Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Peter Parzer is active.

Publication


Featured researches published by Peter Parzer.


NeuroImage | 2010

Reduced prefrontal and orbitofrontal gray matter in female adolescents with borderline personality disorder: Is it disorder specific?

Romuald Brunner; Romy Henze; Peter Parzer; Jasmin Kramer; Nina Feigl; Kira Lutz; Marco Essig; Franz Resch; Bram Stieltjes

There is evidence that adults with borderline personality disorder (BPD) are characterized by abnormalities in frontolimbic brain areas. In this study we aimed to determine whether brain volume alterations already exist in adolescents with BPD. Sixty female right-handed individuals (age range, 14-18 years), 20 with a DSM-IV diagnosis of borderline personality disorder, 20 patients with a DSM-IV defined current psychiatric disorder and 20 healthy control subjects were included. Groups were matched for age and IQ. Using a 3 T MRI scanner, we collected 1 mm axial sections using a three-dimensional sagittal isotropic Magnetization Prepared Rapid Acquisition Gradient Echo (MPRAGE) sequence. Images were analyzed using voxel-based morphometry (VBM). Voxel-based analysis revealed that adolescents with BPD showed reduced gray matter in the dorsolateral cortex (DLPFC) bilaterally and in the left orbitofrontal cortex (OFC) relative to healthy control subjects. Adolescent clinical control subjects displayed significantly decreased gray matter volume in the right DLPFC in comparison with healthy control subjects. No significant gray matter differences were detected between the BPD group and the clinical control group. No group differences were found in the limbic system or in any white matter structures. The present study indicates that the early morphological changes in BPD are located in the PFC. However, these changes may not be BPD specific since similar changes were found in the clinical control group. Changes in limbic brain volumes and white matter structures might occur over the course of the illness.


Psychiatry Research-neuroimaging | 2013

Adverse childhood experiences and their impact on frequency, severity, and the individual function of nonsuicidal self-injury in youth

Michael Kaess; Peter Parzer; Margarete Mattern; Paul L. Plener; Antonia Bifulco; Franz Resch; Romuald Brunner

This study aimed to investigate a specific relationship between nonsuicidal self-injury (NSSI) and a variety of adverse childhood experiences (ACEs) over and above childhood abuse and their impact on frequency, severity, and functions of NSSI. A sample of 125 inpatients (aged 13 to 26) was consecutively recruited within a psychiatric university hospital. Frequency, methods and functions of NSSI were assessed by the Functional Assessment of Self-Mutilation (FASM), ACEs were assessed by the Childhood Experiences of Care and Abuse Questionnaire (CECA.Q). The 12 month prevalence of NSSI in this representative, clinical sample was 60.0%. Engagement in NSSI was significantly related to ACEs with highest associations for maternal antipathy and neglect. Whilst ACEs were not associated with frequency or severity of NSSI, some ACEs were significantly related to the automatic functions of NSSI (e.g., affect regulation, anti-dissociative function or self-punishment) as well as to a peer identification function. NSSI represents a frequent phenomenon among young clinical populations and seems to be specifically related to ACEs with maternal antipathy or neglect commonly featured over and above experiences of abuse. Since ACEs also influence the functions of NSSI such factors need to be examined as part of clinical care planning.


Psychological Medicine | 2007

Estrogen, menstrual cycle phases, and psychopathology in women suffering from schizophrenia

Niels Bergemann; Peter Parzer; B. Runnebaum; Franz Resch; Christoph Mundt

BACKGROUND Estrogen has been hypothesized to have a protective and antipsychotic-like effect in women at risk for schizophrenia. The aim of the present study was to evaluate the association between menstrual cycle and/or estrogen levels and psychotic symptoms in a sample of women with schizophrenia. METHOD One hundred and twenty-five premenopausal women with schizophrenia and regular menses were examined. The levels of 17beta-estradiol and other hormones of the gonadal axis were assessed in the follicular, peri-ovulatory, and luteal phases of the menstrual cycle. The effects of the menstrual cycle phase and/or the estradiol level on the Positive and Negative Syndrome Scale (PANSS) and the Brief Psychiatric Rating Scale (BPRS) scores were calculated by means of regression analyses. RESULTS Significant improvement in psychotic, but not depressive, symptoms was observed during the luteal phase, compared with other days of the menstrual cycle. CONCLUSIONS The present findings indicate that estradiol may have specific antipsychotic-like effects on the symptoms of schizophrenia. Thus further investigation into the therapeutic effect of estrogen may be worthwhile.


