A Descriptive Analysis of Neck Myoclonus During Routine Polysomnography

Frauscher, Birgit; Brandauer, Elisabeth; Gschliesser, Viola; Falkenstetter, Tina; Furtner, Martin; Ulmer, Hanno; Poewe, Werner; Högl, Birgit

doi:10.1093/sleep/33.8.1091

Cited by 32 publications

(44 citation statements)

References 16 publications

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“…We found that SRHJs are less frequently associated with REMs (14.8%) then in the report of Frauscher et al. (65.7%) (Frauscher et al., ). This suggests that the network implicated in generating SRHJ probably is not the same that regulates the oculocephalic synergy during wakefulness.…”

Section: Discussioncontrasting

confidence: 44%

“…Moreover, Frauscher et al. () found that only 20% of the events were accompanied by an arousal, while we found that about 60% of them were associated to an arousal or even to an awakening in 20% of the cases (Frauscher et al., ). These discrepancies could be explained by (a) the difference in the time window used to assess the associations which has not be specified in previous reports, (b) by the fact that Frauscher et al.…”

Section: Discussionmentioning

confidence: 39%

“…More than 50% of SRHJs were accompanied by non‐periodic leg movements, as compared to only 10% in the study of Frauscher et al. (). Moreover, Frauscher et al.…”

Section: Discussionmentioning

confidence: 63%

“…Recently, a new sleep related motor phenomenon named "neck myoclonus" (NM) was recognized as a common "short stripe-shaped movement-induced artifact" visible vertically over the polysomnographic (PSG) traces (Frauscher et al, 2010(Frauscher et al, , 2014. NM appeared as a head jerk and based on its high frequency in routine PSGs and apparently minor impact on sleep, it was considered as a physiological phenomenon (Frauscher et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…

| INTRODUC TI ONDespite sleep is a period of quiescence, motor activity occurs across all sleep stages. Changes in body position, blinking, swallowing and masticatory movements are commonly observed during sleep.Periodic limb movements (PLM), hypnic jerks and rapid eye movements (REM) sleep related twitches can be observed as well and are considered to be physiological till their frequency and severity exceed and affect sleep continuity (Frauscher et al, 2014;Montagna, 2003).Recently, a new sleep related motor phenomenon named "neck myoclonus" (NM) was recognized as a common "short stripe-shaped movement-induced artifact" visible vertically over the polysomnographic (PSG) traces (Frauscher et al, 2010(Frauscher et al, , 2014. NM appeared as a head jerk and based on its high frequency in routine PSGs and apparently minor impact on sleep, it was considered as a physiological phenomenon (Frauscher et al, 2010).Because of its segregation within REM sleep when REMs (ocular movements) occur, and since during wakefulness eye movements and head rotation are associated, one could hypothesize that NM is related to REMs and -similar to muscular twitches-escapes the physiological motor inhibition of REM sleep.

| ME THODS

| PatientsConsecutive video-PSGs (V-PSG) performed over 3 months at the Sleep Center were screened for NM.

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confidence: 99%

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From physiological neck myoclonus to sleep related head jerk

Wolfensberger

Ferri

Bianco³

et al. 2019

Journal of Sleep Research

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Neck myoclonus (NM) is a frequent recently described sleep‐related motor phenomenon occurring mainly during REM sleep with uncertain effect on sleep continuity. To better describe this phenomenon we studied 11 consecutive drug‐free patients undergoing a video‐polysomnographic (V‐PSG) study who present at least 5 NM events in one single night of recording. All events were measured and checked for their association with rapid eye and leg movements, EEG arousals, awakenings and Bereitschaftspotential. One hundred and eighty‐two motor events from 11 subjects were analyzed. Motor events were approximately 0.5 s in duration and occurred during REM sleep in 79.7% of the cases. Only 14.8% of the events were associated with rapid eye movements, 52.2% with leg movements, while approximately 80% of them were accompanied by an arousal or awakening. No EEG abnormalities and Bereitschaftspotential were observed. For its duration and its segregation in sleep, NM could be more appropriately named “sleep‐related head jerks” (SRHJ). SRHJ should be recognized and its effect on sleep stability should be re‐considered.

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Section: Discussioncontrasting

confidence: 44%

Section: Discussionmentioning

confidence: 39%

“…More than 50% of SRHJs were accompanied by non‐periodic leg movements, as compared to only 10% in the study of Frauscher et al. (). Moreover, Frauscher et al.…”

Section: Discussionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

“…

| ME THODS

| PatientsConsecutive video-PSGs (V-PSG) performed over 3 months at the Sleep Center were screened for NM.

…”

mentioning

confidence: 99%

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From physiological neck myoclonus to sleep related head jerk

Wolfensberger

Ferri

Bianco³

et al. 2019

Journal of Sleep Research

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Restless legs syndrome and periodic leg movements in patients with movement disorders: Specific considerations

Högl

Stefani

2017

Movement Disorders

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Restless legs syndrome is a frequent neurological disorder with potentially serious and highly distressing treatment complications. The role and potential implications of periodic leg movements during sleep range from being a genetic risk marker for restless legs syndrome to being a cardiovascular risk factor. The diagnosis of restless legs syndrome in patients with daytime movement disorders is challenging and restless legs syndrome needs to be differentiated from other sleep-related movement disorders. This article provides an update on the diagnosis of restless legs syndrome as an independent disorder and the role of periodic leg movements and reviews the association of restless legs syndrome with Parkinson's disease and other movement disorders. © 2017 International Parkinson and Movement Disorder Society.

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Sleep‐related motor and behavioral disorders: Recent advances and new entities

et al. 2018

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Patients with sleep-related motor and behavioral disorders present to a variety of subspecialty clinics (neurology, sleep medicine, respiratory medicine, psychiatry). Diagnosing these disorders can be difficult, and sometimes they have a significant impact on quality of life. Alongside a number of common and well-recognized conditions, several new disease entities have been described in recent years that present with abnormal nocturnal motor phenomena (such as ADCY5-associated disease and anti-IgLON5 disease). Our understanding of the neural basis and prognostic significance of other sleep-related disorders has also grown, particularly rapid eye movement sleep behavior disorder. This review (along with a collection of previously unpublished videos) is intended to aid in the recognition and treatment of these patients. The recent change in terminology from nocturnal frontal lobe epilepsy to sleep-related hypermotor epilepsy is also discussed. © 2018 International Parkinson and Movement Disorder Society.

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A Descriptive Analysis of Neck Myoclonus During Routine Polysomnography

Abstract: Neck myoclonus is common during REM sleep and more frequent in younger individuals. This could indicate that neck myoclonus during REM sleep is a physiological phenomenon. If there is a cut-off distinguishing normal from excessive has to be investigated in further studies.

Cited by 32 publications

References 16 publications

From physiological neck myoclonus to sleep related head jerk

From physiological neck myoclonus to sleep related head jerk

Restless legs syndrome and periodic leg movements in patients with movement disorders: Specific considerations

Sleep‐related motor and behavioral disorders: Recent advances and new entities

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