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OPP Lect 15

QuestionAnswer
Spinal nerves integration into fetal tissues Due to segmental development of the body, nerves form Dermatomes(Skin), Myotome(skeletal muscle), Sclerotome(connective tissue)
Somato-somatic reflex Sensory info enters spinal cord via dorsal root, synapses on a motor neuron which leaves ventral root and synapses on skeletal muscle
sympathetic innervation pathway of somatic body IML--Anterior root--White rami--paravertebral sympathetic chain--Gray rami--spinal nerve **Grey Rami exist all the way up and down the sympathetic chain. White Rami only run from T1-L2
Viscero-Visceral Reflex Visceral afferents enter the spinal cord via Dorsal root, synapse on motor neurons in the lateral horn (Interneurons), exit via anterior root--sympathetic chain--effected organ
Interneurons in the spinal cord Can recieve afferents from somatic or visceral neurons. **They can synapse with motor neurons both visceral and somatic
Afferent Drive Causes Viscero-Somatic and Somato-Visceral reflex. -Afferents from all kinds of sensations both somatic and visceral to interneurons. -leads to a facilitated spinal cord segment (lowering the threshold/excitability) -Leads to abnormal reflexes and SD
Viscero-Somatic Reflexes effect on somatic tissue Pain in the Viscera then causes changes in: -skin (sweat glands) -skeletal muscle -blood vessels -TART
Created by: WeeG
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