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PubMed2002

Standard measures of executive function in predicting instrumental activities of daily living in older adults.

OBJECTIVE: The purpose of this study was to examine the ability of specific, commonly used neuropsychological tests of executive function to predict functional status among a group of elderly subjects. METHODS: Fifty study participants underwent a brief neuropsychological evaluation of executive functions and assessment of instrumental activities of daily living (IADL). RESULTS: A multiple stepwise regression analysis indicated that executive function tests accounted for 54% of the variance in functional status. An examination of the standardized regression coefficients revealed that Trail Making Test-Part B and the Wisconsin Card Sorting Test were the only two of the five executive function tests that significantly predicted functional status. These executive function measures contributed significantly to the prediction of functional status even after statistically controlling for age, sex, and education. CONCLUSION: Thus, the common clinical measures of executive function are useful in predicting functional status in older adults.

Activities of Daily Living↗
PubMed1998

Neuropsychologic changes after coronary artery bypass grafting: use of reliable change indices.

BACKGROUND: A method of defining change in neuropsychologic test scores that accounts for test reliability and practice effects was applied to determine accurately the incidence of acquired neuropsychologic deficits after coronary artery bypass grafting. METHODS: Neuropsychologic assessment was performed on 50 patients before and at 7 days after either hypothermic or normothermic coronary artery bypass grafting. From a matched control group of 24 normal subjects who were examined twice over a similar interval, reliable change indices that controlled for measurement error and practice effects were calculated for each neuropsychologic measure. With the use of these indices, the incidence of postoperative decline among the study patients was determined. For comparison, the incidence of decline using the "one standard deviation" criterion also was calculated. RESULTS: Comparing the reliable change and standard deviation methods, statistically significant differences in the incidence of decline were observed in 5 of 11 neuropsychologic measures. The reliable change method identified more patients with neuropsychologic deficits on most measures. CONCLUSIONS: The control of measurement error and practice effects can alter significantly the calculated incidence of neuropsychologic impairment after coronary artery bypass grafting.

Aged↗
PubMed2001

Cognitive functions of young adults who survived childhood cancer.

Neuropsychological tests were used to determine the cognitive functioning of adult long-term survivors treatedfor childhood cancer Disease onset before the age of 5 was related to lower test scores in intelligence tests, several memory tests, and motor function tests. The cranial irradiated survivors displayed more difficulties, especially in short-term memory tests and the Wechsler Adult Intelligence Scale Digit Symbol Test as compared to nonradiated survivors. No statistically significant differences in test scores were observed between different forms of cancer The results of this study are consistent with the notion that those memory types that demand special attention and motor speed functions are especially vulnerable to cancer and its treatment.

Adolescent↗
PubMed1997

Use of a sequencing task designed to stress the supervisory system in schizophrenic subjects.

BACKGROUND: We investigated whether schizophrenic subjects are impaired in non-routine behaviour because of the dysfunction of a general executive component labelled, in neuropsychological terms, the supervisory system. METHODS: A specific verbal sequencing test was designed for this purpose. Subjects had to perform sequential reasoning with verbal material. Each test sequence consisted of a series of words presented in jumbled order. The construction of some sequences had to be done using familiar routine associations (valid conditions). In contrast, some other sequences required the overriding selection of familiar routine associations, which were inappropriate within the general context of the task (invalid conditions). Twenty verbal sequences (10 valid-10 invalid) were administered. Thirty-seven DMS-IV schizophrenic patients and 21 normal volunteers matched for age and educational level were recruited. RESULTS: Compared to the control group the schizophrenic group was impaired in both valid and invalid conditions. The number of 'capture errors' specific to supervisory system failure was significantly higher in the schizophrenic group and only the schizophrenic patients had significantly fewer correct sequences in invalid conditions than in valid conditions. Poor performance in invalid conditions alone was observed only among the schizophrenic subjects without a general cognitive defect. CONCLUSIONS: These findings suggest that sequencing procedures requiring an executive input are impaired in schizophrenia.

Adult↗
PubMed1993

Contrasts between patients with affective disorders and patients with schizophrenia on a neuropsychological test battery.

