BIOL 243 Lecture Notes - Lecture 18: Decussation, Control Of Ventilation, Vasomotor Center
21 Nov 2016
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Document Summary
Lateralization= division of labor between hemispheres: left hemisphere- 90% of people. Left hemisphere: controls language, math, and logic. Right hemisphere: visual- spatial skills, intuition, emotion, and artistic and musical skills. Hemispheres communicate almost instantaneously via fiber tracts and functional integration. Communication between cerebral areas and between cortex and lower cns. Association fibers= horizontal; connect different parts of same hemisphere. Commissural fibers= horizontal; connect gray matter of 2 hemispheres. Projection fibers= vertical; connect hemispheres with lower brain or spinal cord. Subcortical nuclei: caudate nucleus, putamen, globus pallidus. Associated with subthalamic nuclei (diencephalon) and substantia nigra (midbrain) Influence muscle movements: role in cognition and emotion, regulate intensity of slow or stereotyped movements, filter out incorrect/inappropriate responses. 3 paired structures: thalamus, hypothalamus, epithalamus. Bilateral nuclei connected by interthalamic adhesion (intermediate mass) Superolateral walls of third ventricle: contains several nuclei; named for location, nuclei project and receive fibers from cerebral cortex. Impulses from hypothalamus for regulation of emotion and visceral function.
