MAXILLARY ARTERY Internal maxillary artery Larger terminal branch

MAXILLARY ARTERY

Internal maxillary artery. Larger terminal branch of external carotid artery. Arises within substance of parotid. Has 3 parts: 1 st or mandibular part. 2 ndor pterygoid part. 3 rd or pterygopalatine part

BRANCHES 1 ST PART: Deep auricular. Anterior tympanic. Middle meningeal. Accessory meningeal. Inferior alveolar Accompany branches of mandibular nerve. Passes through the foramina.

BRANCHES 2 ND PART: Deep temporal Masseteric Pterygoid Buccal All branches are muscular. They do not pass through any foramina.

BRANCHES 3 RD PART: Posterior superior alveolar Infra-orbital Greater palatine Pharyngeal Artery of pterygoid canal Sphenopalatine

PTERYGOPALATINE FOSSA

CONNECTIONS

2 nd division of trigeminal nerve. Entirely sensory. Course

BRANCHES In middle cranial fossa. Meningeal branch. • In pterygopalatine fossa. – Ganglionic. – Zygomatic nerve. – Posterior superior alveolar (dental) ZB MB PSA

BRANCHES In infraorbital canal. Middle superior alveolar. Anterior superior alveolar. On the face. Palpebral. Nasal. Superior labial. ASA MSA

Largest peripheral ganglion of parasympathetic system. Present in pterygopalatine fossa. Topographically related to maxillary nerve, functionally with greater petrosal branch of facial nerve.

CONNECTIONS Parasympathetic or motor root: secretomotor to lacrimal, nasal, palatine & pharyngeal glands. Sympathetic root: vasomotor to mucous membrane of nose, palate & nasopharynx. Sensory root: passes without interruption

BRANCHES FOUR SETS. Orbital. Palatine. Nasal. Pharyngeal.

APPLIED ANATOMY Ganglion of hay fever