Sleep disturbance is common in Parkinson's disease (PD). In this study we investigated the effect of a novel therapeutic tool, repetitive transcranial magnetic stimulation (rTMS) on sleep quality in PD patients. The study group consisted of 11 PD patients who underwent ten daily rTMS sessions at 15 Hz. Their sleep patterns were monitored with polysomnography. After the stimulation, non-REM stage-1 sleep and the number of nocturnal arousals decreased, thus improving sleep quality. These changes were probably related to the improvement of motor symptoms observed in UPDRS and in the 9 Hole peg test.
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The aim of the study was to find out whether the level of arterial oxygen saturation (Sa02) during sleep in obstructive sleep apnea (OSA) patients can be predicted on the basis of the static or dynamic lung volumes measurements or respiratory resistance measurements performed during wakefulness in the sitting and supine positions. Nineteen OSA patients were divided into 2 groups depending on the high and low Sa02 during sleep apneas (85:3% vs 78:9%). In the patients with the high Sa02 there was a bigger vital capacity (both in the sitting and supine positions), a lower residual volume/ total lung capacity ratio in the supine position and a smaller decrease of the expiratory reserve volume on adopting the supine posture, a higher mid-expiratory-flow, both in the sitting and supine positions, and a higher peak-expiratory-flow in the supine position as compared with patients with the low Sa02 during sleep apneas. The respiratory resistance and forced-expiratory-volume 1sec/vital capacity ratio were similar in both groups. Conclusion: the measurements of the lung volumes and capacities in the both the sitting and supine position allow predicting the level of the arterial oxygen desaturation during the episodes of sleep apnea in the OSA patients. Small-airways disease (that can be detected in the sitting and especially, in the supine position) leads to a more severe arterial oxygen desaturation during sleep in the OSA patients. The respiratory resistance does not influence the arterial oxygen desaturation in the OSA patients.
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