PSYC 2240 Chapter Notes - Chapter 2: Positron Emission Tomography, Meninges, Intellectual Disability

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Has some of its cell bodies within the brain or spinal cord, some clustering around the sides. Somatic: controls voluntary movements of skeletal muscles. Spinal cord: part of the cns within the spinal column. Communicated with all the sense organs and muscles except those of the head: segmented and each segment has a sensory nerve on one side(dorsal) and a motor nerve on the other (ventral) Dorsal root ganglia: cell bodies of the sensory neurons are in clusters of neurons outside the spinal cord. Grey matter: densely packed with cell bodies and dendrites: many send axons to the brain or other parts of the spinal cord through the white matter. Each segment of spinal cord sends sensory information to the brain and receives motor command from the brain. Neurons that receive information from and send commands to the heart, intestines and other organs. Both sympathetic and parasympathetic are constantly active. Cell bodies in clustered outside the spinal cord.

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