NEUR30003 Lecture Notes - Lecture 12: Autonomic Ganglion, Internal Set, Enteric Nervous System
13 Aug 2020
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Document Summary
Controlling bodily functions including regulation of all organs and most tissues. Definitions: the involuntary nervous system, the visceral motor system (+ blood vessels, sweat glands, etc. ) Smooth and cardiac muscle (excitation - contraction, inhibition - relaxation) Epithelial transport of ions (absorption, secretion: flux of water and ions across a membrane. Hormone and mucous secretion (eg. gut, pancreas, salivary glands) Some tissues have autonomic nerves but no function identified yet. Ans has specific actions at each tissue/organ. Actions can be part of simple reflexes, involve coordinated regulation of multiple sites or associated with a more complex behaviour (eg. stress, anxiety, pain) Integrative: flexible (becomes activated under diff types of circumstances in diff ways) Example: in endocrine system, the ans is essential for: homeostasis (maintaining internal set points critical for survival keeps us alive, allostasis (maintaining balanced system with changing environment or need. Has its own sensory, motor and interneurons (complex reflex circuits) Can be influenced by sympathetic and parasympathetic systems.
