KINESIOL 1Y03 Lecture Notes - Lecture 20: Autonomic Nervous System, Parasympathetic Nervous System, Sympathetic Nervous System
3 Sep 2018
School
Department
Course
Professor
Document Summary
Split into the parasympathetic nervous system and the sympathetic nervous system. They have main connections that often play a role in maintaining homeostasis. The division of each pns and sns reach the same organs which enables us to have tight regulation of tissues called dual innervation. They innervate smooth muscle, cardiac muscle and glands. The ans is important for creating reflex loops which sense organ function and coordinate an appropriate neural response to maintain homeostasis. Responds to consciously perceived sensations; like ones that come from our skin. Somatic nervous system: innervates skeletal muscles; is monosynaptic; always myelinated. Either you send an ap and the muscle contracts or you don"t send an ap. Autonomic nervous system: innervates cardiac and smooth muscle, and glands; polysynaptic; first neuron is the preganglionic neuron (closest to cns and always myelinated) and synapses with the second postganglionic neuron (always unmyelinated) Organization of the somatic and autonomic nervous systems.
