Vagus Nerve

Question 1

Vagus nerve
-also called the____ nerve

has 3 nuclei

• _____ nucleus
• ____ nucleus
• _____ nucleus

Answer 1

wandering

main motor

parasympathetic

sensory

Question 2

longest cranial nerve is the ____ nerve

Answer 2

Vagus nerve

Question 3

Vagus nerve travels from brain to_____

Answer 3

abdominal viscera

Question 4

Which vagus nerve wanders more

Right or left

Answer 4

right vagus nerve wanders more that left vagus nerve

Question 5

main motor nucleus of vagus nerve

• lies_____ to the____ in the medulla oblongata
• formed by _____nucleus
• receives_____ fibers from both cerebral hemispheres
• it’s efferent fibers supply the_____ and_____ muscles

Answer 5

deep

reticular formation

ambiguus

corticonuclear

constrictors of the pharynx

intrinsic muscles of the larynx

Question 6

parasympathetic nucleus of vagus nerve

• lies____ the____ of the lower part of the 4th ventricle ,____ to the hypoglossal nucleus
• receives afferent fibers from the___,_____ nerve(_____reflex)
• the efferent fibers are distributed to the involuntary muscles of the bronchi, heart,esophagus,stomach ,small intestine, and large intestine as far as the_____

Answer 6

beneath

floor

posterolateral

hypothalamus; glossopharyngeal; carotid sinus

distal one-third of the transverse colon

Question 7

Sensory Nucleus of vagus nerve

• lies in the____ part of_____ nucleus
• the central processes of those cells synapse on nerve cells in the nucleus
• efferent fibers from it____ the median plane and____ to the____ group of nuclei of the opposite_____ and ____

Answer 7

lower; nucleus of tractus solitarius

cross; ascend; ventral; thalami and hypothalamus

Question 8

Sensory Nucleus of vagus nerve

from the thalamus, the axons of the thalamic cell pass through the ____ and ___to end in the postcentral gyrus

Answer 8

internal capsule and corona radiata

Question 9

afferent information concerning common sensations enters the brainstem through the____ ganglion of the vagus nerve but ends in the______

Answer 9

superior

spinal nucleus of trigeminal nerve

Question 10

___ forms the dorsal nucleus of the vagus nerve

Answer 10

Parasympathetic nucleus

Question 11

Course of Vagus nerve

• vagus nerve leaves the_____ surface of then____ part of the medulla oblongata as a series of rootlets in the groove between the____ and ____
• leaves the skull through the____
• possess two sensory ganglia:
• superior ganglion that is situated on the nerve____ the jugular foramen
• an inferior ganglion which lies on the nerve_____ the jugular foramen

Answer 11

anterolateral; upper

olive and inferior cerebellar peduncle

jugular foramen

within

just below

Question 12

Course of Vagus nerve

it descend vertically in the neck within the ____with the____ and ___

Answer 12

carotid sheath ; IJV and common carotid

Question 13

Vagus nerve

it gives the following branches in the neck:

• _____
• _____
• _____

Answer 13

meningeal

external acoustic meatus

pharyngeal

Question 14

Pharyngeal branch of the vagus nerve supplies all muscles of the_____ except the____ and all muscles of the____ except the_____

Answer 14

palate; tensor palatini

pharynx; stylopharyngeus

Question 15

THE RIGHT VAGUS NERVE

• enters the thorax and passes posterior to the_____ of ____, contributing to the____ plexus
• also passes the posterior surface of the____ and contributes to the____ plexus

-it then enters the abdomen through the____ opening of the diaphragm (___ vertebral level ). Becomes the_____

Answer 15

root of the right lung
; pulmonary

esophagus; esophageal

esophageal; T10

posterior vagal trunk

Question 16

THE RIGHT VAGUS NERVE

the posterior vagal trunk is distributed to the____ surfaces of the stomach
-it contributes to large plexuses like ____,____,_____plexuses which supply the duodenum,liver, kidney, kidneys, and small and large intestines as far as the distal third of the transverse colon

Answer 16

posterior

coeliac,superior mesenteric and renal

Question 17

Left Vagus nerve

• enters the thorax and crosses the left side of the____ and descends behind the____ of the ___, contributing to the____ plexus
• it then descends on the anterior surface of the esophagus, contributing to the esophageal plexus
• it enters the abdomen through the esophageal opening of the diaphragm and becomes the anterior vagal trunk
• the anterior vagal trunk divides into several branches which are distributed to the____,____,____ and_____

Answer 17

aortic arch

root of the left lung

pulmonary

stomach; liver, upper part of duodenum; head of pancreas