Maxillary artery: Part 3

Question 1

Maxillary artery: Part 3
AKA

Answer 1

Pterygopalatine part

Question 2

Pterygopalatine part

Answer 2

Pass between heads of lateral pterygoid
Through pterygomaxillary fissure
Lies in front of pterygopalatine ganglion in pterygopalatine fossa

Question 3

Maxillary artery:
Part 3 Branches

Answer 3

Question 4

Posterior superior alveolar a.

Answer 4

As a. enters pterygopalatine fossa
Descends on infratemporal surface of maxilla
- Supply molar and premolar teeth
- Lining of maxillary sinus
- Gums

Question 5

Infra-orbital a.

Answer 5

Can arise with posterior superior alveolar artery
Enters orbital cavity through post prat of infra-orbital fissure
Runs in groove and canal with n.
Emerge in face through infra-orbital foramen, deep to levator labii superioris
Branches:
Orbital: rectus inferior, obliquus inferior, lacrimal sac

Anterior superior alveolar branches: upper incisor and canines, mucous membrane of maxillary sinus

On face run to: medial angle of eye and lacrimal sac (facial a.), nose (dorsal nasal branch of ophthalmic a.), between levator labii superioris and levator anguli oris (facial a., transverse facial a., buccal a.)

Question 6

Greater palatine a.

Answer 6

Through greater palatine canal with n.
Gives off 2-3 lesser palatine aa.
- To soft palate and tonsil
- Anastomose with ascending palatine a.

Through greater palatine foramen
Pass forward in groove to incisive canal
Terminal part pass upwards through canal
Anastomose with sphenopalatine a.
Branches to: gums, palatine glands mucous
membrane of roof of mouth

Question 7

Pharyngeal br.

Answer 7

Through palatovaginal canal with pharyngeal br. from pterygopalatine ganglion
To mucosa of roof of nose, pharynx, sphenoid air sinus, auditory tube

Question 8

A. of pterygoid canal

Answer 8

Can arise from greater palatine a.
Passes backwards in pterygoid canal to supply walls and contents
Branches to: upper pharynx, auditory tube, tympanic cavity

Question 9

Sphenopalatine a.

Answer 9

Terminal part
Through sphenopalatine foramen at post part of superior meatus
Branches = lateral nasal brr.
Anastomose with ethmoidal aa., nasal brr. of greater palatine a.
Help to supply paranasal sinuses
Ends in nasal septum as posterior septal brr.
Anastomose with ethmoidal aa.
1 br descend in groove on vomer to incisive canal
Anastomose with greater palatine a. + septal br of superior labial a.