RESUMO
OBJECTIVE: To describe the ongoing Clinical Tracking Form (CTF) study of the Defense and Veterans Brain Injury Center (DVBIC). DESIGN: Prospective longitudinal study. Data at baseline and postinjury are collected on participants through interview and questionnaire, review of medical records, and periodic follow-ups throughout their lifetime. SETTING: A regional DVBIC site located at a Veterans Affairs Medical Center. PARTICIPANTS: Participants (N=211; age range, 18-75y) were enrolled between January 1, 2005, and December 31, 2012, at a regional DVBIC site. INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Injury information, functioning, and psychological health. RESULTS: Sixty percent of 211 participants were identified as having severe traumatic brain injuries (TBIs), 14% moderate TBIs, and 26% mild TBIs. Of these 211 participants, 79% sustained closed head injuries, 15% penetrating head injuries, and 6% were not reported. Comparing the severity of TBI in combat versus stateside situations, most of the mild injuries (71%) occurred in combat locations, while most of the severe injuries (62%) occurred in the United States. Among those injured in combat, blast-related TBIs (82%) greatly outnumbered non-blast-related TBIs, regardless of severity. CONCLUSIONS: The CTF study serves as a significant resource of data to understand the effect and outcomes of TBI in the military population. The lifelong experience of military veterans across the full spectrum of TBI and recovery will be recorded through the CTF, and will translate into more informed clinical decisions and educational efforts to guide future research pathways.
Assuntos
Lesões Encefálicas Traumáticas/epidemiologia , Militares/estatística & dados numéricos , Vigilância em Saúde Pública/métodos , Veteranos/estatística & dados numéricos , Adolescente , Adulto , Distribuição por Idade , Idoso , Traumatismos por Explosões/epidemiologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Distribuição por Sexo , Fatores Socioeconômicos , Índices de Gravidade do Trauma , Estados Unidos , Adulto JovemRESUMO
PRIMARY OBJECTIVE: The objective of this paper is to identify the most frequent service needs, factors associated with needs, and barriers to care among Veterans and service members five or more years after moderate to severe traumatic brain injury (TBI). RESEARCH DESIGN: Survey administered via telephone 5-16 years after injury (median eight years) and subsequent acute inpatient rehabilitation at a regional Veterans Affairs (VA) medical centre. METHODS AND PROCEDURES: Participants were 119 Veterans and military personnel, aged 23-70 (median 35), 90% male. Demographics, injury characteristics, service needs, whether needs were addressed, barriers to care, health and general functioning were assessed. MAIN OUTCOMES AND RESULTS: The most frequent needs were for help with memory, information about available services and managing stress. Obtaining information about services was the most consistently un-addressed need; managing stress was the most consistently addressed need. Cognitive and psychiatric symptoms and alienation from community were associated with needs going un-addressed. Participants treated after an expansion of TBI services at the study site reported fewer un-addressed needs. Not knowing where to get help was the most common barrier to care. CONCLUSION: Repeated outreach, assessment of needs and education about available services are needed throughout Veterans' lifespan after moderate to severe TBI.
Assuntos
Lesões Encefálicas Traumáticas/terapia , Acessibilidade aos Serviços de Saúde , Necessidades e Demandas de Serviços de Saúde , Saúde dos Veteranos , Veteranos , Adulto , Idoso , Lesões Encefálicas Traumáticas/diagnóstico , Feminino , Humanos , Escala de Gravidade do Ferimento , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
OBJECTIVE: To assess long-term outcomes after traumatic brain injury (TBI) among veterans and service members. SETTING: Regional Veterans Affairs medical centre. PARTICIPANTS: One hundred and eighteen veterans and military personnel, aged 23-70 years (median = 35 years), 90% male, had moderate-to-severe TBI (82% in coma > 1 day, 85% amnesic > 7 days), followed by acute interdisciplinary rehabilitation 5-16 years ago (median = 8 years). DESIGN: Cross-sectional analysis of live interviews conducted via telephone. MAIN MEASURES: TBI follow-up interview (occupational, social, cognitive, neurologic and psychiatric ratings), Community Integration Questionnaire, Disability Rating Scale (four indices of independent function) and Satisfaction with Life Scale. RESULTS: At follow-up, 52% of participants were working or attending school; 34% ended or began marriages after TBI, but the overall proportion married changed little. Finally, 22% were still moderately-to-severely disabled. However, 62% of participants judged themselves to be as satisfied or more satisfied with life than before injury. Injury severity, especially post-traumatic amnesia, was correlated with poorer outcomes in all functional domains. CONCLUSIONS: After moderate-severe TBI, most veterans assume productive roles and are satisfied with life. However, widespread difficulties and functional limitations persist. These findings suggest that veteran and military healthcare systems should continue periodic, comprehensive follow-up evaluations long after moderate-to-severe TBI.
