Anatomy and Cell Biology 3319 Lecture Notes - Lecture 6: Pars Compacta, Hypokinesia, Primary Motor Cortex
7 Oct 2016
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The basal ganglia is composed of the deep gray matter of the cerebrum: deepest layer of large collections of neuronal cell bodies. Summary: overview of white matter of the cerebrum. The basal ganglia are deeper neuronal structures of the cerebrum. They lie below the white matter of the cerebral hemispheres. The cerebral cortex is connected by 3 types of fibers including: association, commissural, and projection. There are short association fibers that connect adjacent gyri in the same cortical lobe and long association fibers make connections with different lobes on the same hemisphere. The commissural fibers make connections between the two cerebral hemispheres: the largest of these is the commissural pathway known as the corpus callosum. Projection fibers connect the cerebral cortex to subcortical structures. Afferent and efferent fibers to and from the cortical layer of gray matter merge into a large bundle of fibers, the internal capsule, to distribute to the subcortical parts of the brain.