OBJECTIVE: This study was designed to ascertain the degree and specificity of cognitive impairments in patients with schizophrenia and patients with affective disorders. METHOD: Cognitive function was assessed with a neuropsychological test battery in consecutively admitted patients with schizophrenia (N = 57), unipolar depression (N = 29), and bipolar disorder (N = 16). RESULTS: The performance of the schizophrenic group was significantly below that of the groups with affective disorders on measures of attention and psychomotor speed, verbal and visual memory, and problem solving and abstraction. IQ was lower in the schizophrenic group and appeared to have deteriorated from a normal premorbid level that was not different from that of the affective disorder groups, as determined by the Wide Range Achievement Test--Revised reading test, a putative measure of premorbid intelligence. When IQ was controlled, differences between the groups in problem solving and visual memory remained. Psychiatric symptoms had a larger impact on test performance in the affective disorder groups than in the schizophrenic group. CONCLUSIONS: These results suggest that patients with schizophrenia perform systematically worse on cognitive measures than patients with affective disorders, which is consistent with their generally poorer outcome. The results also indicate that schizophrenia and affective disorders are qualitatively distinguishable in neuropsychological terms, given differences in apparent intellectual deterioration, profiles of cognitive impairment, and associations between cognitive performance and psychopathology.

Adult↗
PubMed2001

Convergent validity and neuropsychological correlates of the schedule for the assessment of negative symptoms (SANS) attention subscale.

Cognitive deficits have come to be viewed as a hallmark feature of schizophrenic illness. Although laboratory based assessment of patients' cognitive deficits has been well investigated, few studies to date have examined the utility of clinical ratings of cognitive symptoms using the Schedule for the Assessment of Negative Symptoms (SANS) attention subscale. In this report, we examined the convergence between clinical ratings of cognitive impairment using the SANS attention subscale and performance on a variety of neurocognitive tests designed to measure attentional impairment, as well as other cognitive constructs such as working memory and executive functioning. A total of 56 acute schizophrenic inpatients were clinically rated with the SANS and completed the Continuous Performance Test, Digit Span Distraction Test, Wisconsin Card Sorting Task, and the Trailmaking Test. A series of correlational and regression analyses were conducted to test the concurrent and discriminant validity of the SANS attention subscale. Performance measures of attention, but not working memory or executive functioning, were significantly correlated with and moderately predicted the severity of SANS rated inattention. Additionally, the attention subscale was discriminated from the other SANS negative symptom subscales in predicting a laboratory measure of attentional functioning. The SANS attention subscale demonstrated both concurrent and discriminant validity. These data indicate that attentional dysfunction in schizophrenia can be meaningfully rated and interpreted using the SANS.

Adolescent↗
PubMed1996

Effect of overtime work on cognitive function in automotive workers.

OBJECTIVE: The present investigation examined whether increased overtime work predicts impairment in cognitive performance in the domains of attention, executive function, and mood. METHODS: The behavioral and cognitive functions of 248 automotive workers were measured by a neurobehavioral test performance. Overtime, defined as number of hours worked greater than 8 h a day or greater than 5 d a week, was calculated from company payroll records for the week before the test day. The number of consecutive days worked before the test day was also determined. RESULTS: Cross-sectional data analysis by multiple linear regression, after adjustment for the effects of age, education, gender, alcohol intake, repeated grade in school, acute petroleum naphtha exposure, shift worked, job type, number of consecutive days worked before the test day, and number of hours worked on the test day before the testing, demonstrated that increased overtime was significantly associated with impaired performance on several tests of attention and executive function. Increased feelings of depression, fatigue, and confusion were also associated with increased overtime work. In addition significant interaction effects were observed for job type but not for naphtha exposure. CONCLUSIONS: The findings support the hypothesis that overtime work results in impaired cognitive performance in the areas of attention and executive function and that both overtime hours and the number of consecutive days worked prior to a test day affect mood.

Adult↗
PubMed2006

Deficits in visual functions and neuropsychological inconsistency in Borderline Personality Disorder.

For Borderline Personality Disorder (BPD) cognitive and perceptual impairments were reported in some but not all studies. The aim of the present study was to analyze the neuropsychological performance of BPD patients in different domains. Predominant impairments of visual functions and an increased intra-individual variation of test performances within neuropsychological domains were expected. We investigated 22 patients with BPD and a matched sample of 22 healthy control subjects. A comprehensive clinical and neuropsychological test battery was administered. Effect sizes indicate primarily deficits of visual functions such as visual memory (Wechsler Memory Scale-Revised, WMS-R: Visual pair associates and visual reproduction, Complex Figure Test: Recall) and visuo-spatial abilities (Leistungspruefsystem, LPS 9 and 10: Spatial imagination and embedded figures), but also of executive functions (Tower of Hanoi, Trail Making Test-B, semantic and figural fluency, LPS 4: Reasoning). In addition, the intra-individual ranges of neuropsychological test results in BPD patients were increased compared to those of healthy subjects. This finding might be due to a high degree of temporary stress that interferes with effective cognitive processing. Further research is needed to confirm the present results and to control for stress during the test procedure.

