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At least 271 records · Page 15Linked to original sources
PubMed2003

Pattern of cognitive dysfunction in depressive patients during maintenance electroconvulsive therapy.

BACKGROUND: Objective data regarding adverse cognitive deficits associated with maintenance electroconvulsive therapy (M-ECT) are lacking. This study examined the cognitive state of depressive patients during M-ECT. METHOD: A cross-sectional study was carried out in 11 depressive patients in remission, all with a DSM-IV diagnosis of major depressive disorder. The mean number of previous ECT sessions was 36.1, and the mean intersession interval was 52.7 days. A group of 11 patients who had not received ECT was selected for comparison and matched for diagnosis, sex, age and years of schooling. All subjects were assessed using a complete neuropsychological battery including memory, attention and frontal function tests. RESULTS: Groups did not present differences in long delay verbal recall. Encoding of new information and results on the frontal function tests were significantly lower in the M-ECT patients. CONCLUSION: Depressed patients preserve long-term memory, but suffer short-term memory impairment and frontal function alteration during M-ECT. Further longitudinal studies are necessary to determine the influence of M-ECT on non-memory functions and different memory subtypes.

Cognition Disorders↗
PubMed1999

Is cardiopulmonary bypass still the cause of cognitive dysfunction after cardiac operations?

OBJECTIVE: The purpose of this study was to determine whether cognitive impairment is related to cardiopulmonary bypass. METHODS: Twenty-five patients undergoing coronary artery bypass grafting without cardiopulmonary bypass were matched with 50 patients undergoing coronary artery bypass grafting with cardiopulmonary bypass. All patients received the same anesthetic regimen, and one surgeon performed all the operations. A battery of 10 standard tests of neuropsychologic function were performed before, at discharge, and 3 months after the operation. A comprehensive multidimensional measure of subjective health status was used as the primary clinical measure of functional outcome. RESULTS: The groups were similar with respect to age, sex, and ventricular function and differed only in the need for a circumflex artery graft. Both groups showed significant improvement in the comprehensive multidimensional measure of subjective health status at 3 months. At discharge most neuropsychologic tests had deteriorated in both groups (the same 4 tests had deteriorated significantly in both groups, and an additional test had deteriorated significantly in the cardiopulmonary bypass group). At 3 months all but one test in the cardiopulmonary bypass group had returned to or exceeded baseline performance. The same 2 tests had improved significantly in both groups, and a further test had improved significantly in the group without cardiopulmonary bypass. At no specific time point was there a significant difference between the absolute or change scores between the groups on any of the tests. CONCLUSIONS: The similar pattern of early decline and late recovery of cognitive function in patients undergoing coronary artery bypass grafting with and without cardiopulmonary bypass suggests that cardiopulmonary bypass is not the major cause of postoperative cognitive impairment. This merits consideration in deciding optimal treatment strategies in coronary revascularization.

Cardiopulmonary Bypass↗
PubMed2002

Cognitive dysfunction in adult males with non-syndromic clefts of the lip and/or palate.

Cognitive deficits have been well-documented in children with non-syndromic clefts of the lip and/or palate. However, no study to date has formally assessed cognition in adults with oral clefts. This study was designed to evaluate neuropsychological functioning in adult males with non-syndromic clefts of the lip and/or palate (n=50) compared to age and sex-matched controls. Subjects with oral clefts were found to have significantly lower full scale IQ, performance IQ and verbal IQ scores compared to their matched controls. After controlling for IQ, patients showed specific deficits in verbal fluency. Adult males with oral clefts manifest a specific pattern of cognitive deficits. As the development of the face is highly interdependent with the development of the brain, it is theorized that the etiology of these cognitive deficits is a primary problem with abnormal brain development.

Cleft Lip↗
PubMedDate not supplied

Can music alleviate cognitive dysfunction in schizophrenia?

It has recently been reported that students performed relatively better on cognitive tasks after listening to music. Conceivably, music might reduce the level of arousal in subjects who are tense, thereby improving their performance. A test case would be schizophrenic subjects, noted for poor performance on tasks demanding attention, who have been characterized as suffering from hyperarousal, which mediates these attentional deficits. We investigated whether cognitive task performance could be facilitated by music in schizophrenics and report a beneficial effect.

Adult↗
PubMed2002

Cognitive dysfunction in recovered depressive patients with silent cerebral infarction.

In this study, we characterized cognitive functioning in patients with major depression and silent cerebral infarction (SCI), as detected by magnetic resonance imaging (MRI), after they had recovered from depression. Thirty-five patients with unipolar depression who experienced the onset of depression after the age of 50 underwent MRI and were classified as SCI(+) (n = 17) or SCI(-) (n = 18). The Wechsler Adult Intelligence Scale-Revised (WAIS-R) and the Uchida-Kraepelin psychodiagnostic test were administered after the patients had recovered from depression. In addition, the intelligence quotient (IQ) and mental speed of the patients in the two groups were compared. The total, verbal and performance IQ scores, as determined by the WAIS-R, were significantly lower in the SCI(+) group than in the SCI(-) group. The mental speed of patients in the SCI(+) group, as assessed by the Uchida-Kraepelin psychodiagnostic test, was almost half that of the SCI(-) group. Our findings provide further evidence that a comprehensive impairment of cognitive functioning, especially a severe reduction in mental speed, remains after recovery from depression in patients with major depression and SCI.

