Pharynx

Question 1

Hypoglossal nv palsy tongue deviation to

Answer 1

Weak side due to unopposed action of genioglossus

All muscles of tongue are supplied by hypoglossal except palatoglossus ( supplied by vagus)
Palatoglossus has a retraction action on posterior part of tongue whereas genioglossus protrude the tongue and pushes tongue to opposite side
Therefore in hypoglossal nv palsy the genioglossus of opposite side( n side) will push the to tongue to the affected side

Question 2

Ca of base of tongue pain referred to ear through which nv

Answer 2

Cn 9
Base of tongue (ie. posterior 1/3) is supplied by glossopharyngeal nv the branch of which is also given in middle ear ( Jacobson’s nv)

Question 3

Nv supply of anterior 2/3

Posterior most part of tongue

Answer 3

Lingual (br of mandibular) referred pain to ear via auriculotemporal br of mandibular
Cn 10 referred pain to ear via arnolds nv

Question 4

Structures passing via foramen of morgagni

Answer 4

Gap b/w skull and superior constrictor
 Structures passing
TALAA (+4 palati)
Tensor palati
Palatine branch of Ascending pharyngeal
Ascending Palatine artery
Levator palati
Auditory tube

Question 5

Zenkers diverticulum

Answer 5

False diverticulum only mucosa and fascia outpouch

Question 6

All muscles of tongue are derieved from occipital myotomes except

Answer 6

Palatoglossus

All muscles are supplied by hypoglossal except palatoglossus supplied by pharyngeal plexus