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Query: UMLS:C0036341 (schizophrenia)
 60,220 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This study examines the respective morbid risk for psychiatric illness determined by the family history method in the first-degree relatives of medical controls and patients with delusional disorder (paranoid psychosis) and schizophrenia. The morbid risk for schizophrenia and schizoid-schizotypal personality disorder was significantly greater in the relatives of the schizophrenic patients than in those of the delusional disorder or medical control patients, but no difference in the risk for affective illness or alcoholism was found in the three groups of relatives. Paranoid personality disorder was significantly more common in the relatives of the delusional disorder patients than in those of the medical controls. These results support the familial independence of delusional disorder and schizophrenia.
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PMID:Psychiatric illness in first-degree relatives of patients with paranoid psychosis, schizophrenia and medical illness. 407 47

The establishment of the new diagnostic category, Schizotypal Personality Disorder (SPD), has stimulated biological studies of patients with this disorder. Such studies offer the potential of better understanding the diagnosis and treatment of SPD as well as more clearly defining the boundaries of the schizophrenic disorders. SPD has been studied in the clinical setting, in family studies of schizophrenia, and in the biological high-risk paradigm. In most cases, biological variables associated with schizophrenia have been evaluated. Decreased activities of plasma amine oxidase and platelet monoamine oxidase have been associated with SPD in the families of schizophrenics and in "biological high-risk" studies. Smooth pursuit eye movement (SPEM) impairment has also been associated with SPD in a "biological high-risk" study of college students. Inferior backward masking performance has been demonstrated in SPD patients in the clinical setting. Other studies using psychophysiological measures have been applied to subjects with psychological characteristics similar to DSM-III SPD and found biological abnormalities similar to those reported in schizophrenia. These studies are consistent with the possibility that some individuals with SPD may share common psychobiological abnormalities with schizophrenic individuals and may sharpen our understanding of SPD and its relationship to schizophrenia.
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PMID:Biological markers in schizotypal personality disorder. 408 50

Schizotypal personality (SP) corresponds closely to the concept from which it was derived, "borderline schizophrenia," and represents, in most instances, the intermediate band of the schizophrenia spectrum. Problems often encountered in patients with SP include eccentric social habits, anhedonia, hypersensitivity to criticism, humorlessness, misinterpretation of the moods and statements of others, and inability to fit in socially. While neuroleptic medication may be useful during brief psychotic episodes (to which many patients with SP are prone), the mainstays of treatment are verbal psychotherapies. The chronicity of the condition calls for long-term therapy. An exploratory technique alone seldom suffices; therapy must also include supportive and social-reeducative measures. Modification of socially alienating mannerisms through group therapy and behavioral interventions is often warranted, in addition to one-to-one psychotherapy.
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PMID:Schizotypal personality: psychotherapeutic aspects. 408 51

In spite of the pressure for consensus that operational diagnoses exert, there remains considerable disagreement concerning the marginal syndromes which may be subtypes of schizophrenia or phenomenologically or genetically related. Some clarification of the question may result by returning to Bleuler's "latent schizophrenia," which he observed in the relatives of schizophrenics. Schizotypal personality disorder of DSM-III is only a first approximation of this, and its deficits in this respect are discussed briefly.
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PMID:Schizotypal personality disorder: an operational definition of Bleuler's latent schizophrenia? 408 52

Previous studies by the author and his collaborators, Rosenthal, Wender, Schulsinger, and Jacobsen, of the biological and adoptive relatives of schizophrenic adoptees are reviewed in conjunction with more recent studies by Spitzer and Endicott and by Kendler, Gruenberg, and Strauss, who independently made operational diagnoses using the Research Diagnostic Criteria or DSM-III specifications, both of which showed good agreement with the authors' global diagnoses based on the descriptions in DSM-II. Both the DSM-III diagnoses and the authors' global diagnoses found a highly significant concentration of chronic, latent, and uncertain schizophrenia or schizotypal personality disorder in the biological relatives of adoptees who developed chronic schizophrenia. A response is made to recent criticisms published in this journal by Lidz and Blatt and by Abrams and Taylor.
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PMID:Mental illness in the biological and adoptive relatives of schizophrenic adoptees: findings relevant to genetic and environmental factors in etiology. 634 26

