PSYCH261 Chapter Notes - Chapter 8.3: Lateral Corticospinal Tract, Corticospinal Tract, Tectospinal Tract
29 Oct 2018
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Document Summary
Decerebrate: describes an animal whose brain stem has been transected. Decerebrate rigidity: simultaneous contraction of agonistic and antagonistic muscles; caused by decerebration or damage to the reticular formation. Clasp-knife reflex: a reflex that occurs when force is applied to flex or extend the limb of an animal showing decerebrate rigidity; resistance is replaced by sudden relaxation. Somatotopic organization: a topographically organized mapping of parts of the body that are represented in a particular region of the brain. Supplementary motor area (sma: a region of motor association cortex of the dorsal and dorsomedial frontal lobe, rostral to the primary motor cortex. Premotor cortex: a region of motor association cortex of the lateral frontal lobe, rostral to the primary motor cortex. Lateral group: the corticospinal tract, the corticobulbar tract, and the rubrospinal tract. Ventromedial group: the vestibulospinal tract, the tectospinal tract, the reticulospinal tract, and the ventral corticospinal tract.