Journal of Nervous and Mental Disease | 2000

Dissociative symptomatology and traumatogenic factors in adolescent psychiatric patients

Romuald Brunner; Peter Parzer; Volker Schuld; Franz Resch

This study describes the relation of different types of childhood trauma to the degree of dissociative experiences. Subjects were 198 consecutively admitted adolescent psychiatric patients, 11 to 19 years old (89 inpatients and 109 outpatients). All patients completed the Adolescent Dissociative Experiences Scale. A Checklist of Traumatic Childhood Events was filled out by clinicians. The results showed an increase in the degree of dissociative experiences in patients with a history of sexual abuse, physical abuse, neglect, and stressful life events. With the exception of life events, a moderate form of traumatic experience had the same effect on dissociative experiences as severe forms. The strongest effect was found for emotional neglect, which seems to be an important pathogenic risk factor. The results suggest that therapists and researchers should be aware that even less severe forms of abuse and neglect may have a significant impact on the development of dissociative psychopathology in adolescents.


Cephalalgia | 2003

Emotional and Behavioural Problems in Children and Adolescents with Primary Headache

U Just; R Oelkers; Stephan Bender; Peter Parzer; F Ebinger; Matthias Weisbrod; Franz Resch

Psychiatric co-morbidity is an important risk factor for chronification of primary headache into adulthood. The aim of this study was to investigate the extent and clinical relevance of emotional and behavioural problems in children and adolescents with primary headache. Children and adolescents (n = 128) with primary headache (International Headache Society, codes 1.1, 1.2, 2.1) and 83 matched controls aged 6-18 years were examined by standardized dimensional psychomet-rical tests (Child Behaviour Checklist, Depression Inventory for Children and Adolescents, Anxiety Questionnaire for Pupils). Children and adolescents with primary headache suffer more often from internalizing problems (depression, anxiety, somatization) than healthy controls. The detected emotional and behavioural problems are clinically relevant and require particular therapy in every third child suffering from headache. Two out of three children and adolescents with primary headache do not show clinically relevant psychopathology and may benefit from minimal therapeutic intervention. One of three examined headache patients needs additional psychiatric therapy.


Neurology | 2005

Effect of corticosteroids on short-term and long-term memory

Romuald Brunner; D. Schaefer; Klaus Hess; Peter Parzer; Franz Resch; Stefan Schwab

The effect of acute high-dose glucocorticoid therapy on memory function in patients with acute optic neuritis (n = 9) and multiple sclerosis (n = 21) was studied. All patients had reversible impairment of long-term memory functions, whereas measures of short-term memory, attentional functions, and alertness remained unaffected.


NeuroImage | 2006

Diffusion tensor imaging in primary brain tumors: reproducible quantitative analysis of corpus callosum infiltration and contralateral involvement using a probabilistic mixture model.

Bram Stieltjes; Mathias Schlüter; Bernd Didinger; Marc-André Weber; Horst K. Hahn; Peter Parzer; Jan Rexilius; Olaf Konrad-Verse; Heinz-Otto Peitgen; Marco Essig

Diffusion tensor imaging (DTI) has been advocated as a promising tool for delineation of the extent of tumor infiltration by primary brain tumors. First reports show conflicting results mainly due to difficulties in reproducible determination of DTI-derived parameters. A novel method based on probabilistic voxel classification for a user-independent analysis of DTI-derived parameters is presented and tested in healthy controls and patients with primary brain tumors. The proposed quantification method proved to be highly reproducible both in healthy controls and patients. Fiber integrity in the corpus callosum (CC) was measured using this quantification method, and the profiles of fractional anisotropy (FA) provided additional information of the possible extent of infiltration of primary brain tumors when compared to conventional imaging. This yielded additional information on the nature of ambiguous contralateral lesions in patients with primary brain tumors. The results show that DTI-derived parameters can be determined reproducibly and may have a strong impact on evaluation of contralateral extent of primary brain tumors.


