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Bobble-head doll syndrome is a rare neurological movement disorder in which patients, usually children around age 3, begin to bob their head and shoulders forward and back, or sometimes side-to-side, involuntarily, in a manner reminiscent of a bobblehead doll. The syndrome is related to cystic lesions and swelling of the third ventricle in the ...
Rhythmic movement disorder. 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]
Nodding disease, also known as nodding syndrome, is a mentally and physically disabling disease that affects children aged 3 and above, continuing into adulthood. [2] It was first described in 1962 in secluded mountainous regions of Tanzania, with sporadic outbreaks in the decades since in South Sudan, Uganda, and again in Sudan with its largest outbreak from 2016 to present.
De Musset's sign is a type of head tremor. [1][2] This symptom consists in rhythmic nodding or bobbing of the head in synchrony with the beating of the heart, in general as a result of aortic regurgitation whereby blood from the aorta regurgitates into the left ventricle due to a defect in the aortic valve. [3][4] The nodding is an indication ...
Nod (gesture) A depiction of a person nodding. A nod of the head is a gesture in which the head is tilted in alternating up and down arcs along the sagittal plane. In many cultures, it is most commonly, but not universally, used to indicate agreement, acceptance, or acknowledgement.
Generalized 3 Hz spike and wave discharges in a child with childhood absence epilepsy. Epilepsy is a neurological condition of recurrent episodes of unprovoked epileptic seizures. A seizure is an abnormal neuronal brain activity that can cause intellectual, emotional, and social consequences. Epilepsy affects children and adults of all ages and ...
Essential tremor (ET), also called benign tremor, familial tremor, and idiopathic tremor, is a medical condition characterized by involuntary rhythmic contractions and relaxations (oscillations or twitching movements) of certain muscle groups in one or more body parts of unknown cause. [6] It is typically symmetrical, and affects the arms ...
In animals, including humans, the startle response is a largely unconscious defensive response to sudden or threatening stimuli, such as sudden noise or sharp movement, and is associated with negative affect. [ 1 ] Usually the onset of the startle response is a startle reflex reaction. The startle reflex is a brainstem reflectory reaction ...