By LINDA WILSON-PAUWELS, PATRICIA A. STEWART, ELIZABETH J. AKESSON
Authored through an analogous staff that created Cranial Nerves, this booklet presents an easy-to-follow assessment of autonomic nerves. the 1st half describes their constitution and serve as. the second one half addresses autonomic keep an eye on of person organ platforms in a problem-based studying layout. all through, Autonomic Nerves describes afferent pathways, integrating buildings and mechanisms, efferent pathways, and the autonomic effectors. rules of autonomic neurotransmission also are mentioned.
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Authored through an analogous staff that created Cranial Nerves, this ebook presents an easy-to-follow assessment of autonomic nerves. the 1st half describes their constitution and serve as. the second one half addresses autonomic regulate of person organ structures in a problem-based studying structure. all through, Autonomic Nerves describes afferent pathways, integrating buildings and mechanisms, efferent pathways, and the autonomic effectors.
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Extra info for Autonomic Nerves
P a r a s y m p a t h e t i c Afferents E n c o d e Visceral S e n s o r y Information. Parasympathetic afferents from t h e h e a d , thoracic organs, a n d all of t h e abdominal organs, except for t h e distal e n d of t h e gut a n d pelvic organs, e n t e r t h e central nervous system via t h e glossopharyngeal (CN 1X) a n d vagus ( C N X) nerves. Their role is t o direct regulation of t h e internal environment. T h e c e l l bodies of p a r a s y m p a t h e t i c a f f e r e n t s r e s i d e in t h e i n f e r i o r glossopharyngeal ganglion a n d in t h e inferior ( n o d o s e ) vagal ganglion.
S e n s o r y information from t h e semicircular canals is transduced by hair cells within t h e ampullae. The hair cells stimulate t h e peripheral processes of t h e vestibular n e u r o n s , t h e cell bodies of which form t h e v e s t i b u l a r ganglion. Central p r o c e s s e s of t h e v e s t i b u l a r n e u r o n s form t h e v e s t i b u l a r portion of t h e vestibulocochlear nerve (CN VIII). T h e vestibulocochlear nerve carries t h e Autonomic Sensory C o m p o n e n t s Figure 3-9 Salivation is an autonomic response t o special sensory signals.
Postganglionic parasympathetic neurons synthesize acety~cho~ine as their major transmitter and induce the formation of muscarinic receptors in the target cell membranes. 27 28 Autonomic Nerves DEVELOPMENTAL DEFECTS Since t h e autonomic nervous system coordinates t h e life support systems, serious defects in its formation a r e incompatible with life. Developmental defects in t h e autonomic nervous system, therefore, are very rare, but they do occur. Two are described below, a n d a third forms t h e basis of Case Study 2: Megads Colon.
Autonomic Nerves by LINDA WILSON-PAUWELS, PATRICIA A. STEWART, ELIZABETH J. AKESSON