Segregation analysis was applied to 79 nuclear families ascertained through chronic schizophrenic probands. Analysis was performed on the diagnosis of schizophrenia alone and on schizophrenia and schizotypal personality disorder (milder phenotype) combined. The models used were the transmission probability model and the mixed model. Because the disease is associated with reduced fertility, all likelihoods were calculated conditional on parental phenotypes. However, compatibility of the mating-type distribution predicted by each model with the observed was also examined. In all analyses, results suggested consistency with genetic transmission. In the analysis of schizophrenia alone, discrimination among models was difficult. In the analysis including the milder phenotypes, all single-locus models without polygenic background were excluded, while pure polygenic inheritance could not be eliminated. The polygenic model also gave good agreement with supplementary observations (lifetime disease incidences, mating-type distribution, and monozygotic twin concordance). The estimated components of variance for the polygenic model were: polygenes (H) 81.9%; common sib environment (B) 6.9%; random environment (R) 11.2%. Although the polygenic model was parsimonious, segregation analysis and the supplementary observations were also consistent with a mixed model, with a single major locus making a large contribution to genetic liability. Such a locus is more likely to be recessive than dominant, with a high gene frequency and low penetrance. The most likely recessive mixed model gave the following partition of liability variance: major locus, 62.9%; polygenes, 19.5%; common sib environment, 6.6%; and random environment, 11.0%.
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PMID:Segregation analysis of schizophrenia and related disorders. 649 72

Impaired smooth pursuit eye movement has been proposed as a possible biologic marker for schizophrenia. Preliminary studies have suggested that this impairment may be associated with social introversion and related psychopathology in a nonpsychiatric population. To evaluate the relationship between dysfunctional smooth pursuit eye movement and schizophrenia-related psychopathology, the authors screened a new, volunteer sample of 284 male college students for eye tracking accuracy. Volunteers identified as low-accuracy trackers were significantly more likely to be diagnosed (blindly) as having a schizotypal personality disorder by DSM-III criteria than those identified as high-accuracy trackers. The authors suggest that disordered smooth pursuit eye movement may reflect a vulnerability marker for schizotypal personality disorder.
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PMID:Impaired smooth pursuit eye movement: vulnerability marker for schizotypal personality disorder in a normal volunteer population. 650 60

The types and expectancy of mental disorders in the siblings of 74 probands with chronic schizophrenia were examined. The siblings were classified according to whether 1) both parents had schizotypal personality disorder, 2) one parent had the disorder and one was normal, or 3) both parents were normal. Siblings whose parents both had the disorder were at significantly greater risk for schizophrenia and schizotypal personality disorder than siblings with at least one normal parent. Similarly, the expectancy of schizotypal personality disorder alone and combined with schizophrenia was higher among siblings with one parent with the disorder than in siblings with two normal parents. The data suggest that schizotypal traits may be genetically related to schizophrenia.
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PMID:Familial relatedness of schizophrenia and schizotypal states. 662 88

A total of 437 acute psychiatric inpatients were investigated with the help of a questionnaire containing DSM-III diagnostic criteria for schizotypal as well as for borderline personality disorder and criteria of the Flexible System for the diagnosis of schizophrenia. All patients were also independently diagnosed according to the ICD-9. The clinical ICD-9 diagnoses were compared with the diagnoses given on the basis of the three operational criteria sets mentioned. Patients fulfilling the operational criteria for schizotypal personality disorder were clinically diagnosed as mostly schizophrenic, and there was also a considerable overlap between the two groups of patients, those fulfilling the operational criteria for schizotypal personality disorder and those fulfilling the criteria of the Flexible System for the diagnosis of schizophrenia. Schizotypal personality disorder does not seem to be a clinical entity in the sense of a traditional personality disorder. The majority of patients diagnosed as borderline personality disorder received a clinical diagnosis of a personality disorder. The DSM-III criteria of borderline personality disorder discriminated satisfactorily against schizophrenia as diagnosed by the Flexible System and as diagnosed according to ICD-9. On the other hand, there was no relationship between the borderline personality disorder diagnosis and any single of the ICD-9 personality disorder types. The patients fulfilling the criteria of the borderline personality disorder were equally distributed across all ICD-9 personality disorder types. They were also significantly younger than both the non-borderline and the ICD-9 personality disorder patients. The relationship between borderline personality disorder criteria and age might thus be of a greater relevance than the relationship between these criteria and a clinical type.
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PMID:Diagnosing borderline. A contribution to the question of its conceptual validity. 665

Estimation of short time intervals by 60 healthy subjects, 50 patients with schizophrenic disorders, and 8 with schizotypal personality disorders, was investigated using the three different methods, adjusting a metronome, verbal estimation, and operative estimation (production). The schizophrenic patients tended to over-estimate time with all three methods. Overestimation was also found when longer intervals were studied. Patients with different types of schizophrenic disorders, classified according to DSM-III criteria, over-estimated time about the same; no significant differences were found. Different courses of schizophrenia were also studied. Patients in remission over-estimated time to the same extent as chronic patients; the subchronic patients probably over-estimated less. Schizotypal personality disorders did not seem to be associated with a tendency to over-estimate short time intervals. The results were discussed in the context of perceptual disturbances in schizophrenic disorders.
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PMID:Estimation of time and the subclassification of schizophrenic disorders. 666 72


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