Assuntos
Lesões Encefálicas Traumáticas/reabilitação , Militares , Veteranos , Adulto , Idoso , Lesões Encefálicas Traumáticas/fisiopatologia , Integração Comunitária , Estudos Transversais , Feminino , Humanos , Entrevista Psicológica , Masculino , Pessoa de Meia-Idade , Recuperação de Função Fisiológica , Inquéritos e Questionários , Resultado do TratamentoRESUMO
OBJECTIVE: To examine self-awareness 5 years or more after traumatic brain injury (TBI) and its relation to outcomes. PARTICIPANTS: Sixty-two adults with moderate to severe TBI and significant other (SO) informants (family or close friend). SETTING: Regional veterans medical center. MAIN MEASURES: TBI Follow-up Interview, Community Integration Questionnaire, Satisfaction with Life Scale, and Caregiver Burden Inventory. DESIGN: Five to 16 years after acute inpatient rehabilitation, separate staff contacted and interviewed subjects and SOs. Subject awareness was defined as inverse subject-SO discrepancy scores. RESULTS: Subjects significantly underreported neurologic symptoms and overreported their work and home functioning; their self-ratings of emotional distress and social functioning did not differ from SO ratings. Employment was associated with greater self-awareness of cognitive deficits, even after controlling for injury severity. Subjects' life-satisfaction was associated with better self-reported neurologic functioning, which frequently did not agree with SO ratings. Caregiver burden was worse as SOs perceived subjects as having worse symptoms and poorer work and social integration. CONCLUSIONS: Impaired self-awareness remains evident more than 5 years after TBI. People with TBI are more likely to gain employment when they are aware of their cognitive deficits and abilities. However, subjective quality of life, for subjects and SOs, was related to their own perception of the TBI outcomes.
Assuntos
Conscientização , Lesões Encefálicas/psicologia , Lesões Encefálicas/reabilitação , Transtornos Cognitivos/diagnóstico , Transtornos Mentais/diagnóstico , Autoavaliação (Psicologia) , Adaptação Psicológica , Adulto , Lesões Encefálicas/diagnóstico , Transtornos Cognitivos/epidemiologia , Estudos de Coortes , Feminino , Seguimentos , Hospitais de Veteranos , Humanos , Escala de Gravidade do Ferimento , Masculino , Transtornos Mentais/epidemiologia , Pessoa de Meia-Idade , Testes Neuropsicológicos , Valor Preditivo dos Testes , Qualidade de Vida , Reprodutibilidade dos Testes , Medição de Risco , Perfil de Impacto da Doença , Inquéritos e Questionários , Fatores de Tempo , Resultado do TratamentoRESUMO
Maternal exposure to genital and reproductive infections has been associated with schizophrenia in previous studies. Impairments in several neuropsychological functions, including verbal memory, working memory, executive function, and fine-motor coordination occur prominently in patients with schizophrenia. The etiologies of these deficits, however, remain largely unknown. We aimed to assess whether prospectively documented maternal exposure to genital/reproductive (G/R) infections was related to these neuropsychological deficits in offspring with schizophrenia and other schizophrenia spectrum disorders. The cases were derived from a population-based birth cohort; all cohort members belonged to a prepaid health plan. Cases were assessed for verbal memory, working memory, executive function, and fine-motor coordination. Compared to unexposed cases, patients exposed to maternal genital/reproductive infection performed more poorly on verbal memory, fine-motor coordination, and working memory. Stratification by race revealed associations between maternal G/R infection and verbal memory and fine-motor coordination for case offspring of African-American mothers, but not for case offspring of White mothers. Significant infection-by-race interactions were also observed. Although independent replications are warranted, maternal G/R infections were associated with verbal memory and motor function deficits in African-American patients with schizophrenia.
