the motor system related to the basal ganglia.

clinical features localizable to basal ganglia and/or midline cerebellum

'nonpyramidal'. Refers to pathways involving the basal ganglia ( Ch. 28).

The extrapyramidal system of nerves, located in the brain, helps to coordinate many of the body's movements.

Part of the brain and connections involved in posture and movement. Extrapyramidal side-effects (EPS) are common to several medications, esp. anti-psychotic drugs, and can produce rigidity, tremors, unco-ordinated movements, and/or stooped posture. [ Quick find

Referring to brain structures other than those needed for motor activities.

Latin extra = outside, and pyramidal (q.v.), hence descending nerve tracts that do not traverse the pyramids of the medulla.

involuntary muscle activity.