Health Sciences 3300A/B Chapter Notes - Chapter 16: Autonomic Nervous System, Enteric Nervous System, Cranial Nerves

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 3300A/B
• Professor: Dan Belliveau

Document Summary

The structures that make up the nervous system are the brain, 12 pairs of cranial nerves and their branches, the spinal cord, 31 pairs of spinal nerves and their branches, sensory receptors. Anatomically the nervous system consists of 2 divisions: the central nervous system which consists of the brain and spinal cord, the peripheral nervous system which is all nervous tissue outside the cns. Functionally the nervous system integrates all body activities by sensing changes (sensory functions) interpreting them (integrative function), and reacting to them (motor functions) Motor (efferent) neurons carry information from the brain toward the spinal cord or out of the brain and spinal cord into cranial or spinal nerves. Components of the pns includes the somatic nervous system (sms) and autonomic nervous system (ans) The sns consist of somatic sensory neurons that conduct impulses from somatic and special sense receptor to the cns (input) and somatic motor neurons from the cns to skeletal muscles (output)