PubMed Health⌕ Search

Biomedical subjects

U Klages

Publications and source records attributed to U Klages.

At least 37 records · Page 2Linked to original sources
PubMed1991

Brain dysfunction in psychiatric patients during music perception measured by EEG mapping: relation to motor dysfunction and influence of neuroleptic drugs.

We report here our findings on music perception obtained as a companion study to the investigation with 16-channel EEG mapping in psychiatric patients during motor activation, published recently elsewhere. We decided to add on a study of this functional circuit, since there is evidence that it is disturbed in various psychiatric patient groups (another "functio laesa"). Involved in the study were 23 male and 25 female schizophrenics, 11 male and 18 female non-endogenously depressed patients (not presently under medication, i.e. drug-naive or wash-out period from 1 week to 17 years), 26 male and 37 female endogenously depressed patients (medicated with tri- or tetracyclic antidepressants and/or benzodiazepines; no lithium), and 22 male and 17 female control subjects (i.e. n = 179). We compared resting conditions after a special relaxation procedure with three music perception tasks: (1) a standardised rumba rhythm generated by a keyboard and delivered binaurally by earphones, (2) the same as an arpeggio in D major, and (3) the same as an arpeggio with a tonic-subdominant-dominant cadence. Major results were obtained in the delta and alpha frequency bands, yielding signs of "diffuse hyperactivation", most prominent in schizophrenic males, and not observed to a similar extent in any other patient group or in normal controls. Interestingly, there were major sex differences, yielding a more diffuse EEG activation pattern in normal females than in males and thus possibly obscuring signs of brain function diffusion in female patients. Viewing our broader evidence of similar brain dysfunction when examining motor functional circuits, especially in schizophrenics, these findings provide further evidence of a brain disorganization with lack of laterality/diffusion which may be found in subgroups of these patients and not in other psychiatric disorders. In schizophrenic patients, these EEG signs of "diffuse hyperactivation" on simple motor and/or music stimulation were reduced to nearly normal by neuroleptic medication. The latter finding may contribute to possible clinical applications of EEG mapping, considering the EEG's unique suitability for long-term brain function monitoring. Other neuroimaging methods like SPECT and PET should be used for additional "external validation".

Adolescent↗
PubMed1991

Life events and irrational attitudes in patients with rheumatoid arthritis: relations to pain, disability and general health condition.

Previous research on the effects of life events on maladaptation suggest they should be related to disease impacts in rheumatoid arthritis (RA). From the concept of Rational-Emotive-Therapy the hypothesis was derived that irrational attitudes-in a similar way-are associated with disease related impairment. Subjects were 128 patients with definite RA from a specialized treatment center. When disease activity was controlled, positive change was associated with less disability, negative change was related to general symptoms. Relations between life events and three pain measures could not be established. Irrational attitudes shared significant common variance with three pain-measures (attributes, recent intensity, avoidance), with physical abilities, and with general health condition. The results were discussed with respect to literature and to clinical practice.

Adaptation, Psychological↗
PubMed1989

[Development of a questionnaire of irrational attitudes: results of a representative survey].

A representative sample of 1210 persons was tested with the German version of an irrational attitudes inventory (Plutchik 1976). Factorial analyses resulted in four dimensions. Scales with sufficient reliability (Cronbach's Alpha) were constructed. Correlations with sex and age were only marginal - but with subjective distress in several life areas and with estimates of stress reactions the scales correlated considerably high. It was concluded that reliability and validity of the irrational attitudes inventory proposed its use in behavioural analysis and treatment planning with psychotherapy patients.

Adaptation, Psychological↗
PubMed1988

Correction of coarctation of the aorta in neonates and young infants. An individualized surgical approach.