Assuntos
Herpes Genital/fisiopatologia , Transtornos da Memória/etiologia , Transtornos dos Movimentos/etiologia , Efeitos Tardios da Exposição Pré-Natal/fisiopatologia , Esquizofrenia/complicações , Aprendizagem Verbal/fisiologia , Adulto , Estudos de Coortes , Ensaio de Imunoadsorção Enzimática , Função Executiva , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Destreza Motora/fisiologia , Testes Neuropsicológicos , Gravidez , Adulto JovemRESUMO
Increased length of the cavum septum pellucidum (CSP) and in utero infection are each associated with increased risk of schizophrenia. Hence, we examined whether prenatal infections are related to CSP length in schizophrenia patients. In a well-characterized birth cohort, in utero infection was assessed using serologic biomarkers or physician diagnoses. Magnetic resonance images were acquired, and CSP length was quantified by a standard protocol. In utero infection was associated with increased CSP length in exposed schizophrenia cases compared to unexposed cases, suggesting that prenatal infection plays a role in a neurodevelopmental morphologic anomaly that has been related previously to schizophrenia.
Assuntos
Complicações na Gravidez , Esquizofrenia/etiologia , Esquizofrenia/patologia , Septo Pelúcido/anormalidades , Adulto , Estudos de Coortes , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Gravidez , Complicações na Gravidez/classificaçãoRESUMO
A large number of Operation Enduring Freedom/Operation Iraqi Freedom returnees are seeking DOD and VA rehabilitative care for war-related traumatic brain injury (TBI). This article reviews evidence on the utility of driving simulators as tools for assessment and training in TBI rehabilitation. Traditionally, cognitive rehabilitation has been shown to improve specific cognitive skills. However, there are few studies and only weak evidence to show that these gains transfer to everyday activities. Theoretically, modern driving simulators may be useful in cognitive rehabilitation because they can systematically present realistic and interesting tasks that approximate driving activities, while automatically monitoring performance. The use of simulation technology for patients with TBI provides cognitive stimulation in an ecologically compatible setting, without the risks associated with a corresponding real-world experience. The utility, limitations, and future directions for the use of driving simulator in the rehabilitation of patients with war-related TBI are discussed.
Assuntos
Lesões Encefálicas/psicologia , Terapia Cognitivo-Comportamental , Militares , HumanosRESUMO
Historically, cognitive event-related potentials (ERPs) have received limited acceptance for clinical use due to lack of evidence for their reliability. However, recent advances in computer technology and artifact rejection methods have greatly enhanced the fidelity of ERP measurements. The present study examined the test-retest reliability of ERP measurement by using current data processing methods. We assessed the temporal stability of the most commonly used ERP paradigm, auditory pure-tone "odd ball" detection, and compared it with other commonly used clinical measures reported in the literature. Auditory ERPs were collected in 19 healthy subjects and 7 patients with traumatic brain injury at two time points, 2 days to 2 months apart. Test-retest reliability was calculated for four ERP components: N1, MMN (mismatch negativity), P3, and N4. In healthy subjects, temporal stabilities of these four commonly studied ERP components' amplitude measurements were moderate to high, with intraclass correlations ranging from 0.6 to 0.8. In contrast, in patients with traumatic brain injury, ERPs were stable only for the N1 component (intraclass correlation = 0.7).
Assuntos
Lesões Encefálicas/fisiopatologia , Encéfalo/fisiologia , Potenciais Evocados Auditivos/fisiologia , Adolescente , Adulto , Potenciais Evocados P300/fisiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos TestesRESUMO
This study compared the effectiveness of P300 event related potentials (ERPs) and reaction time (RT) in discriminating patients with traumatic brain injury (TBI) from healthy control subjects. In particular, we examined how the use of more complex, ecologically relevant stimuli may affect the clinical utility of these tasks. We also evaluated how length of posttraumatic amnesia (PTA) and loss of consciousness (LOC) related to P300 and RT measures in our patient sample. There were 22 subjects (11 patients with TBI and 11 age-matched healthy control subjects). Four stimulus detection procedures were used: two using simple, conventional stimuli (auditory tone discrimination, AT; visual color discrimination, VC), and two using complex, ecologically relevant stimuli in the auditory and visual modalities (auditory word category discrimination, AWC; visual facial affect discrimination, VFA). Our results showed that RT measures were more effective in identifying TBI patients when complex stimuli were used (AWC and VFA). On the other hand, ERP measures were more effective in identifying TBI patients when simple stimuli were used (AT and VC). We also found a remarkably high correlation between duration of PTA and P300 amplitude.
