Physiology 2130 Lecture Notes - Lecture 2: Striatum, Somatotopic Arrangement, Proprioception

• School: Western University
• Department: Physiology
• Course: Physiology 2130
• Professor: Anita Woods

Document Summary

Interneurons: make up the cns: link between afferent and efferent neurons. The hypothalamus is the head ganglion of the autonomic nervous system. The ans is found throughout the entire neural axis: the key component is the hypothalamus, the ans is divided into the sympathetic and parasympathetic ns. Morphology of the psns long preganglionic axons: short post ganglionic axons very specific targeting, postganglionic neuron embedded in effector organ. Sympathetic nervous system: preganglionic connects to postganglionic neuron for all effectors. Except adrenal gland where preganglionic connects to chromaffin cell (adrenal medulla: preganglionic to postganglionic neuron releases acetylcholine, postganglionic neuron to effector organ releases norepinephrine (noradrenaline) Except adrenal gland releases both epinephrine and norepinephrine: norepinephrine acts at (heart and coronary blood vessels) or receptors (blood vessels) *note: sympathetic postganglionic neuron to blood vessel in skeletal muscle releases acetylcholine. Autonomic nervous system: throughout neuroaxis-head is the hypothalamus, two divisions psns and sns usually antagonistic, but sometime work in a cooperative or complementary manner.