result of an evolutionary optimization adapting to the processing of the most relevant stimuli occurring in the upper and lower visual fields.


Subject(s)
Brain Mapping , Receptors, Neurotransmitter/metabolism , Visual Cortex/cytology , Visual Cortex/physiology , Aged , Autoradiography , Female , Humans , In Vitro Techniques , Male , Radioligand Assay , Visual Cortex/metabolism , Visual Pathways/cytology , Visual Pathways/metabolism , Visual Pathways/physiology
17.
Hum Brain Mapp ; 28(10): 1045-59, 2007 Oct.
Article in English | MEDLINE | ID: mdl-17266106

ABSTRACT

The extrastriate visual cortex forms a complex system enabling the analysis of visually presented objects. To gain deeper insight into the anatomical basis of this system, we cytoarchitectonically mapped the ventral occipital cortex lateral to BA 18/V2 in 10 human postmortem brains. The anatomical characterization of this part of the ventral stream was performed by examination of cell-body-stained histological sections using quantitative cytoarchitectonic analysis. First, the gray level index (GLI) was measured in the ventral occipital lobe. Cytoarchitectonic borders, i.e., significant changes in the cortical lamination pattern, were then identified using an observer-independent algorithm based on multivariate analysis of GLI profiles. Two distinct cytoarchitectonic areas (hOC3v, hOC4v) were characterized in the ventral extrastriate cortex lateral to BA 18/V2. Area hOC3v was found in the collateral sulcus. hOC4v was located in this sulcus and also covered the fusiform gyrus in more occipital sections. Topographically, these areas thus seem to represent the anatomical substrates of functionally defined areas, VP/V3v and V4/V4v. Following histological analysis, the delineated cytoarchitectonic areas were transferred to 3D reconstructions of the respective postmortem brains, which in turn were spatially normalized to the Montreal Neurological Institute reference space. A probabilistic map was generated for each area which describes how many brains had a representation of this area in a particular voxel. These maps can now be used to identify the anatomical correlates of functional activations observed in neuroimaging experiments to enable a more informed investigation into the many open questions regarding the organization of the human visual cortex.


Subject(s)
Brain Mapping/methods , Neurons/cytology , Occipital Lobe/anatomy & histology , Visual Cortex/anatomy & histology , Visual Pathways/anatomy & histology , Adult , Aged , Aged, 80 and over , Female , Humans , Image Processing, Computer-Assisted , Magnetic Resonance Imaging/methods , Male , Middle Aged , Models, Statistical , Neuroanatomy/methods , Neurons/physiology , Occipital Lobe/physiology , Staining and Labeling , Visual Cortex/physiology , Visual Pathways/physiology
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