Assuntos
Lesões Encefálicas/diagnóstico , Encéfalo/fisiopatologia , Potenciais Evocados P300/fisiologia , Testes Neuropsicológicos , Estimulação Acústica , Humanos , Estimulação Luminosa , Tempo de ReaçãoRESUMO
Source memory is impaired in schizophrenia, and this deficit is related to symptoms of interpersonal antagonism such as suspiciousness and hostility. The present study evaluated source memory in borderline personality disorder (BPD) and its relation to interpersonal antagonism. Forty-one noninpatient adults with BPD according to the DSM-IV and 26 healthy control subjects performed a verbal source memory test requiring completion of sentences with and without emotional content ("Hot" vs. "Cold" sentences). Subjects also completed self-report measures of suspiciousness and interpersonal antagonism (Buss-Durkee Hostility Inventory) and depression (Beck Depression Inventory). The BPD group showed no significant difference from the control group in self-referential source memory, recognition memory, response bias, and performance enhancement for items with emotion content. However, in the BPD group, poorer self-referential source memory was significantly related to Hostility measures including suspiciousness, but not with Depression scores. In contrast, generic item recognition memory was unrelated to Hostility. Heterogeneity in source memory function may be specifically related to some of the hallmark interpersonal disturbances of BPD, independent of the effects of general negative affect or general memory impairment.
Assuntos
Afeto , Transtorno da Personalidade Borderline/complicações , Transtornos Cognitivos/etiologia , Hostilidade , Transtornos da Memória/etiologia , Adulto , Atitude Frente a Saúde , Feminino , Humanos , Relações Interpessoais , Masculino , Transtornos da Memória/diagnóstico , Rememoração Mental , Pessoa de Meia-Idade , Testes Neuropsicológicos , Inquéritos e QuestionáriosRESUMO
Traumatic brain injury (TBI) frequently leads to deficits in social behavior. Prior research suggests that such deficits may result from impaired perception of basic social cues. However, these social-emotional deficits have not been studied electrophysiologically. We measured the P300 event-related potential (ERP), which has been shown to be a sensitive index of cognitive efficiency, in 13 patients with a history of moderate to severe TBI and in 13 healthy controls. The P300 response was measured during detection of 30 pictures of angry faces (rare target) randomly distributed among 120 neutral faces (frequent nontarget). Compared to control subjects, the TBI group's P300 responses were significantly delayed in latency (p = 0.002) and lower in amplitude (p = 0.003). TBI patients also showed slower reaction times and reduced accuracy when manually signaling their detection of angry faces. Coefficients of variation (CV) for the facial P300 response compared favorably to those of many standard clinical assays, suggesting potential clinical utility. For this study, we demonstrated the feasibility of studying TBI patients' P300 responses during the recognition of facial affect. Compared to controls, TBI patients showed significantly impaired electrophysiological and behavioral responses while attempting to detect affective facial cues. Additional studies are required for clinicians to determine whether this measure is related to patients' psychosocial function in the community.