Adult↗
PubMed2005

Executive functions and methylphenidate response in subtypes of attention-deficit/hyperactivity disorder.

BACKGROUND: Oculomotor tasks are a well-established means of studying executive functions and frontal-striatal functioning in both nonhuman primates and humans. Attention-deficit/hyperactivity disorder (ADHD) is thought to implicate frontal-striatal circuitry. We used oculomotor tests to investigate executive functions and methylphenidate response in two subtypes of ADHD. METHODS: Subjects were boys, aged 11.5-14 years, with ADHD-combined (n = 10), ADHD-inattentive (n = 12), and control subjects (n = 10). Executive functions assessed were motor planning (tapped with predictive saccades), response inhibition (antisaccades), and task switching (saccades-antisaccades mixed). RESULTS: The ADHD-combined boys were impaired relative to control subjects in motor planning (p < .003) and response inhibition (p < .007) but not in task switching (p > .92). They were also significantly impaired relative to ADHD-inattentive boys, making fewer predictive saccades (p < .03) and having more subjects with antisaccade performance in the impaired range (p < .04). Methylphenidate significantly improved motor planning and response inhibition in both subtypes. CONCLUSIONS: ADHD-combined but not ADHD-inattentive boys showed impairments on motor planning and response inhibition. These deficits might be mediated by brain structures implicated specifically in the hyperactive/impulsive symptoms. Methylphenidate improved oculomotor performance in both subtypes; thus, it was effective even when initial performance was not impaired.

Adolescent↗
PubMed2004

Relationship of affect recognition with psychopathology and cognitive performance in schizophrenia.

The purpose of the present study was to explore the relationship between emotion perception and both psychopathology and cognitive functioning in a group of Greek patients with schizophrenia. Thirty-five patients with schizophrenia were assessed with computerized tests of emotion perception, using visual faces (Kinney's Affect Matching Test, KAMT), prosody (Affective Prosody Test, APT), and visual everyday scenarios (Fantie's Cartoon Test, FCT), as well as a facial recognition test (Kinney's Identity Matching Test, KIMT). The patients were also evaluated with the symptoms dimensions derived from the PANSS (positive, negative, cognitive, depression, and excitement) and a battery of neuropsychological tests measuring executive functions, attention, working memory, verbal and visual memory, visuospatial ability, and visual scanning/psychomotor speed. The three emotion perception and face recognition tests correlated significantly with each other. The KAMT was significantly related to the cognitive symptoms dimension of the PANSS and executive functions. The FCT was significantly related to level of education and attention. Finally, the APT was significantly related to the cognitive symptoms dimension, executive functions, and attention. Our findings regarding the significant relationships of affect perception, both facial and vocal, as well as in everyday scenarios, with several cognitive abilities support the notion that deficits in decoding affective information in schizophrenia could be attributed to impairment in more basic neurocognitive domains.

Adult↗
PubMed2002

A case study of pure word deafness: modularity in auditory processing?

AL, a woman with an acquired disturbance of auditory processing beginning in the second decade, was originally diagnosed as having pure word deafness. Recent analysis with a wide range of stimuli suggests that her comprehension deficit also extends to a subset of musical and non-verbal environmental sounds. The perceptual demands of the different auditory stimuli appear to account for part of the apparent material specificity. Additionally, over the years, the presumed temporal lobe cortical pathology has been supplemented by a mild to moderate, peripheral low-frequency hearing loss and evidence of dysfunction in lower level auditory processing pathways. The current peripheral dysfunction closely resembles cases recently labeled as auditory neuropathy. The diagnosis of pure word deafness should not be based on a limited set of auditory stimuli; additionally, a careful assessment using modern audiological techniques should be performed to evaluate peripheral auditory functions.

Achievement↗
PubMedDate not supplied

Prospective study of brief neuropsychological measures to assess crash risk in older primary care patients.

