A descriptive analysis of neck myoclonus during routine polysomnography.

摘要: DURING REM SLEEP, MOVEMENTS ARE RARE DUE TO PHYSIOLOGIC MUSCLE ATONIA. SLEEP ATONIA OR RATHER HYPOTONIA, AS FOUND BY A recent work analyzing muscle activity across sleep stages,1 is caused by an active glycinergic post-synaptic inhibition of the spinal alpha-motoneurons resulting in hyperpolarization,2 although this concept has been challenged recently.3 In addition, caudal ventral mesopontine junction demonstrated to inhibit phasic motor during sleep.4 Nevertheless, even physiological sleep, random myoclonic twitching, particularly distal muscles limbs, described.5 During past decades, different approaches have applied order study sleep. They ranged from static charge sensitive bed6 over electroencephalographic artifact method7 direct observation, as well photography and videotaping.8 Recently, time-synchronized video-polysomnography became widely available. The main advantage technology that movements whole night can be directly correlated polysomnographic signals.9,10 In clinical analysis recordings, neck myoclonus observed but so far not described systematically. It typically presents registration short “stripe-shaped” movement-induced visible vertically EEG leads. This was designed investigate detail occurrence, frequency, characteristics associations with correlates comedication, night-to-night variability. we assessed occurrence NREM