Assuntos
Afeto , Lesões Encefálicas/reabilitação , Potenciais Evocados P300 , Percepção Social , Eletroencefalografia , Feminino , Escala de Coma de Glasgow , Humanos , Masculino , Tempo de ReaçãoRESUMO
OBJECTIVE: The authors' goals were 1) to establish a clinically useful standard index of the relative anticholinergic potency of psychiatric medications; 2) to determine which cognitive functions are most affected by the administration of anticholinergic medications to patients with schizophrenia; and 3) to compare in vitro and clinically derived indexes of anticholinergic load in predicting these cognitive impairments. METHOD: One hundred six clinically stable patients with schizophrenia were given a brief neuropsychological battery and evaluated on a standard symptom rating scale. The anticholinergic load associated with their psychiatric medications was estimated by using 1) a pharmacological index, calculated from a compilation of published studies reporting in vitro brain muscarinic receptor antagonism, and 2) a clinical index, based on clinician ratings of the anticholinergic side effects of medications. The authors analyzed the correlations of both indexes with the neuropsychological measures and with summary neuropsychological factor scores. RESULTS: The clinical and pharmacological anticholinergic indexes were highly correlated with each other and showed virtually identical associations with neuropsychological measures. Anticholinergic load was associated with lower scores on measures of attention and declarative memory, including several measures of auditory and visual memory and two tests of complex attention, but was unrelated to intelligence, simple attention, working memory, executive functions, conceptual fluency, or motor speed. CONCLUSIONS: This pattern of cognitive impairment with central cholinergic antagonism is consistent with emerging models of the functional anatomy of ascending forebrain cholinergic subsystems. Both pharmacological and clinical indexes show utility in predicting the effects of anticholinergic load on cognition in schizophrenia. Doses of psychiatric medication within the range of routine pharmacotherapy practice may have clinically significant effects on memory and complex attention in patients with schizophrenia; these effects may contribute as much as one-third to two-thirds of the memory deficit typically seen in patients with schizophrenia.
Assuntos
Antipsicóticos/uso terapêutico , Atenção , Antagonistas Colinérgicos/uso terapêutico , Fibras Colinérgicas/efeitos dos fármacos , Transtornos Cognitivos/diagnóstico , Transtornos Cognitivos/etiologia , Transtornos da Memória/etiologia , Transtornos Psicóticos/complicações , Transtornos Psicóticos/tratamento farmacológico , Esquizofrenia/complicações , Esquizofrenia/tratamento farmacológico , Adulto , Afeto , Antipsicóticos/administração & dosagem , Antipsicóticos/classificação , Antagonistas Colinérgicos/administração & dosagem , Relação Dose-Resposta a Droga , Escolaridade , Feminino , Humanos , Masculino , Transtornos da Memória/diagnóstico , Transtornos Psicóticos/diagnóstico , Esquizofrenia/diagnóstico , Índice de Gravidade de Doença , Inquéritos e Questionários , Escalas de WechslerRESUMO
We systematically examined the relationship of both lexical retrieval and semantic memory organization to categorical verbal fluency performance in 40 outpatient schizophrenic subjects and 16 healthy controls. Mean choice reaction time (RT) on a lexical decision task was used as a measure of lexical retrieval efficiency. The complexity of semantic memory organization was measured using a Pathfinder semantic network analysis (calculated as the number of inter-node links obtained from a similarity rating task). In the schizophrenia group only, RT and semantic network links were each significantly negatively correlated with fluency and, together, accounted for 23% of the variance in fluency. RT and links were not significantly correlated with one another. Findings were unrelated to age, sex, education, or medication dose. Controlling for IQ reduced but did not abolish the relationship between fluency and network links. We conclude that the restricted verbal output of schizophrenic subjects is related both to impaired lexical retrieval and to variation in semantic memory organization, which partly reflects general intelligence. The statistical independence of the retrieval speed and organizational factors suggests that individuals with schizophrenia differ in the underlying processes that contribute to their reduced verbal fluency.
Assuntos
Transtornos da Linguagem/etiologia , Transtornos da Memória/etiologia , Esquizofrenia/complicações , Semântica , Comportamento Verbal , Adulto , Feminino , Humanos , Transtornos da Linguagem/diagnóstico , Masculino , Transtornos da Memória/diagnóstico , Testes Neuropsicológicos , Valor Preditivo dos Testes , Tempo de Reação , Índice de Gravidade de Doença , Fatores de TempoRESUMO
BACKGROUND: Antiglucocorticoids, such as ketoconazole, have been investigated as antidepressant agents in major depression and other conditions. Despite evidence that a significant number of patients with schizophrenia and schizoaffective disorder are both hypercortisolemic and depressed, the antidepressant effects of antiglucocorticoids have never been assessed in these populations. METHODS: Fifteen symptomatic patients with diagnoses of schizophrenia or schizoaffective disorder, who were at least partially treatment-resistant, were treated with ketoconazole, up to 800 mg/day, (n = 8) or placebo (n = 7) for four weeks in a double-blind manner. The study medication was added to a pre-stabilized antipsychotic and/or antidepressant medication regimen. RESULTS: Ketoconazole treatment, compared to placebo, was associated with significant improvements in observer-rated depression, but not in subjectively rated depression, positive or negative psychotic symptom ratings, or cognitive performance scores. CONCLUSIONS: These pilot data partially support the hypothesis that antiglucocorticoids reduce depressive symptoms in patients with schizophrenia and schizoaffective disorder, although objective and subjective ratings may not be similarly affected during a four-week course of treatment. Further studies with larger sample sizes, more extensive endocrine assessments and longer duration of drug administration seem warranted.
