1 - ENT - Head and neck - Salivary gland anatomy Flashcards
Minor salivary glands - how many?
-innervation?
600-1000
above oral fissure - greater petrosal nerve of [VII]
below oral fissure - chorda tympani of [VII]
Major salivary glands - name them and what they secrete
parotid - serous
submandibular - mixed
sublingual - mucus
Parotid gland - relations in 3 directions
posteriorly - upper 1/4 of SCM (mastoid process, zygomatic bone, cartilage of EECanal
anteriorly - overlies posteroir 1/4 of masseter
superiorly - zygomatic arch
What 5 structures are within the parotid gland
facial nerve (artificially divides into superficial 80% and deep 20%) external carotid artery, retromandibular vein, lymph nodes, Parotid duct - STENSONS duct - through buccinator - enters mouth at level of upper second molar
Describe the innervation pathway of the parotid gland
parasympathetic
inferior salivatory nucleus > CN IX glossopharyngeal > otic ganglion > parotid
sympth fibres from superior cervical ganglion
Submandibular gland - relations - wraps around what? fills what? closely related to?
wraps around mylohyoid muscle - superficial lobe fills submandibular triangle - closely related to facial artery, lingual and hypoglossal nerves, submandibular branch of facial nerve
Submandibular gland - what is within gland + what is its path
WHARTONS duct - from middle of deep surface to emerge at papilla to side of lingual frenulum
Submandibular gland - innervation pathways
sympathetic fibres from sup cervical ganglion
parasympathetic …
superior salivatory nucleus > chorda tympani > lingual nerve (V3 branch) > submandibular ganglion > lingual nerve/free fibres > glands
Sublingual gland - where? nerve supply? small duct drainage?
floor of oral cavity, distal to deep lobe of SML gland
same nerve supply as SML gland
many small ducts drain to floor of mouth and Whartons duct
What in salivary glands are thought to be the origin of salivary gland neoplasms
reserve cells
how much saliva is produced in 24h
1-1.5L
