Anatomy and Cell Biology 3319 Lecture Notes - Lecture 6: Basal Ganglia, Commissural Fiber, Internal Capsule
16 Oct 2014
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Identify the main structures that comprise the basal ganglia. 1: compare the direct and indirect striopallidal pathways of the basal ganglia, cerebral cortex (gray matter) Fiber connections of the cerebral cortex of neuronal cell bodies. Association fibers connect neurons to hemisphere through short connections and long connections: commissural fibers run from one hemisphere to the other, corpus callosum is an example of commissural fibers. Summary (overview and 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 2 cerebral hemispheres. The largest of these is the commissural fiber pathway known as the corpus callosum.