Assuntos
Antidepressivos/farmacologia , Antidepressivos/uso terapêutico , Antipsicóticos/uso terapêutico , Glucocorticoides/antagonistas & inibidores , Cetoconazol/farmacologia , Cetoconazol/uso terapêutico , Transtornos Psicóticos/tratamento farmacológico , Esquizofrenia/tratamento farmacológico , Adulto , Depressão/diagnóstico , Depressão/tratamento farmacológico , Método Duplo-Cego , Feminino , Humanos , Hidrocortisona/sangue , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: Previous research has linked maternal anemia during pregnancy with increased risk for schizophrenia in offspring. However, no study has sought to determine whether this early insult leads to a more severe form of the disorder, characterized by worsened motor and neurocognitive functioning. METHOD: Subjects were 24 cases diagnosed with schizophrenia and 22 controls from the Developmental Insult and Brain Anomaly in Schizophrenia (DIBS) study. Hemoglobin values were measured throughout pregnancy. Among offspring, psychiatric diagnoses were determined through semi-structured interviews and medical records review and comprehensive neurocognitive assessment batteries were conducted in adulthood. RESULTS: Results indicated that among cases decreases in maternal hemoglobin led to significant decreases in scores on the Grooved Pegboard test, the Finger Tapping test and the Wechsler Adult Intelligent Scales (WAIS) information subtest. In contrast, controls only exhibited decreases in performance on the California Verbal Learning Test (CVLT) long-delay recall after fetal exposure to lower hemoglobin. There were also significant interactions between hemoglobin and case status for all of the motor tasks. CONCLUSIONS: These findings support the hypothesis that fetal exposure to decreases in maternal hemoglobin is related to preferentially poorer neuromotor function among cases compared to controls, as well as general intellectual difficulties among cases. Controls were relatively unaffected by decreased maternal hemoglobin, which suggests that liability to schizophrenia renders cases susceptible to the deleterious influences of in utero exposure to decreases in maternal hemoglobin.
Assuntos
Anemia/complicações , Transtornos Cognitivos/complicações , Cognição , Hemoglobinas/análise , Complicações Hematológicas na Gravidez , Efeitos Tardios da Exposição Pré-Natal , Esquizofrenia/complicações , Adulto , Estudos de Casos e Controles , Estudos de Coortes , Feminino , Humanos , Masculino , Testes Neuropsicológicos , Gravidez , Índice de Gravidade de Doença , Escalas de WechslerRESUMO
BACKGROUND: We examined cognitive deficits before and after onset of schizophrenia in a longitudinal study that: 1) covers a long time interval; 2) minimizes test unreliability by including the identical measure at both childhood and post-onset cognitive assessments; and 3) minimizes bias by utilizing a population-based sample in which participants were selected neither for signs of illness in childhood nor for being at risk for schizophrenia. METHODS: Participants in the present study, Developmental Insult and Brain Anomaly in Schizophrenia (DIBS), were ascertained from an earlier epidemiologic study conducted in Oakland, CA. The original version of the Peabody Picture Vocabulary Test (PPVT), a test of receptive vocabulary, was administered at age 5 or 9 and repeated as part of the DIBS study at an average age of 40. There were 10 DIBS cases with DSM-IV schizophrenia or schizoaffective disorder and 15 demographically similar DIBS controls with both child and adult PPVT scores. RESULTS: Cases scored significantly lower than controls in childhood (d=0.95) and adulthood (d=1.67). Residualized scores indicating the number of SDs above or below one's predicted adult score revealed a mean case-control difference of -1.51SDs, consistent with significant relative decline over time among the cases (p<0.0013). CONCLUSIONS: In this prospective study, individuals who developed adult schizophrenia manifested impaired receptive vocabulary during childhood and further relative deterioration (or lack of expected improvement) between childhood and midlife. Limitations should also be acknowledged, including the small sample size and the fact that we cannot be certain when the continued deterioration took place.
