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D M Svrakic

Publications and source records attributed to D M Svrakic.

18 recordsLinked to original sources
PubMed2002

Temperament, character, and personality disorders: etiologic, diagnostic, treatment issues.

OBJECTIVE: In this paper, we explore the underlying dimensional structure of personality disorder, propose a novel approach to its diagnosis, and outline our concepts of its etiology and treatment based on the seven factor psychobiological model of temperament and character. METHOD: Temperament and character traits were evaluated in a consecutive series of 109 psychiatric out-patients, with or without personality disorder and varying mood and anxiety states. RESULTS: Low scores on character dimensions consistently correlated with high symptom counts for personality disorder. Each subtype of personality disorder created a unique combination of correlations with the four temperament traits. CONCLUSION: Temperament and Character Inventory (TCI) temperament and character traits efficiently diagnose personality disorder and differentiate its individual subtypes. Character traits are used to diagnose the presence and the severity of personality disorder, whereas temperament traits are used for differential diagnosis. The distinction between temperament and character provides an attractive theoretical basis for etiological postulates and treatment of personality disorder.

Adolescent↗
PubMed2001

Linkage disequilibrium for schizophrenia at the chromosome 15q13-14 locus of the alpha7-nicotinic acetylcholine receptor subunit gene (CHRNA7).

The transmission/disequilibrium test was used for fine mapping of the linkage of schizophrenia to the chromosome 15q13-14 region, the site of a candidate gene, the alpha7 nicotinic acetylcholine receptor subunit gene (CHRNA7), in parent-child triads from the NIMH Schizophrenia Genetics Initiative families. This candidate gene was identified from neurobiological studies of deficits in schizophrenics of the inhibitory gating of the P50 auditory evoked potential. The neurobiological deficit was also used as a phenotype for subsequent linkage analysis. In the present study, significant genotype-wise disequilibrium (P < 0.007) was found at D15S165, a polymorphic simple sequence marker physically located within 1 megabase of both CHRNA7 and a partially duplicated, expressed sequence that includes exons 5-10 of CHRNA7. Replication of this result was found in an additional set of families. The results support this region as a chromosomal location involved in the genetic transmission of schizophrenia.

Chromosomes, Human, Pair 15↗
PubMed1998

Further investigation of a chromosome 15 locus in schizophrenia: analysis of affected sibpairs from the NIMH Genetics Initiative.

Linkage of a neurophysiological deficit associated with schizophrenia, i.e., the failure to inhibit the auditory P50 response, was previously reported at chromosome 15q14. The marker with the highest pairwise lod score, D15S1360, was isolated from a yeast artificial chromosome containing a candidate gene, the alpha7-nicotinic acetylcholine receptor gene. In the present study, this linkage was further investigated in a subset of the NIMH Genetics Initiative schizophrenia families. These families have not been studied neurophysiologically, as were the families in the original report. Therefore, the DSMIII-R diagnosis of schizophrenia was used as the affected phenotype. Twenty families fulfilled the criteria of at least one sibpair concordant for schizophrenia, along with their two parents or another affected relative outside the nuclear family, available for genotyping. Sibpair analysis showed a significant proportion of D15S1360 alleles shared identical-by-descent (0.58; P < 0.0024). The results further support the involvement of this chromosomal locus in the genetic transmission of schizophrenia.

Chromosomes, Human, Pair 15↗
PubMed1998

Genome-wide search for schizophrenia susceptibility loci: the NIMH Genetics Initiative and Millennium Consortium.

Schizophrenia has a complex pattern of inheritance, indicative of interactions among multiple genes and environmental factors. The detection and replication of specific susceptibility loci for such complex disorders are facilitated by the availability of large samples of affected sib pairs and their nuclear families, along with standardized assessment and systematic ascertainment procedures. The NIMH Genetics Initiative on Schizophrenia, a multisite collaborative study, was established as a national resource with a centralized clinical data base and cell repository. The Millennium Schizophrenia Consortium has completed a genome-wide scan to detect susceptibility loci for schizophrenia in 244 individuals from the nuclear families of 92 independent pairs of schizophrenic sibs ascertained by the NIMH Genetics Initiative. The 459 marker loci used in the scan were spaced at 10-cM intervals on average. Individuals of African descent were higher than those of European descent in their average heterozygosity (79% vs. 76%, P < .0001) and number of alleles per marker (9.2 vs. 8.4, P < .0001). Also, the allele frequencies of 73% of the marker loci differed significantly (P < .01) between individuals of European and African ancestry. However, regardless of ethnic background, this sample was largely comprised of schizophrenics with more than a decade of psychosis associated with pervasive social and occupational impairment.

Adolescent↗
PubMed1998

Measurement of temperament and character in mood disorders: a model of fundamental states as personality types.