Aged↗
PubMed1998

Visuo-cognitive dysfunctions in Parkinson's disease.

Loss of will, decreased activity, and poverty of behavior are among the common symptoms observed in Parkinson's disease (PD). In line with these clinical observations, PD patients display prominent deficit in neuropsychological tests, requiring self-generated and effort-demanding operations. However, recent evidence suggests that this impairment is not generalized: visuo-spatial working memory and attentional set-shifting seem to be selectively impaired in the early stages of the disease. Electrophysiological studies also demonstrate the dysfunction of higher-level visual information processing. In this article, we discuss some current results to show the connection between clinical symptoms and neuropsychological deficits. We also consider dysfunction in underlying neural mechanisms, with particular emphasis on the dysregulation of fronto-striatal circuits. However, it is conceivable that visuo-cognitive impairment in PD reflects dysfunction of neural assemblies, involving basal ganglia, dorsal visual stream, and frontal-prefrontal circuits.

Attention↗
PubMed1996

Cognitive dysfunction in schizophrenia: comparison of treatment with atypical antipsychotic agents and conventional neuroleptic drugs.

Impaired cognitive function is both a feature of schizophrenia and a side effect of conventional neuroleptics. Maze tests were used to determine the effects on cognition of conventional dopamine antagonist neuroleptics (haloperidol and fluphenazine) and the newer serotonin-dopamine antagonist antipsychotics (risperidone and clozapine). Patients on clozapine or risperidone showed better performance on the maze tasks than untreated patients or patients taking conventional neuroleptics. In particular, patients treated with risperidone or clozapine were better able to maintain motor coordination while they focused on the more complex "frontal" maze tasks which required sequencing and planning. In view of the restrictions on the use of clozapine, it is suggested that risperidone should be more widely used in schizophrenia because it preserves cognitive function better than conventional neuroleptics and is therefore likely to allow patients to have better insight into their illness and to have better long-term quality of life expectations.

Clozapine↗
PubMed1996

P2 flash visual evoked response delay may be a marker of cognitive dysfunction in healthy elderly volunteers.

In an earlier study, 31 healthy elderly volunteers had normal cognitive function as measured by the Mini-Mental State Examination. Twenty-seven returned for further memory testing using the Wechsler Memory Scale-Revised (WMS-R). The P2 latency of the flash visual evoked response was positively correlated with age (p = .0008), but was not significantly related to gender. Nine of these 27 putatively healthy subjects had a delayed P2, suggestive of dementia. Although unaware of any memory deficits, 5 of the 27 had WMS-R Visual Memory Span percentile scores 1 or more standard deviations less than age-matched controls. Four of the five also had a significantly delayed P2 component. This positive correlation, adjusted for age, between poor Visual Memory Span performance and a delayed P2 was statistically significant (p < .025). These findings suggest that a delayed P2 in putatively healthy subjects is indicative of a visuospatial deficit which might be a precursor of dementia later.

Aged↗
PubMed2000

Cognitive dysfunctions and white matter lesions in patients with bipolar disorder in remission.

OBJECTIVE: To compare cognitive functioning in relation to white matter lesions in bipolar disorder in remission and schizophrenia. METHOD: Cognitive performance and the occurrence of white matter lesions on MRI images of the brain were assessed in 22 patients with bipolar disorder in remission, 22 patients with schizophrenia and 22 healthy volunteers. RESULTS: Performance of tests of memory, speed and cognitive flexibility was significantly impaired in both patient groups. The frequency of white matter lesions did not differ significantly between the three groups. No differences in cognitive performance were found between patients with white matter lesions and patients without such lesions. CONCLUSION: White matter lesions apparently do not underlie cognitive deficits that are found in patients with bipolar disorder in remission and in patients with schizophrenia.

Bipolar Disorder↗
PubMed2003

Neural correlates of clinical symptoms and cognitive dysfunctions in obsessive-compulsive disorder.

Although results from neuropsychological and neuroimaging studies have postulated the involvement of the frontal lobe and the subcortical brain regions in the pathophysiology of obsessive-compulsive disorder (OCD), neuroimaging studies have provided little evidence that cognitive abnormalities in patients with OCD are related to dysfunctions in these areas. This study was designed to determine whether the clinical features and cognitive deficits of OCD might be taken to reflect frontal-subcortical dysfunction. Fourteen patients with OCD and 14 case-matched normal subjects completed clinical and cognitive evaluation, including four sets of neuropsychological tests that assessed the executive functions and visual memory. Cerebral glucose metabolic rates were measured by using positron emission tomography (PET) with 18F-fluorodeoxyglucose. Behavioral and PET data were analyzed using statistical parametric mapping for group differences and behavioral-metabolic correlates. The right orbitofrontal cortex showed increased metabolic activity and the left parieto-occipital junction showed decreased metabolic activity in patients. Metabolism in the right hippocampus, the left putamen and the right parietal region was associated with the severity of obsessive-compulsive symptoms. Correlations between metabolic rates and neuropsychological test scores in the prefrontal cortex and the putamen occurred only in the patient group. These results suggest that patients with OCD have distinct features of brain metabolic activities for performing cognitive tasks as well as presenting obsessive-compulsive symptoms. In particular, the frontal-subcortical circuits might mediate not only symptomatic expression but also cognitive expression in patients with OCD.

Adult↗