Assuntos
Transtornos Cognitivos/etiologia , Transtornos Cognitivos/psicologia , Esquizofrenia/complicações , Psicologia do Esquizofrênico , Adulto , Estudos de Coortes , Deficiências do Desenvolvimento/fisiopatologia , Deficiências do Desenvolvimento/psicologia , Feminino , Humanos , Acontecimentos que Mudam a Vida , Masculino , Testes NeuropsicológicosRESUMO
BACKGROUND: Maternal infection during pregnancy has been repeatedly associated with increased risk for schizophrenia. Nevertheless, most viruses do not cross the placenta; therefore, the damaging effects to the fetus appear to be related to maternal antiviral responses to infection (e.g. proinflammatory cytokines). Fetal exposure to the proinflammatory cytokine interleukin-8 (IL-8) has been significantly associated with risk of schizophrenia in offspring. This study sought to determine the association between fetal exposure to IL-8 and structural brain changes among schizophrenia cases and controls. METHODS: Subjects were 17 cases diagnosed with schizophrenia from the Developmental Insult and Brain Anomaly in Schizophrenia (DIBS) study. Psychiatric diagnoses were determined among offspring with semi-structured interviews and medical records review. IL-8 was determined from assays in archived prenatal sera and volumetric analyses of neuroanatomical regions were obtained from T1-weighted magnetic resonance imaging in adulthood. Eight controls were included for exploratory purposes. RESULTS: Among cases, fetal exposure to increases in IL-8 was associated with significant increases in ventricular cerebrospinal fluid, significant decreases in left entorhinal cortex volumes and significant decreases in right posterior cingulate volumes. Decreases that approached significance also were found in volumes of the right caudate, the putamen (bilaterally), and the right superior temporal gyrus. No significant associations were observed among controls. CONCLUSION: Fetal exposure to elevations in maternal IL-8 led to structural neuroanatomic alterations among cases in regions of the brain consistently implicated in schizophrenia research. In utero exposure to elevations in IL-8 may partially account for brain disturbances commonly found in schizophrenia.
Assuntos
Encéfalo/patologia , Interleucina-8/efeitos adversos , Efeitos Tardios da Exposição Pré-Natal/etiologia , Efeitos Tardios da Exposição Pré-Natal/patologia , Adulto , Encéfalo/crescimento & desenvolvimento , Estudos de Coortes , Citocinas/metabolismo , Feminino , Humanos , Processamento de Imagem Assistida por Computador/métodos , Interleucina-8/líquido cefalorraquidiano , Imageamento por Ressonância Magnética/métodos , Masculino , Gravidez , Diagnóstico Pré-Natal/métodos , Efeitos Tardios da Exposição Pré-Natal/líquido cefalorraquidiano , Esquizofrenia/tratamento farmacológicoRESUMO
OBJECTIVE: Psychomotor slowing is a common manifestation of traumatic brain injury. Previous electrophysiological studies of traumatic brain injury have focused on abnormal attentional and perceptual responses to incoming stimuli. We hypothesize that traumatic brain injury is also associated with abnormal cortical components of motor execution. DESIGN: To test this hypothesis, we analyzed event-related potentials of 22 subjects (11 with a history of severe traumatic brain injury and 11 age-matched healthy subjects) during oddball discrimination tasks. In addition to the usual stimulus-locked averaging of electrophysiological data to reveal cognitive components, such as the P300, we also analyzed subjects' response-locked data to reveal motor potential waveforms. To focus on generalized effects across modality, analyses were performed on composite measures from both auditory and visual event-related potentials. RESULTS: (1) Traumatic brain injury subjects had abnormal P300 responses (with reduced amplitude and prolonged latency) in both sensory modalities. (2) Traumatic brain injury subjects' motor potential waveforms showed significantly reduced amplitude in both sensory modalities. (3) Abnormalities in P300 latency, amplitude, and motor potential amplitude (effect sizes = 1.2-1.5 SD) were greater than behavioral slowing, as measured by reaction times (0.7 SD). (4) P300 latency and motor potential amplitude together accounted for much of the reaction time prolongation (r = 0.73). CONCLUSIONS: This study demonstrates the value of concurrently analyzing stimulus-locked and response-locked event-related potential data to evaluate cortical components of perceptual and motor processing. The present findings indicate that patients with traumatic brain injury have impairments in both the perceptual interpretation of incoming stimuli and the execution of motor responses and that both abnormalities contribute to psychomotor slowing in patients with traumatic brain injury.
