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Rhythmic movement disorder (RMD) is a neurological disorder characterized by repetitive movements of large muscle groups immediately before and during sleep often involving the head and neck. It was independently described first in 1905 by Zappert as jactatio capitis nocturna and by Cruchet as rhythmie du sommeil . [ 1 ]
The main job of the sternocleidomastoid muscle is to help move the head and neck by turning the head to one side and bending the neck forward. [25] The sternocleidomastoid muscle gets its blood from different arteries in the neck, which bring oxygen and nutrients to keep the muscle healthy.
Eagle syndrome (also termed stylohyoid syndrome, [1] styloid syndrome, [2] stylalgia, [3] styloid-stylohyoid syndrome, [2] or styloid–carotid artery syndrome) [4] is an uncommon condition commonly characterized but not limited to sudden, sharp nerve-like pain in the jaw bone and joint, back of the throat, and base of the tongue, triggered by swallowing, moving the jaw, or turning the neck. [1]
Retrocollis is the extension of the neck (head tilts back) and uses the following muscles for movement: bilateral splenius, bilateral upper trapezius, bilateral deep posterior paravertebrals. This is the "chin-in-the-air" version. A combination of these head positions is common; many patients experience turning and tilting actions of the head. [10]
But those first migraine warning signs can be subtle and unexpected, including symptoms like difficulty concentrating, sleep disturbances, food cravings, neck pain and yawning.
Delayed onset Lhermitte's sign has been reported following head and/or neck trauma. [ 9 ] [ 10 ] This occurs ~2 1/2 months following injury, without associated neurological symptoms or pain, and typically resolves within 1 year.