GENERAL HISTOLOGY

Detailed explanation-1: -Extrapyramidal tracts : Originate in the brainstem, carrying motor fibres to the spinal cord. They are responsible for the unconscious, reflexive or responsive control of musculature, eg muscle tone, balance, posture and locomotion.

Detailed explanation-2: -Definition. The extrapyramidal system includes a series of pathways in the central nervous system that control the involuntary movements and maintain posture. Structures. Basal ganglia, cerebellum, vestibular nucleus, red nucleus, substantia nigra, subthalamic nucleus, reticular formation. Tracts.

Detailed explanation-3: -Extrapyramidal tracts. The extrapyramidal tracts all originate in the brainstem and do not pass through the pyramids. These tracts all carry motor fibres to the spinal cord that allow for unconscious, reflexive or responsive movement of muscles to control balance, locomotion, posture and tone.

Detailed explanation-4: -Descending tracts are the pathways by which motor signals are sent from the brain to the spinal cord. They are also called motor tracts, due to their involvement in movement coordination. These tracts can be classified by their structural arrangement, into lateral and medial tracts.