PubMed Health⌕ Search

Biomedical subjects

Ruud B Minderaa

Publications and source records attributed to Ruud B Minderaa.

25 records · Page 2Linked to original sources
PubMed2004

Autonomic response patterns observed during the performance of an attention-demanding task in two groups of children with autistic-type difficulties in social adjustment.

Two groups of children with autistic-type behavior problems were compared to a group of normal children with respect to their autonomic response patterns observed during the performance of an attention-demanding task. Heart rate, blood pressure, and respiratory activity were measured during periods of rest and of task performance. Applying a quantitative model of the baroreflex, we were able to demonstrate qualitative differences among the groups with respect to their vagally controlled response patterns, whereas sympathetic responsiveness did not differ. In terms of our model, the groups with autistic-type behavior showed a decrease in central vagal tone during task performance, while vagal gain appeared to be unaffected or even increased. In contrast, the children in the control group showed the expected pattern of a decrease in vagal gain while vagal tone appeared to be increased. Implications of our findings are discussed in the light of Damasio's somatic marking hypothesis.

Attention↗
PubMed2004

Association of small life events with self reports of tic severity in pediatric and adult tic disorder patients: a prospective longitudinal study.

BACKGROUND: Clinical experience suggests an association between stressful life events and fluctuations in symptom severity of tic disorder patients. The aim of the present study was to examine this possible relationship in a prospective longitudinal design. METHOD: Two groups of patients with tic disorder according to the research criteria of the Tourette Syndrome Classification Study Group were included in this study (Sept. 2001 through March 2002): a pediatric group aged from 7 through 16 years (N = 25) and an adult group aged 18 years and older (N = 32). During a 12-week period, participants were asked weekly to fill out questionnaires regarding the occurrence of small life events and self ratings of tic severity. RESULTS: Twenty-four of 25 patients in the pediatric group completed the study, and 28 of 32 patients in the adult group completed the study and reported at least 1 life event. In the adult group as a whole, we found a weak but statistically significant correlation between negative small life events and tic severity during the same week (r = 0.268, p <.001). However, only a minority of individual pediatric (21%) and adult (18%) patients demonstrated significant relationships between the frequency of small life events and tic severity in the same week or 1 week later (p </=.05), with undesirable small life events positively associated with tic severity in some patients and negatively associated with tic severity in other patients. CONCLUSION: Contrary to traditional views, in general, life events do not account for changes in tic severity. Only in a minority of tic disorder patients do fluctuations in symptom severity appear to be associated with possibly stressful small life events.

Adolescent↗
PubMed2004

Lack of effect of intravenous immunoglobulins on tics: a double-blind placebo-controlled study.

BACKGROUND: Case studies and a placebo-controlled study previously suggested the effectiveness of immunomodulatory therapy in patients with tic or related disorders whose symptoms show a relationship with streptococcal infections. No data are available on the effectiveness of intravenous immunoglobulins (IVIG) on tic severity in unselected tic disorder patients. METHOD: Thirty patients with a DSM-IV tic disorder were randomly assigned to IVIG (1 g/kg on 2 consecutive days; mean age = 28.71 years; range, 14-53 years) or placebo (mean age = 30.73 years; range, 14-63 years). Symptoms were rated with the Yale Global Tic Severity Scale, the Yale-Brown Obsessive Compulsive Scale, and the Clinical Global Impressions scale of symptom change with regard to tic severity. These were used at baseline and on weeks 2, 4, 6, 10, and 14 posttreatment, after which blinding was broken. The study was conducted from March through August 2002. RESULTS: We observed no significant differences between both treatment groups regarding posttreatment changes in tic severity. Severity of obsessions and compulsions, which was in the subclinical range, decreased significantly in the IVIG group compared with the placebo group at week 6 (p =.02). Then, there was a 32.3% improvement in the IVIG group compared with baseline. Though this improvement was maintained over the following 8 weeks, no statistically significant differences between the IVIG and the placebo group with regard to improvements in obsessions and compulsions were detected at subsequent assessments. IVIG treatment was associated with significantly more side effects than placebo, most notably headache. CONCLUSION: Based on the present results, IVIG cannot be recommended in tic disorders.

Adjuvants, Immunologic↗
PubMed2003

Increased seroreactivity in tic disorder patients to a 60 kDa protein band from a neuronal cell line.

In tic disorders, increased seroreactivity against neuronal antigens has been demonstrated, without performing molecular characterization of antigens. Here, unselected patients with a tic disorder were compared with healthy controls, autistic disorder (AD), and obsessive-compulsive disorder (OCD) patients. Seroreactivity against neuroblastoma cells was analyzed by Western blot. Anti-60 kDa binding occurred significantly more frequently in tic disorder patients (67.1%) than in AD (40.0%), OCD (40.0%) and healthy controls (41.9%). Sequence analysis of the 60 kDa protein band identified this as a ubiquitous heat shock protein. However, the involvement of other autoantigens with a molecular weight of 60 kDa cannot be excluded.

Adult↗
PubMed2003

Cognitive-behavioral therapy for children with anxiety disorders in a clinical setting: no additional effect of a cognitive parent training.

OBJECTIVE: To evaluate a 12-week cognitive-behavioral treatment program for children with anxiety disorders and the additional value of a seven-session cognitive parent training program. METHOD: Seventy-nine children with an anxiety disorder (aged 7-18 years) were randomly assigned to a cognitive behavioral treatment condition or a wait-list control condition. Families in the active treatment condition were randomly assigned to an additional seven-session cognitive parent training program. Semistructured diagnostic interviews were conducted with parents and children separately, before and after treatment and at 3 months follow-up. Questionnaires included child self-reports on anxiety and depression and parent reports on child's anxiety and behavioral problems. RESULTS: Children with anxiety disorders showed more treatment gains from cognitive-behavioral therapy than from a wait-list control condition. These results were substantial and significant in parent measures and with regard to diagnostic status, but not in child self-reports. In the active treatment condition, children improved on self-reported anxiety and depression, as well as on parent reports on their child's anxiety problems. These results were equal for clinically referred and recruited children. Child self-reports decreased to the normal mean, whereas parents reported scores that were lower than before treatment but were still elevated from the normal means. No significant outcome differences were found between families with or without additional parent training. CONCLUSIONS: Children with anxiety disorders profited from cognitive-behavioral therapy. Children improved equally whether or not additional parent training was offered.

Adolescent↗