BACKGROUND: Personality assessment may allow reliable measurement of risk of mood disorders. METHODS: A group of adults (804) representative of the general population were assessed by questionnaire. Personality types were measured by the Temperament and Character Inventory (TCI). RESULTS: Specific TCI configurations define personality types that can be described as hyperthymic, cyclothymic, irritable, and depressive. Each type had a unique profile of emotions, suicide attempts, and hospitalization. CONCLUSIONS: TCI traits are associated with mood disorders. LIMITATIONS: Different ways of measuring Kraepelinean subtypes may disagree. Whether differences in personality cause psychopathology, or vice versa, remains uncertain. CLINICAL RELEVANCE: Personality profiles help in assessing suicidality and planning treatment.

Adolescent↗
PubMed1997

Role of personality self-organization in development of mental order and disorder.

Normal and abnormal personality development can be quantified in terms of 15 specific steps in the self-organization of character as a complex adaptive system. Character is measured as three dimensions of Self-directedness, Cooperativeness, and Self-transcendence, each with five components corresponding to steps in personality development. Each of these steps is differentially influenced by heritable temperament dimensions, antecedent steps in character development, and life experiences. Predictions about the nonlinear dynamics of personality development, such as equifinality and multifinality, are confirmed in longitudinal data about individuals representative of the general population. The stepwise development of character determines large differences between individuals in their risk of psychopathology, as well as varying degrees of maturity and health.

Child↗
PubMed1997

Integrative psychobiological approach to psychiatric assessment and treatment.

A Developmental approach to integrative psychobiology provides a flexible framework for both clinical assessment and treatment planning. Assessment of seven dimensions of personality using the Temperament and Character Inventory (TCI) allows for comprehensive description of individual differences in feelings, thoughts, and actions. Four temperament factors that are stable throughout life can be decomposed in terms of their underlying genetic structure. Character factors that mature in response to social learning can be decomposed in terms of the components that unfold in a stepwise fashion from infancy through adulthood. Pharmacotherapy and psychotherapy can be systematically matched to the personality structure and stage of character development of each individual. This provides comprehensive paradigm that integrates psychodynamic, cognitive-behavioral, interpersonal, and neurobiological insights into case formulation. Use of the TCI in clinical assessment and treatment planning was illustrated by a case independently assessed by Mardi Horowitz using another approach.

Adult↗
PubMed1995

Personality antecedents of alcoholism in a national area probability sample.

Kraepelin viewed alcoholism as a symptom complex caused by heritable individual differences in emotional predisposition and volitional control. Recent clinical and genetic research has distinguished subtypes of alcoholics with different personality traits, symptoms, course, mode of inheritance, and response to treatment. The heritable personality traits that influence the initiation, continuation, and severity of alcoholism were examined by interview of a national area probability sample of 1019 non-institutionalized adults across the continental United States of America. We found that harm avoidance inhibits the initiation and frequency of drinking, but increases the risk of developing problems once frequent drinking has begun. Novelty seeking increases the initiation of drinking and the probabilities of frequent and problem drinking. This supports Kraepelin's description of the etiology and course of alcoholism as a symptom complex related to individual differences in emotional predisposition.

Adolescent↗
PubMed1993

A psychobiological model of temperament and character.

In this study, we describe a psychobiological model of the structure and development of personality that accounts for dimensions of both temperament and character. Previous research has confirmed four dimensions of temperament: novelty seeking, harm avoidance, reward dependence, and persistence, which are independently heritable, manifest early in life, and involve preconceptual biases in perceptual memory and habit formation. For the first time, we describe three dimensions of character that mature in adulthood and influence personal and social effectiveness by insight learning about self-concepts. Self-concepts vary according to the extent to which a person identifies the self as (1) an autonomous individual, (2) an integral part of humanity, and (3) an integral part of the universe as a whole. Each aspect of self-concept corresponds to one of three character dimensions called self-directedness, cooperativeness, and self-transcendence, respectively. We also describe the conceptual background and development of a self-report measure of these dimensions, the Temperament and Character Inventory. Data on 300 individuals from the general population support the reliability and structure of these seven personality dimensions. We discuss the implications for studies of information processing, inheritance, development, diagnosis, and treatment.

Character↗
PubMed1993

Differential diagnosis of personality disorders by the seven-factor model of temperament and character.

We used multiaxial structured interviews and questionnaires to evaluate the ability of self-reports on seven personality dimensions to predict independent interview diagnoses of DSM-III-R personality disorders. We studied 136 consecutive adult psychiatric inpatients, excluding those with psychosis, organic mental disorders, and severe agitation. Sixty-six patients had interview diagnoses of DSM-III-R personality disorders. Most also had mood disorders. We confirmed the hypotheses that self-reports of low self-directedness and cooperativeness strongly predicted the number of personality symptoms in all interview categories, whereas the other factors distinguished among subtypes as predicted. Self-directedness and cooperativeness also predicted the presence of any personality disorder by differentiating patients varying in risk from 11% to 94%. Patients in clusters A, B, and C were differentiated by low reward dependence, high novelty seeking, and high harm avoidance, respectively. We conclude that low self-directedness and cooperativeness are core features of all personality disorders and are validly measured by the seven-factor Temperament and Character Inventory, but not the five-factor Neuroticism-Extraversion-Openness inventory. Each DSM-III-R personality disorder category is associated with a unique profile of scores in the seven-factor model, providing an efficient guide to differential diagnosis and treatment.

