PHGY 209 Lecture Notes - Lecture 15: Enteric Nervous System, List Of Lumbar Nerves, Spinal Nerve
25 Nov 2017
School
Department
Course
Professor
Document Summary
Afferent = input: cell bodies out of cns. Cranial nerves: somatic, visual, olfactory, taste, auditory, vestibular. Spinal nerves: somatic sensation: touch, temperature, pain. Efferent = motor output: cell bodies in cns. Somatic efferent: only innervates skeletal muscles, only excitatory (ach, motor neurons. Innervates interneurons: smooth and cardiac muscle, excitatory and inhibitory. Enteric nervous system: controls digestive system. Cerebral cortex has 2 parts: 2-3mm of gray matter (composed of cell bodies, white matter (contains the axons, which are myelinated fiber tract) Cervical nerves: 8 pairs: neck, shoulders, arms, hands. Thoracic nerves: 12 pairs: shoulders, chest, upper abdominal wall. Lumbar nerves: 5 pairs: lower abdominal wall, hips, legs. Sacral nerves: 5 pairs: genital and lower digestive track. 12 pairs (no need to know their names and information they carry) Early development of nervous system: ball of cells turns into blastocyst and starts to develop inner cell mass (week 1, week 3: embryonic disk.
