KINESIOL 1Y03 Lecture Notes - Lecture 5: Spinal Nerve

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 1Y03
• Professor: Krista Howarth

Document Summary

The parasympathetic and sympathetic system are divisions of the ans. Ans is important for creating reflex loops sense organ function and maintain homeostasis. Pns: sensory (afferent division): transmits action potential from the pns to the, motor (efferent division): transmits action potentials from cns to effector. 2 neuron system: pre-ganglionic neuron attaches to the post-ganglionic: pre is myelinated, post is unmyelinated releases neurotransmitter, the pre-ganglionic and post ganglionic neurons synapse at the autonomic ganglion. Cell bodies within the cns located in either autonomic nuclei of cranial nerve or the lateral horn of the spinal cord. Cannot send an inhibitory action potential skeletal muscles one neuron system cell body located in cns in either motor nuclei of cranial nerve or anterior horn of the spinal cord axon travels directly to target tissue. Increase heart rate: parasympathetic (rest and digest) Originate in lateral horns of the spinal cord in levels t1-l2.