Vagus Nerve

Question 1

Development?

Answer 1

Sensory ,motor & parasympathetic fibers

In association with branchial arches

Question 2

Exit from brain?

Answer 2

Behind the olive close to IX&XI nerves

Question 3

Exit from skull?

Answer 3

Jugular foramen

Question 4

General character?

Answer 4

General somatic sensory 
General visceral sensory 
General visceral motor 
Special visceral motor 
Special visceral sensory

Question 5

Parts?

Answer 5

Cranial
Cervical
Thoracic
Abdominal

Question 6

Branches of cranial & it’s innervation & topography ?

Answer 6

Meningeal(meninges)- from superior ganglion & passes to cranial dura matter in posterior cranial fossa
Auricular (skin of external surface of auricle& posterior wall of external acoustic meatus)- from superior ganglion & passes over mastoid canaliculi of temporal bone

Question 7

Branches of cervical ,innervation & topography?

Answer 7

Pharyngeal (wall of pharynx)-throat,palatopharyngeus ,palatoglossus muscles
Superior cervical cardiac- passes downward common carotid artery (thyroid gland & thymus)
Superior laryngeal -arises from inferior ganglion of vagus nerve (tunica mucosa of pharynx & tongue )
Recurrent laryngeal (right & left) - passes upward between oesophagus & trachea;tunica mucosa of larynx and its muscles

Question 8

Branches of thoracic part & innervation?

Answer 8

Bronchial branch - forms pulmonary plexus (lungs )

Oesophagus- forms esophageal plexus (surface of oesophagus)

Question 9

Branches of abdominal, topography & innervation?

Answer 9

Anterior vagal trunk - front surface of stomach (anterior gastric,liver or hepatic branches)
Posterior vagal trunk- posterior wall of stomach (posterior gastric,coeliac branches)