Cerebral somatosensory responses evoked during sleep in man

摘要: Human somatic evoked responses (SERs) were recorded from the scalps of eleven subjects to percutaneous shock stimulation median nerve during waking, slow wave and REM sleep. Both short- long-latency SERs vary systematically with stage sleep: 1. 1. The cortical primary post-synaptic positivity is markedly reduced in sleep compared waking sleep; contrast, this response cat reported be largest REM. This possibly reflects a species difference between man responsiveness REM. 2. 2. Short-latency (15 msec) “myogenic” percutaneously trapezius muscle at neck show no change Thus they do not appear mediated same way as monosynaptic or polysynaptic spinal reflexes found by others suppressed REM. 3. 3. Long-latency seen are essentially absent drowsy subject As EEG synchronizes, late activity occurs consisting two negative-positive sequences which we label 6a 6b respectively. Component decreases amplitude increasing synchronization; it may correspond component 4 but latency increase very large. appears 2 much longer than any increases synchronization. We suggest that has counterpart represents release neural inhibited SER components also auditory stimulation. corresponds K complex.