CMD 377 Lecture Notes - Lecture 24: Inferior Parietal Lobule, Superior Parietal Lobule, Inferior Frontal Gyrus

• School: URI
• Department: Communicative Disorders
• Course: CMD 377
• Professor: Kim Mikyong

Document Summary

Neocortex: the gray matter of the majority of the cerebral hemisphere, 95% of the total cortical area of human. Paleocortex: some restricted parts of the base of the telencephalon (olfactory areas) Stellate cells: small multipolar neurons, principal interneurons of the neocortex. Pyramidal cells: principal output neurons, apical dendrites ascend to the cortical surface, dendritic spines on the apical dendrites preferential site of synaptic contact. Fibers to/from other cortical sites: within the same hemisphere association fibers, in the contralateral hemisphere commissural fibers. Fibers to/from subcortical sites projection fibers: most descend through the internal capsule. Corpus callosum: the largest fiber bundle, interconnect two cerebral hemispheres, anterior portion=genu, middle=body, posterior=splenium. Anterior commisure: interconnects parts of the temporal lobes (middle and inferior temporal gyri) Posterior commisure: in midbrain, connecting pretectal areas. Superior longitudinal fasciculus (arcuate fasciculus: connects the frontal lobe to the parietal, occipital, and temporal lobes. Superior occipitofrontal fasciculus: connects the occipital and the frontal lobe, parallel to the corpus callosum.