Parotid Region Flashcards
Features of parotid gland
- largest salivary gland
- below external auditors meatus
- overlaps masseter
- skin over it supplied by great auricular N
Capsule of parotid gland
- by investing layer of deep cervical fascia
- fascia splits at angle of mandible
- superficial - adherent to gland, attaches above zygomatic arch
- deep - attached to styloid process, forms stylomandibular ligament
Relations of apex of gland
- overlaps posterior belly of digastric
- cervical branch of facial N and retromandibular V emerge here
Relations of superior surface of gland
- External acoustic meatus
- Temporomandibular joint
- Superficial temporal vessels
- Auriculotemporal N
Relations of superficial surface of gland
- Skin
- Superficial fascia
- Parotid fascia
- Parotid lymph nodes
Relations of anteromedial surface of gland
- Masseter
- Temporomandibular joint
- Ramus of mandible
- Medial pterygoid
- Branches of facial N
Relations of posteromedial surface of gland
- Mastoid process
- SCM
- Posterior belly of digastric
- Styloid process
- External carotid A, facial N
Anterior border of gland
Separates superficial and ant-med surfaces - parotid duct - branches of facial N - transverse facial vessels Emerge from here
Posterior border of gland
Separates superficial and post-med surfaces
Overlaps SCM
Medial border of gland
Separates ant-med and post-med surfaces
Related to lateral wall of pharynx
Arteries within gland
- Ext. Carotid enters thru post-med surface
- Maxillary leaves thru ant-med surface
- Superficial temporal arises from superior surface
Veins within gland
Retromandibular V formed on upper part
Divides into anterior and posterior divisions at lower part
Blood supply of gland
- external carotid and branches
- drains into ext. And int. Jugular
Parasympathetic nerve supply of gland
Inferior salivatory Nucleus - Glossopharyngeal N - Tympanic N - Tympanic plexus - Lesser petrosal N - Otic ganglion - Auriculotemporal N - Gland
Sensory supply of gland
Auriculotemporal
Great auricular
Course of parotid duct
Emerges from middle of anterior border
Runs forwards towards masseter
Pierces buccinator
Opens into mouth opposite upper second molar
Superior relations of parotid duct
Accessory parotid gland
Transverse facial vessels
Buccal branch of facial N
Inferior relations of parotid duct
Lower buccal branch of facial N