Because of the controversy concerning the ideal surgical repair for symptomatic coarctation of the aorta presenting in neonates and infants, our entire series of 179 children under the age of 12 months undergoing repair between January 1, 1976 and December 31, 1984 was reviewed. Of this group, 109 were neonates, 43 infants aged 31-90 days and 27 infants aged 90 days-12 months. Twenty patients had a simple coarctation and 159 had complex coarctation with additional intracardiac anomalies such as ventricular septal defect (37 patients also had pulmonary artery banding). One hundred and twenty-four were repaired with a subclavian flap operation, 32 with resection and end-to-end anastomosis and 23 with complex repairs (e.g. patch and reversed flap). Type of repair was the surgeon's choice and was selected on the basis of the anatomy of the coarctation. Total perioperative mortality was 15% (N = 27) while late mortality was 12% (N = 21). Twenty-one risk factors for mortality were evaluated by logistic analysis and the method of Cox. There was no risk difference between end-to-end versus subclavian flap repairs and all but one death occurred in patients with complex coarctations. Risk for in hospital death was increased by only one variable: the need for repair in the neonatal period. Risk for death in the first year of life was increased by the presence of congestive heart failure at initial presentation while later death correlated with intracardiac surgery. Recoarctation occurred in 28 patients (18.4%), all but 4 of these occurred in patients undergoing neonatal repairs.(ABSTRACT TRUNCATED AT 250 WORDS)

Aortic Coarctation↗
PubMed1984

Incorporation of [18O]water into 4-hydroxybenzoic acid in the reaction of 4-chlorobenzoate dehalogenase from pseudomonas spec. CBS 3.

4-Chlorobenzoate is dehalogenated by 4-chlorobenzoate dehalogenase from Pseudomonas spec. CBS 3 to form 4-hydroxybenzoate. In 18O enriched water the hydroxygroup of 4-hydroxybenzoate is quantitatively labelled with 18O. This result clearly shows, that 4-chlorobenzoate dehalogenase catalyzes the hydrolytic cleavage of the halogen-carbon bond, without the involvement of molecular oxygen, a reaction not yet described.

Chromatography, Gas↗
PubMed1984

Oxidation and dehalogenation of 4-chlorophenylacetate by a two-component enzyme system from Pseudomonas sp. strain CBS3.

In cell-free extracts from Pseudomonas sp. strain CBS3 the conversion of 4-chlorophenylacetate to 3,4-dihydroxyphenylacetate was demonstrated. By Sephacryl S-200 chromatography two protein fractions, A and B, were obtained which both were essential for enzyme activity. Fe2+ and NADH were cofactors of the reaction. NADPH also activated the enzyme, but less effectively than NADH. FAD had no influence on enzyme activity. 4-Hydroxyphenylacetate, 4-chloro-3-hydroxyphenylacetate, and 3-chloro-4-hydroxyphenylacetate were poor substrates for the enzyme, suggesting that these substances are not intermediates of the reaction. We therefore suggest that the reaction proceeds via a dioxygenated intermediate.

Cations, Divalent↗
PubMed1984

[Cluster analysis of alcoholic patients based on personality variables, social insecurity and control orientation].

200 alcoholics from 6 clinics with different therapeutic orientations were tested with the Freiburg Personality Inventory (Fahrenberg et al. 1978), an assertiveness-inventory (Ullrich u. Ullrich 1977), and a translated version of the Levenson (1973)-Locus of Control. On the base of a hierarchical-agglomerative cluster analysis four types of patients were suggested: 1) An aggressive-depressive, 2) a depressive-social anxious external controlled, 3) an assertive, 4) and a high stable alcoholic with well-balanced mood and internal control. The highest changes of generalized variance in a stepwise discriminant analysis were found on depression, misfortune-anxiety, impulsivity and control by powerful others. The reclassification rate was 85.5%. Out of 24 biographical data no one differed between the groups. The hypotheses of a population variation over different clinics was not supported. Differential therapeutic indications for the groups were discussed.

Alcoholism↗
PubMed1983

2-Haloacid dehalogenase from a 4-chlorobenzoate-degrading Pseudomonas spec. CBS 3.