BACKGROUND: Practicing primary care physicians often encounter the difficult clinical situation of evaluating the older driver. We wanted to investigate the relation between self-reported driving behavior, neuropsychological measures, and crash risk to inform the development of a test battery that could predict unsafe driving behavior and was feasible for use by primary care physicians. METHODS: This study was a prospective follow-up of 107 drivers aged 65 years and older recruited from a primary care setting in 1995. Tests of attention, visual information processing, spatial orientation, and general mental status were administered at baseline. At baseline and after 2 years of follow-up, patients were asked about their driving history using the driving questionnaire. Risk for reported crashes in the follow-up period was assessed in relation to baseline driving history and measures of cognition. RESULTS: Baseline self-reports of driving habits and attitudes were associated with an increased risk of reporting a crash after 2 years of follow-up (relative risk ratio = 5.31; 95% confidence interval [CI], 0.63, 44.63). In addition, baseline tests of attention, visual information processing, and spatial orientation were associated with an increased risk of reporting motor vehicle crash at follow-up. For example, respondents with poor performance on the Trail Making Test-part A, were almost four times more likely to report a crash at follow-up (risk ratio = 3.15; 95% CI, 0.76, 13.07). CONCLUSION: Although our conclusions are tempered by small sample size, this preliminary study suggests that brief cognitive tests and simple questions about driving habits warrant further investigation as indicators of crash risk with potential utility for assessing older drivers in primary care.

Accidents, Traffic↗
PubMedDate not supplied

Directed attention in normal and high-risk pregnancy.

OBJECTIVE: To compare the ability to direct attention in women having a high-risk pregnancy with those having an uncomplicated pregnancy. DESIGN: Descriptive comparative. SETTING: A tertiary-care hospital. PARTICIPANTS: Women in the 3rd trimester of pregnancy receiving care from perinatologists were recruited for this study and comprised the high-risk group (n = 67). Women in their 3rd trimester of pregnancy with uncomplicated pregnancies and enrolled in prenatal classes were the comparison group (n = 57). MAIN OUTCOME MEASURES: Objective measures of directed attention included digit span forward, digit span backward, Trailmaking A, and Trailmaking B. Subjective measures included the Attentional Function Index and Mental Effort in Tasks. RESULTS: Women having a complicated pregnancy had significantly more difficulty directing attention on all measures than women having normal pregnancies. When all covariates were considered, women having a high-risk pregnancy had significantly more difficulty directing attention as measured by Trailmaking A, Trailmaking B, and Mental Effort in Tasks. CONCLUSIONS: Women having high-risk pregnancies may have more difficulty with activities that require directed attention than women having normal pregnancies. Learning new information and skills, problem solving, and planning may require additional effort for women having complicated pregnancies.

Adaptation, Psychological↗
PubMed1984

Does the diagnosis of depression in head and neck cancer mask organic brain disease?

Scant attention has been paid to emotional changes as possible symptoms of impaired cerebral functioning in cancer patients. A retrospective study was conducted to determine the variety of organic brain syndromes (OBS) that presented with depressive symptoms in 20 head and neck cancer patients. The impressions of referring surgeons were in error in 16 patients (80%). Twelve (60%) had unsuspected OBS, with treatment resulting in reversal of symptoms in almost half. Of the eight patients with functional disorders, four received a final diagnosis of depression. Head and neck surgeons should be aware that (1) emotional changes in their patients frequently reflect OBS, some potentially reversible, (2) because of the ages of the patients, senile dementia may be a more common occurrence in head and neck cancer than suspected, and (3) because of the difficulties of evaluating changes in higher mental functions, more neuropsychiatric consultations may be warranted for head and neck patients.

Aged↗
PubMed2006

Older adults in the SeniorWISE study at risk for mild cognitive impairment.

As part of a larger clinical trial, SeniorWISE (Wisdom Is Simply Exploration), this study provides baseline affective, cognitive, and functional ability data and reports on the likely incidence of mild cognitive impairment (MCI) in a tri-ethnic community sample of older adults (N = 265). Seventy-eight individuals had memory complaints, whereas 105 had none. Of the complainants, 32 had normal memory function and 46 had poor memory performance. Among those without memory complaints, 42 had no memory impairment and 63 had poor memory performance. Forty-six individuals (17%) met the criteria of poor everyday memory functioning and memory complaints whereas 81 (31%) would be considered to be at risk based on other MCI criteria. This pattern of results suggests that those with declining memory are less aware of their deficits in activities of daily living that their actual performance would suggest are occurring.

Activities of Daily Living↗