Character↗
PubMed1992

The relationship of personality to mood and anxiety states: a dimensional approach.

This study evaluates the relationship of personality to mood and anxiety states in a sample of 50 psychiatric out patients. In order to overcome arbitrariness inherent in categorical diagnoses of affective, personality and anxiety disorders, we use a dimensional approach to personality, mood and anxiety. According to our results, mood and anxiety states affect personality domains differentially. Namely, relatively large portions of personality and behavior, such as higher-order traits of novelty seeking and reward dependence, seem independent from mood and anxiety states. In contrast, the higher-order dimension of harm avoidance and its corresponding lower-order traits reflect changes in mood and anxiety to a much greater extent. Both the likelihood that large portions of personality may be independent from current mood and the likelihood that some precisely delineated personality domains tend to change simultaneously with current mood may improve our understanding of the relationship of personality to emotionality and affective disorders.

Adult↗
PubMed1992

Mood states and personality traits.

In this article we analyze the relationship between personality traits assessed by the Tridimensional Personality Questionnaire, and six mood states assessed by the Profile of Mood States-bipolar form. Our data suggest that large portions of personality and/or behavior, e.g., higher order dimensions of Novelty Seeking and Reward Dependence, can be relatively independent from current mood. In contrast, the Harm Avoidance dimension covaries with mood and anxiety. Also, we analyze the psychometric properties of the Profile of Mood States-bipolar form, and discuss some practical aspects of our findings.

Adolescent↗
PubMed1991

Developmental, structural, and clinical approach to narcissistic and antisocial personalities.

The conception of personality disorders (PDs) as distinct units of mental disorders is neither precise nor useful. At least some PDs, classified as separate units, reflect different behavioral expression of the same personality deviation. In this article we describe structural, developmental, and clinical continuum between relatively distinct entities of antisocial PD and narcissistic PD. The two disorders represent different endpoints sharing a borderline level of personality organization and pathological narcissism. We propose a spectrum relation for antisocial and narcissistic PD because the disorders tend to co-occur in the same individual and to run in the same family more often than expected by chance.

Antisocial Personality Disorder↗
PubMed1991

Antisocial behavior and personality disorders.

Present classifications fall short of helping clinicians to systematically approach syndromes of antisocial (A-S) behavior. Various clinical forms of A-S behavior derive from different levels of personality organization (normal, neurotic, and borderline level) whereas certain personality disorders (PD) display specific antisocial "profiles" and form the horizontal continuum of antisocial behavior. The borderline level of personality and pathological narcissism stand behind A-S PD, Narcissistic PD, and Histrionic PD. The authors propose that the disorders should be regarded as spectrum disorders. Paranoid PD and "pure" Borderline PD complete the list of PDs manifesting A-S behaviors. Finally, diagnostic instruments for clinical approach to and research of A-S PD are presented.

Antisocial Personality Disorder↗
PubMed1991

The Tridimensional Personality Questionnaire: U.S. normative data.

The Tridimensional Personality Questionnaire is a self-report personality inventory measuring three major personality dimensions: Novelty Seeking, Harm Avoidance, and Reward Dependence. Normative data, based on a U.S. national probability sample of 1,019 adults, are presented and the psychometric properties of the questionnaire are discussed.

Adolescent↗
PubMedDate not supplied

Dimensional assessment of personality in an out-patient sample: relations of the systems of Millon and Cloninger.

The Cloninger Temperament and Character Inventory (TCI) and the Millon Clinical Multiaxial Inventory (MCMI-II) are both self-report inventories that can be used to assess personality reliably in clinical samples. Both instruments were administered to 103 consecutive psychiatric out-patients with or without personality disorders. The goals were to assess the convergent validity of the two instruments, to replicate the findings of Svrakic et al. (1993) Archives of General Psychiatry, 50, 991-999, about the differential diagnosis of Axis II disorders, and to analyse the relations of Millon's measures of Axis I disorders with Cloninger's measures. We observed a strong convergent validity between the instruments; the seven dimensions of the TCI accounted for most of the variance in MCMI-II measures of both Axis 1 and Axis 2 disorders. As reported by Svrakic et al. (1993) Archives of General Psychiatry, 50, 991-999, in in-patients, low self-directedness and low cooperativeness were confirmed to be the essential features of all personality disorders in out-patients. In addition, self-transcendence, the third of Cloninger's character dimensions, was observed to be a strong correlate of severe Axis-1 psychopathology, including manic and delusional disorders.

Adolescent↗