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Propriospinal myoclonus: a motor phenomenon found in restless legs syndrome different from periodic limb movements during sleep.
Mov Disord. 2005 Oct; 20(10):1323-9.MD

Abstract

Three patients presented with a 25-, 15-, and 5-year history of restless legs syndrome (RLS) and periodic limb movements during sleep (PLMS). For 1, 4, and 5 years, they reported additional involuntary trunk and limbs jerks preceding falling asleep and occasionally during intrasleep wakefulness. Videopolysomnography revealed jerks during relaxed wakefulness arising in axial muscles with a caudal and rostral propagation at a slow conduction velocity, characteristic of propriospinal myoclonus (PSM). Jerk-related EEG-EMG back-averaging did not disclose any preceding cortical potential. During relaxed wakefulness preceding falling asleep and during intrasleep wakefulness, PSM coexisted with motor restlessness and sensory discomfort in the limbs. PSM disappeared when spindles and K-complexes appeared on the EEG. At this time, typical PLMS appeared every 20 to 40 seconds, especially during light sleep stages. PLMS EMG activity was limited to leg, especially tibialis anterior muscles, and did not show propriospinal propagation. In one patient, alternating leg muscle activation was also present. Jerks with a PSM pattern represent another motor phenomenon associated with RLS and different from the more usual PLMS.

Authors+Show Affiliations

Department of Neurological Sciences, University of Bologna, Bologna, Italy. vetrugno@neuro.unibo.itNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Case Reports
Journal Article

Language

eng

PubMed ID

16007657

Citation

Vetrugno, Roberto, et al. "Propriospinal Myoclonus: a Motor Phenomenon Found in Restless Legs Syndrome Different From Periodic Limb Movements During Sleep." Movement Disorders : Official Journal of the Movement Disorder Society, vol. 20, no. 10, 2005, pp. 1323-9.
Vetrugno R, Provini F, Plazzi G, et al. Propriospinal myoclonus: a motor phenomenon found in restless legs syndrome different from periodic limb movements during sleep. Mov Disord. 2005;20(10):1323-9.
Vetrugno, R., Provini, F., Plazzi, G., Cortelli, P., & Montagna, P. (2005). Propriospinal myoclonus: a motor phenomenon found in restless legs syndrome different from periodic limb movements during sleep. Movement Disorders : Official Journal of the Movement Disorder Society, 20(10), 1323-9.
Vetrugno R, et al. Propriospinal Myoclonus: a Motor Phenomenon Found in Restless Legs Syndrome Different From Periodic Limb Movements During Sleep. Mov Disord. 2005;20(10):1323-9. PubMed PMID: 16007657.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Propriospinal myoclonus: a motor phenomenon found in restless legs syndrome different from periodic limb movements during sleep. AU - Vetrugno,Roberto, AU - Provini,Federica, AU - Plazzi,Giuseppe, AU - Cortelli,Pietro, AU - Montagna,Pasquale, PY - 2005/7/12/pubmed PY - 2006/2/17/medline PY - 2005/7/12/entrez SP - 1323 EP - 9 JF - Movement disorders : official journal of the Movement Disorder Society JO - Mov Disord VL - 20 IS - 10 N2 - Three patients presented with a 25-, 15-, and 5-year history of restless legs syndrome (RLS) and periodic limb movements during sleep (PLMS). For 1, 4, and 5 years, they reported additional involuntary trunk and limbs jerks preceding falling asleep and occasionally during intrasleep wakefulness. Videopolysomnography revealed jerks during relaxed wakefulness arising in axial muscles with a caudal and rostral propagation at a slow conduction velocity, characteristic of propriospinal myoclonus (PSM). Jerk-related EEG-EMG back-averaging did not disclose any preceding cortical potential. During relaxed wakefulness preceding falling asleep and during intrasleep wakefulness, PSM coexisted with motor restlessness and sensory discomfort in the limbs. PSM disappeared when spindles and K-complexes appeared on the EEG. At this time, typical PLMS appeared every 20 to 40 seconds, especially during light sleep stages. PLMS EMG activity was limited to leg, especially tibialis anterior muscles, and did not show propriospinal propagation. In one patient, alternating leg muscle activation was also present. Jerks with a PSM pattern represent another motor phenomenon associated with RLS and different from the more usual PLMS. SN - 0885-3185 UR - https://www.unboundmedicine.com/medline/citation/16007657/Propriospinal_myoclonus:_a_motor_phenomenon_found_in_restless_legs_syndrome_different_from_periodic_limb_movements_during_sleep_ L2 - https://doi.org/10.1002/mds.20599 DB - PRIME DP - Unbound Medicine ER -