Assuntos
Atenção , Lesões Encefálicas/fisiopatologia , Córtex Cerebral/fisiopatologia , Potenciais Somatossensoriais Evocados , Processos Mentais , Córtex Motor/fisiopatologia , Percepção , Tempo de Reação , Adolescente , Adulto , Estudos de Casos e Controles , Feminino , Indicadores Básicos de Saúde , Humanos , Masculino , Pessoa de Meia-Idade , Desempenho Psicomotor , Fatores de Tempo , Adulto JovemRESUMO
OBJECTIVE: Executive dysfunction is one of the most prominent and functionally important cognitive deficits in schizophrenia. Although strong associations have been identified between executive impairments and structural and functional prefrontal cortical deficits, the etiological factors that contribute to disruption of this important cognitive domain remain unclear. Increasing evidence suggests that schizophrenia has a neurodevelopmental etiology, and several prenatal infections have been associated with risk of this disorder. The authors examined whether prenatal infection is associated with executive dysfunction in patients with schizophrenia. METHOD: The authors assessed the relationship between serologically documented prenatal exposure to influenza and toxoplasmosis and performance on the Wisconsin Card Sorting Test and the Trail Making Test, part B (Trails B), as well as other measures of executive function, in 26 patients with schizophrenia from a large and well-characterized birth cohort. RESULTS: Patients who were exposed to infection in utero committed significantly more total errors on the Wisconsin Card Sorting Test and took significantly more time to complete the Trails B than unexposed patients. Exposed patients also exhibited deficits on figural fluency, letter-number sequencing, and backward digit span. CONCLUSIONS: Prenatal infections previously associated with schizophrenia are related to impaired performance on the Wisconsin Card Sorting Test and Trails B. The pattern of results suggests that cognitive set-shifting ability may be particularly vulnerable to this gestational exposure. Further work is needed to elucidate the specificity of prenatal infection to these executive function measures and to examine correlates with neuroanatomic and neurophysiologic anomalies.
Assuntos
Transtornos Cognitivos/epidemiologia , Doenças Transmissíveis/epidemiologia , Influenza Humana/epidemiologia , Efeitos Tardios da Exposição Pré-Natal/epidemiologia , Esquizofrenia/epidemiologia , Toxoplasmose/epidemiologia , Adulto , Transtornos Cognitivos/diagnóstico , Feminino , Doenças dos Genitais Femininos/epidemiologia , Humanos , Imunoglobulina G/imunologia , Influenza Humana/imunologia , Idade Materna , Testes Neuropsicológicos , Gravidez , Estudos Prospectivos , Esquizofrenia/diagnóstico , Índice de Gravidade de Doença , Toxoplasmose/imunologiaRESUMO
Borderline personality disorder (BPD) is a paradigmatic disorder of adult attachment, with high rates of antecedent childhood maltreatment. The neurocognitive correlates of both attachment disturbance and maltreatment are both presently unknown in BPD. This study evaluated whether dimensional adult attachment disturbance in BPD is related to specific neurocognitive deficits, and whether childhood maltreatment is related to these dysfunctions. An outpatient BPD group (n=43) performed nearly 1 SD below a control group (n=26) on short-term recall, executive, and intelligence functions. These deficits were not affected by emotionally charged stimuli. In the BPD group, impaired recall was related to attachment-anxiety, whereas executive dysfunction was related to attachment-avoidance. Abuse history was correlated significantly with executive dysfunction and at a trend level with impaired recall. Neurocognitive deficits and abuse history exhibited both independent and interactive effects on adult attachment disturbance. These results suggest that (a) BPD patients' reactivity in attachment relationships is related to temporal-limbic dysfunction, irrespective of the emotional content of stimuli, (b) BPD patients' avoidance within attachment relationships may be a relational strategy to compensate for the emotional consequences of frontal-executive dysregulation, and (c) childhood abuse may contribute to these neurocognitive deficits but may also exert effects on adult attachment disturbance that is both independent and interacting with neurocognitive dysfunction.