head-bobbing doll syndrome

head-bob·bing doll syn·drome

a congenital disorder manifested as intermittent flexion and extension movements of the head (for example, bobbing), often accompanied by similar movements of the limbs; due to progressive hydrocephalus; most often caused by space occupying lesions (for example, cysts, tumors) in the third ventricle.

head-bob·bing doll syn·drome

(hedbob-in dol sindrōm)
Congenital disorder manifested as intermittent flexion and extension movements of head, often accompanied by similar limb movements.