Cranial Nerve 9&10 ( IX & X) Flashcards
Glossopharyngeal nerve is principally a ____ with preganglionic parasympathetic and few ____
Sensory nerve
motor fibers
Glossopharyngeal has no real nucleus it shares nuclei with
Nerves VII and X
Glossopharyngeal arises from
ventral surface of the medulla, in lateral to olive.
Glossopharyngeal leaves the cranial cavity by passing through the ____ in company with
Jugular nerve
Vagus accessory nerves & internal jugular vein
Glossopharyngeal nerve passes forward between
Internal jugular vein
External carotid artery
Glossopharyngeal Passes at the posterior
border of ____ then lateral to it.
Stylopharyngeus
When glossopharyngeal reaches the pharynx it breaks into
Terminal branches
Glossopharyngeal Motor fiber orignate from ____ & supplys _____ muscles
Nucleus ambiguus
Stylopharyngeus
Glossopharyngeal parasympathetic fibers arise from ____ & supplys _____ muscles
Inferior salivatory nucleus
Parotid gland
Glossopharyngeal special sensory arise from ____ & terminates in _____
- Taste buds on posterior third of the tongue
- Nucleus of solitary tract
Glossopharyngeal general visceral sensory : visceral sensation from mucosa of _____ ends in ____
- Posterior third of tongue
Pharynx
Auditory tube
Tympanic cavity
Carotid sinus - nucleus of solitary tract
Glossopharyngeal nerve lesions produce
- Difficulty of swallowing
- Impairment of taste and sensation over the posterior one-third of the tongue ,palate and pharynx.
- Absent gag reflex. Dysfunction of the parotid gland.
Vagus Nerve arise from
medulla oblongata lateral to olive
Vagus nerve leaves the skull through
Jugular foramen
Vagus nerve occupies the
posterior aspect of the carotid sheath between the internal jugular vein laterally and the internal and common carotid arteries medially.
Vagus nerve lies on
Prevertebral muscles and fascia
Vagus nerve enters ___ through its inlet
thorax
Vagus nerve ( Right) descends in front of
Subclavian artery
Vagus nerve ( left ) descends in between of
Left common carotid
Subclavian arteries
Vagus nerves parasympathetic fibers originate from
Dorsal nucleus of vagus synapses
Vagus nerve motor fibers originate from
nucleus ambiguus to muscles of pharynx and larynx
Vagus nerve visceral sensory fibers carry impulse from carry impulse from viscera in neck, thoracic and abdominal cavities to
Nucleus of Solitary Tract.
Vagus nerve sensory fibers sensation
from auricle, external acoustic meatus and cerebral dura mater, to
Spinal Tract & Nucleus of Trigeminal
Vagus nerve lesions produce
- Palatal and pharyngeal and laryngeal paralysis
- Abnormalities of esophageal motility, gastric acid secretion, gallbladder emptying, and heart rate; and other autonomic dysfunction
the recurrent laryngeal nerve goes round the
subclavian artery on the right, and round the arch of the aorta on the left
The recurrent laryngeal nerve gives motor supply to
all the muscles of the larynx, except the cricothyroid.