HMB200H1 Lecture Notes - Vestibular Nuclei, Tegmentum, Bulimia Nervosa
Document Summary
The lateral pathways are involved in voluntary movement of the distal musculature and are under direct cortical control. The consist of: corticospinal tracts, rubrospinal tracts. The ventromedial pathways are involved in the control of posture and locomotion and are under brain stem control. They consist of: reticulospinal tract (medullary and pontine, vestibulospinal tract, tectospinal tract. Corticospinal tract is the most important component, originating in the neocortex (motor and somatosensory cortex) Its axons pass through the internal capsule briding the telecephalon and thalamus -> base of cerebral peduncle -> pons -> collect at the medullary pyramid: also called the pyramidal tract. At the junction of medulla and spinal cord, the pyramidal tract decussates, and collect in the lateral column of the spinal cord and form the lateral corticospinal tract that terminate in the dorsolateral region of the ventral horns. Rubrospinal tract is a smaller component of the lateral pathways originating in the red nucleus of the midbrain.
