Thread by @theneurolander

Rabbit syndrome!!!

“a peculiar extrapyramidal reaction”

Canadian psychiatrist André Villeneuve
1972, the first report

#MedTwitter #neurotwitter #EndNeurophobia #tweetorials

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Definition

“stereotyped vertical, rhythmic movements, similar to the chewing movements of a rabbit”

5 Hz
Lips produce a popping sound
Not tardive dyskinesia!
- persist stage I sleep

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Pathophysiology

- cholinergic system?

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Clinical tips
dyskinesia versus rabbit syndrome

i) tongue 10s extruded
- dyskinesia, tongue twist
- rabbit, no movement

ii) lips movement
- only vertical, rabbit syndrome
- all directions, dyskinesia

iii) movement pace
- fast & rhythmic, rabbit
- slower & irreg, dyskinesia

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Management

Long-term antipsychotic use, begins a few days after modification in psych treatment

Disappear after antipsychotic discontinuation

- anti-Parkinson's drugs, some

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Rabbit syndrome

💡after risperidone withdrawal

via: Medtext Publications

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Rabbit syndrome

💡amisulpride-induced

via: Srinivasa Teja

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Rabbit syndrome

💡paliperidone discontinuation

doi.org/10.1097/jcp.0b… via: J Clin Psychopharmacol

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Rabbit syndrome

💡functional

doi.org/10.5334%2Ftohm… via: Tremor Other Hyperkinet Mov (N Y)

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Differ

perioral & pharyngeal myorhythmia
- lower freq (1-4 Hz), when compared to rabbit syndrome

doi.org/10.1016/j.park… via: Parkinsonism Relat Disord

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Differ

tardive dyskinesia
- 🔄& irregular

via: Bác Sĩ Thần Kinh

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Differ

perioral myorhythmia
- lower freq (1-4 Hz), when compared to rabbit syndrome

💡 medullary compression by vertebral artery

doi.org/10.1007/s10072… via: Neurol Sci

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Differ

perioral myorhythmia
- lower freq (1-4 Hz), when compared to rabbit syndrome

💡EMG should be performed

doi.org/10.4103%2Faian… via: Ann Indian Acad Neurol

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NeuroTeach - Content

The blog contains all the threads and videos.

neuronland.blogspot.com/2022/11/neurot…

Have a great day!

Differ

hereditary chin trembling (geniospasm)

💡childhood
💡improve w/ aging
💡botox-sensitive

doi.org/10.1212/WNL.00… via: Neurology @sdo_henrique

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