STUDY OBJECTIVES: To describe the clinical, neurophysiological, and polysomnographic characteristics of propriospinal @entity2045 (PSM) at the sleep-wake transition. DESIGN: @entity1 referred for @entity22 due to @entity3148 arising during relaxed wakefulness preceding sleep, or complaining of muscular jerks also during intrasleep wakefulness and upon awakening in the morning were considered. SETTING: All @entity1 underwent EEG-EMG recordings during wakefulness and night sleep. Back-averaging of the EEG activity preceding the jerks was performed. Somatosensory evoked potentials (SEPs), @entity9808 ( @entity9808 ) and spinal and cranial MRI were also done. @entity1 : Four @entity1 were studied all affected with @entity2045 arising when falling asleep, and one with jerks also during sleep and upon awakening in the morning. INTERVENTIONS: N/A. MEASUREMENTS AND RESULTS: Polysomnographic investigations revealed jerks arising during the sleep-wake transition period. Myoclonic activity was neurophysiologically documented to be of the propriospinal type. SEPs, @entity9808 and MRI were normal CONCLUSIONS: PSM may have a peculiar relationship with the state of vigilance and represent a @entity1021 . In this regard we consider PSM a new type of @entity4939 .

Propriospinal @entity2045 at the sleep-wake transition: a new type of XXXX .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'PARTICIPANTS'] @entity2045 :: ('MESH:D009207', 'Disease') :: ['involuntary jerks', 'myoclonus'] @entity9808 :: ('MESH:C536917', 'Disease') :: ['TMS', 'transcranial magnetic stimulation'] @entity1021 :: ('MESH:D020922', 'Disease') :: ['sleep-wake transition disorder'] @entity4939 :: ('MESH:D020447', 'Disease') :: ['parasomnia'] @entity3148 :: ('MESH:D004831', 'Disease') :: ['myoclonic activity'] @entity22 :: ('MESH:D007319', 'Disease') :: ['insomnia']
@entity4939 :: (MESH:D020447,Disease) :: ['parasomnia']