Psychoneuroendocrinology | 2012

Alterations in the neuroendocrinological stress response to acute psychosocial stress in adolescents engaging in nonsuicidal self-injury.

Michael Kaess; Markus Hille; Peter Parzer; Christiane Maser-Gluth; Franz Resch; Romuald Brunner

OBJECTIVE To investigate the neuroendocrinological stress response to acute psychosocial stress in a clinical sample of female adolescents engaging in nonsuicidal self-injury (NSSI). METHODS The Trier Social Stress Test (TSST), a standardized psychosocial stress protocol, was performed in 14 female patients who engaged in NSSI and 14 healthy control subjects. NSSI was assessed by the Functional Assessment of Self-Mutilation (FASM). Salivary cortisol, heart rate, and affective states, assessed by the Positive and Negative Affect Schedule (PANAS), were measured during the TSST. RESULTS We found an attenuated cortisol response to acute psychosocial stress in female adolescents with NSSI, whereas no group differences were observed in heart rate and emotional response to the TSST. CONCLUSIONS These findings indicate that the HPA axis is hyporesponsive in adolescents with NSSI. Therefore, reduced secretion of cortisol could play a role in promoting vulnerability of these individuals to acute stress and maladaptive stress responses.


Australian and New Zealand Journal of Psychiatry | 2005

Psychosocial support for war-traumatized child and adolescent refugees: evaluation of a short-term treatment program

Heike Möhlen; Peter Parzer; Franz Resch; Romuald Brunner

OBJECTIVE The purpose of this study was to evaluate a newly designed psychosocial treatment program for war traumatized child and adolescent refugees. The program was designed to reduce emotional distress and improve psychosocial functioning. METHOD Ten young Kosovan refugees (mean age 13.3 years) residing in Germany participated in the manual based intervention program. This multimodal program consists of individual, family and group sessions using a psychoeducational approach beside trauma and grief focusing activities, creative techniques and relaxation. Kind and severity of traumatic experiences were gathered by interviewing the child and their caretakers using the Harvard Trauma Questionnaire (HTQ). Psychiatric diagnoses (Schedule for Affective Disorders and Schizophrenia for School-Age Children, K-SADS) were assessed prior to the intervention. Post-traumatic symptomatology (HTQ), emotional problems (Diagnostic System for Psychological Disorders, DYSIPS) and the overall psychosocial functioning (Child Global Assessment Scale, CGAS) were assessed before and after the 12-week intervention. RESULTS Following the intervention the degree of overall psychosocial functioning increased substantially in 9 of 10 participants. Furthermore, post-traumatic, anxiety and depressive symptoms were reduced significantly. The rate of post-traumatic stress disorder (PTSD) diagnoses fell from 60% to 30%. The number of patients with PTSD and a high rate of comorbid symptoms (depression and anxiety) as well as a history of severe traumatization remained at 30%. CONCLUSIONS This study suggests that the psychosocial treatment program specified for war traumatized adolescents may be useful for the relief of psychiatric sequelae and for an improvement in overall psychosocial functions, but not for the subgroup of severely traumatized patients with complex psychiatric disturbances.


European Journal of Pain | 2008

Butterbur root extract and music therapy in the prevention of childhood migraine: an explorative study.

Rieke Oelkers-Ax; Anne Leins; Peter Parzer; Thomas K. Hillecke; Hans Volker Bolay; Jochen Fischer; Stephan Bender; Uta Hermanns; Franz Resch

Background: Migraine is very common in school‐aged children, but despite a number of pharmacological and non‐pharmacological options for prophylaxis, randomized controlled evidence in children is small. Evidence‐based prophylactic drugs may have considerable side effects.

Collaboration


Dive into the Peter Parzer's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Bram Stieltjes

German Cancer Research Center

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Romy Henze

German Cancer Research Center

View shared research outputs
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge