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Günter Schwendemann

Publications and source records attributed to Günter Schwendemann.

2 recordsLinked to original sources

Group therapy for memory impaired patients: a partial remediation is possible.

BACKGROUND AND PURPOSE: To analyse the prospect of memory training for patients with organic brain damage. METHODS: Sixty-two patients with memory disorder were assigned to three different groups: a control group (n=16) with low dose memory training, a process oriented memory training group (POT) (n=24) and a group (ST) who was taught to compensate for memory problems with different strategies (n=22). Most of the patients had suffered a stroke. Inclusion criteria were medium to weak memory impairment defined by the patients' performance in the California Verbal Learning Test. Patients with complete amnesia were excluded. Specific care was taken that the groups did not differ in age, time since illness, duration of rehabilitation effort, verbal and performance IQ, memory and attention performance. The two treatment groups received 20 hours memory training, the low dose memory training control group 7 sessions. RESULTS: The treatment groups improved in verbal and prospective memory, but only the group with POT experienced a significant improvement compared with the control group. Training effects were specific, i. e. they affected verbal memory, but were not encapsulated, i. e. generalized to the recall of prose passages and of appointments. The POT group also showed a statistically weak outperformance compared with the ST group and some attentional improvement as well. CONCLUSION: Memory training is effective in patients with organic brain lesion, but only if applied frequently. Comparing the two training high intensity treatments, a POT focus seems to be superior to teaching a set of compensation strategies.

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Theta and alpha oscillations reflect differences in memory strategy and visual discrimination performance in patients with Parkinson's disease.

The aim of the present study was to investigate alterations in brain oscillatory activity during transient intentional encoding of abstract novel shapes in patients with Parkinson's disease (PD). Combined time-frequency analyses of alpha and theta power revealed a clear dissociation between PD patients (N=10) and age-matched healthy controls (N=10). PD patients used sub-optimal stimulus encoding strategies for subsequent maintenance and recall, whereas the controls mainly used categorization processes. In contrast to controls, PD patients showed significantly less theta increase and upper alpha suppression at frontal locations and significant laterality of early posterior theta and lower-2 alpha oscillations at right posterior locations. These findings suggest that the fronto-striatal circuits participate in visual categorization processes. Furthermore, theta and alpha oscillations appear to be involved in mediating the integration processes in mnemonic networks underlying visual categorization.

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