Hypotension: pathologically impaired muscular tone. Impaired resting tone. Reduced and delayed resistance during passive movements.
Asynergy: impaired coordination of muscles active during movements that require participation across multiple joints.
ataxia: jerky and uncoordinated movements often within a particular body part; Bene-ataxia, ARM-ataxia, etc.
Dysmetry. inability to move a body part(arm, leg) to a predetermined place. Illustrated by, for example, the "finger-nose test" where the person to be examined is asked to touch the tip of the nose with closed eyes, at a fast pace, with alternately right and sometimes left index finger. In case of cerebellum injury, the tip of the nose is more or less grossly missed.
Dysdiadochokinesis. inability to quickly perform alternating movements; e.g. outward and inward rotation of the hands ("spin" the hands).
Nystagmus. involuntary conjugate eye movements in such a way that both eyes move, usually horizontally, slowly in one direction and then very quickly return in the other direction. Thus, the nystagmus phenomenon includes a slow and a fast phase. The direction of the nystagmus is indicated by the rapid phase; e.g. "horizontal left-sided nystagmus". Here, the direction also indicates which cerebellar hemisphere is damaged.
Intention tremor. involuntary tremor of the arm or leg when a volitional movement is performed. The tremor gets worse the closer the target limb gets. The tremor ceases at rest.
Titubation = tremors involving the entire trunk in standing and during movement.