ANAT 215 Lecture Notes - Lecture 7: Brainstem, Trapezius Muscle, Soft Palate

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Peripheral nervous system (reading material: chapter 13: page 347-349; chapter 14: pages 375-388; chapter 16: pages 436-446; supplemental reading for interested students chapter 15). Peripheral nervous system (pns): everything outside of the cns. Spinal nerves: to and from the spinal cord. Cranial nerves: go to and from the brain. Somatic: bring in signals from skin, muscles, or joints. Visceral: information from ventral body cavity: motor (efferent) division: Somatic (voluntary) : regulates movement of muscles/bones. Autonomic (involuntary) : regulates heart, smooth muscle, and glands. No way of consciously controlling those structures. Ventral horns; nerve bodies responsible for motor functions. Axons of these cells leave the spinal cord to go to the effector organs, leave via the roots. The components of the roots come together to form the spinal nerve. Once it is free from the bones of the vertebral column, it makes a small posterior branch, and a larger more significant anterior part.

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