Pseudomonas spec. CBS 3 contains a 2-haloacid dehalogenase induced by chloroacetate. The enzyme was purified about 25-fold to electrophoretic homogeneity by ammonium sulfate fractionation, hydroxyapatite, DEAE-cellulose and gel filtration. The relative molecular masses, as determined by Sephadex G-75 gel filtration and dodecyl sulfate polyacrylamide gel electrophoresis, were 41 000 and 28 000, respectively. The enzyme dehalogenated all monohaloacetates except fluoroacetate. Low activities were found against dichloroacetate and 2,2-dichloropropionate. The enzyme was inactive against trichloroacetate and 3-chloropropionate, it catalysed the stereospecific dehalogenation of L-2-chloropropionate to D-lactate, the rate of dehalogenation being about 20% of the rate of chloroacetate dechlorination. The enzyme activity was not affected by chelating agents and thiol reagents.

Acetates↗
PubMed1982

[Microbial degradation and 4-chlorophenylacetic acid. Chemical synthesis of 3-chloro-4-hydroxy-, 4-chloro-3-hydroxy- and 4-chloro-2-hydroxyphenylacetic acid (author's transl)].

Pseudomonas spec. CBS 3 converts 4-chlorophenylacetic acid partly into 3-chloro-4-hydroxy-, 4-chloro-3-hydroxy-, and 4-chloro-2-hydroxyphenylacetic acid by the action of monooxygenases. However, these compounds are not intermediates in the degradation of 4-chlorophenylacetic acid. Pseudomonas spec. CBS 3 is not able to grow with 3-chloro-4-hydroxy- and 4-chloro-3-hydroxyphenylacetic acid as sole carbon source. 4-Chloro-2-hydroxyphenylacetic acid is slowly degraded forming 4-chloro-2,3-dihydroxyphenylacetic acid. The actual degradation of 4-chlorophenylacetic acid seems to be initiated by the attack of a dioxygenase. The syntheses of 4-chloro-3-hydroxyphenylacetic acid and of 4-chloro-2-hydroxyphenylacetic acid are described.

Indicators and Reagents↗
PubMed1981

Degradation of 4-chlorophenylacetic acid by a Pseudomonas species.

Pseudomonas sp. strain CBS3 was able to utilize 4-chlorophenylacetic acid as the sole source of carbon and energy. When this strain was grown with 4-chlorophenylacetic acid, homoprotocatechuic acid was found to be an intermediate which was further metabolized by the meta-cleavage pathway. Furthermore, three isomers of chlorohydroxyphenylacetic acid, two of them identified as 3-chloro-4-hydroxyphenylacetic acid and 4-chloro-3-hydroxyphenylacetic acid, were isolated from the culture medium. 4-Hydroxyphenylacetic acid was catabolized in a different manner by the glutathione-dependent homogentisate pathway. Degradation enzymes of both of these pathways were inducible.

3,4-Dihydroxyphenylacetic Acid↗
PubMed1976

[Degradation of 4-chlorobenzoic acid by an Arthrobacter species (author's transl)].

An Arthrobacter sp. growing on 4-Chlorobenzoic acid as its sole source of carbon excretes 4-hydroxygenzoic acid and protocatechuic acid into the culture medium. Protocatechuic acid is further attacked by "meta"-cleavage. During growth of the Arthrobacter sp. on benzoic acid cis-cis muconic acid can be isolated from the medium, suggesting the involvement of the "ortho"-cleavage pathway. The enzymes both for the "meta"- and the "ortho"-cleavage pathway are inducible.

Arthrobacter↗
PubMed1975

[Survival time, capacity of action and radiological diagnosis after gunshot wounds of the cranium (author's transl)].

Three cases of suicidal temporal gunshots. Different circumstances in the clinical course and in the ability of action.--In one case there was a bullet tract in the lower temporal region with considerable destruction of the base of the skull, followed by immediate inability of action and early death. Another case with a transtemporal gunshot without radiological signs of a laceration of the base of skull showed severe disturbance of cerebral functions for some days and remaining blindness. In the third case there was a pistol shot in the temporal region with retained missile, full ability of acting and undisturbed consciousness. Causative for the differences in the effect of the gunshots are differences of weapons and amunition and the anatomical position of the wound track in the temporal region. Discussion about the role of concussion of the brain by different rate of transgression of energy from the missile to the skull. Reference to the importance of X-ray analysis and to a radiographic documentation of the findings in such cases.

Adult↗