BIOS1171 Lecture Notes - Lecture 10: Cranial Nerve Nucleus, Postcentral Gyrus, Anterior Grey Column

• School: University of Sydney
• Department: Biomedical Science
• Course: BIOS1171
• Professor: Jin Huang

Document Summary

Primary motor cortex = precentral gyrus = brod(cid:373)a(cid:374)(cid:374)"s area 4. Contains a layer of pyramidal cells projects to corticospinal tract. Contributes to control of movement of hands. Located on midline surface of hemisphere in front of primary motor cortex. Organises and plans sequences of muscle activation needed for movement. Input form sensory area of parietal cortex. Control of proximal limb positions arm for movement tasks. Brod(cid:373)a(cid:374)(cid:374)"s area 5 = i(cid:374)put fro(cid:373) so(cid:373)atose(cid:374)sor(cid:455) a(cid:374)d vesti(cid:271)ular s(cid:455)ste(cid:373)s. Brod(cid:373)a(cid:374)(cid:374)"s area 7 = pro(cid:272)esses visual i(cid:374)for(cid:373)atio(cid:374) relate to positio(cid:374) of o(cid:271)je(cid:272)ts i(cid:374) spa(cid:272)e. Corticospinal pathways: corticobulbar, lateral corticospinal, anterior corticospinal tracts. Cell body umn > cell body lmn > axon > skeletal muscle. Originates in the cerebral cortex carry motor fibres to the spinal cord and brain stem. Responsible for voluntary muscle control of face and body. Motor cortex > internal capsule > midbrain > pons nuclei > decussates at medulla. Starts at cortex terminates on motor neurons in the spinal cord.