Exam (elaborations)
ILE VI- N_V
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Exam of 5 pages for the course testiilvcn at testiilvcn (ILE VI- N_V)
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ILE VI- N/Vpathophysiology
Nausea to retching to vomiting
Vomiting is triggered by
afferent impulses to vomiting center in medulla oblongata
Impulses are received from
sensory receptor
Chemoreceptor trigger zine is outside
BBB so more receptive
Chemoreceptor trigger zone contains receptors for
5-HT3, D2, M1, CB1
CTZ is located in
area postrema of fourth ventricle
cerebral cortex recieves
Higher cortical center
Sensory input
cerebral cortex will send vomiting center impulse in reactions to
Reactions to sight, smells
Anticipatory
The vestibular apparatus has what receptors
M, H1
, vestibular apparatus is located in the
inner ear
vestibular apparatus provides afferent impulses to vomiting center in
response to
changes in equilibrium
there is also visceral afferent signaling from
pharynx and GI tract
visceral afferent signaling affected if
intestinal irritation or delayed GI emptying
receptors related to visceral afferents
5- HT3, D2, M1, NK1, CB1, H1
Vomiting center integrates the afferent impulses and send in
efferent impulses
efferent impulses go to
Salivation center
Respiratory center
Pharyngeal
GI
Abdominal muscles
etilogy of N/V
MI
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