Lecture 14 & 15: Oral Cavity Flashcards
Where is the tongue located?
Oral part (2/3rds) Pharyngeal part (1/3)
whats 3?
NAVL
Describe the sub-lingual gland:
Describe the hard palate:
Describe sensation of the mouth:
CN9 (Glossopharyngeal) posterior tongue
V3 manibular n. -> Lingual branch = General sensation (Also special sensation (taste) = cauda tympani, offshoot of CN7)
CN12 (Hypoglossal) Entire tongue (motor) i.e Intrinsic muscles, genioglossus, hyoglossus, styloglossus EXCEPTION: Palatoglossus (vagus nerve) [FOrms palatoglossus arch]
What are the extrinsic muscles of the tongue?
Palatoglossus
Styloglossus
Hyoglossus
Genioglossus
If laceration to the tongue results in pulsatile bleeding then what structure has been hit and where?
The laceration has passed the hypoglossal muscle has been passed, entering the second potential space filled with vessels (Lingual art.)
Describe the location of the submandibular gand:
Superficial part its in the submandibular space… (the most inferior space of the two) it has the facial art. & vein, part of the hypoglossal nerve.
Deep part of submandibular gland sits in sublingual space (space under tongue), which also contains the sublingual gland + duct, sublingual art + vein, branches of the hypoglossal n. and glossopharyneal n.
What innervates the soft palate?
All soft palate muscles are innervated by the vagus except: Muscular part of tensor vali palantini (V3 -> Medial tegway n.)
What are the muscles of the soft palate?
Muscular part of tensor veli palantini
Levator veli palantini
Palatopharyngeus
Palatoglossus (from underside of aponeurosis)
What three muscles are closely related to the submandibular gland?*
Mylohyoid
Hyoglossus
Genioglossus
Damage to what nerve / its branches would result in ipsilateral weakness of the tongue?
Hypoglossal n.
Except vagus innervation of palatoglossus.
Where does the sublingual and submandibular duct exit?
The sublingual caruncle near the frenumlum of the tongue
What is the blood supply of the sublingual gland? what its innervation? (same as submandibular)
Sublingual artery and submental artery (branch of facial artery)
Veins are same
Chorda tympani innervates (CN7 branch) -> goes to submandibular ganglion
What two muscles does the submandibular duct arise between?
Mylohyoid and hyoglossus muscle
Describe the types of papillae found on the tongue:
Fungiform (general outer tongue)
Filiform (General central tongue)
Vallate papillae (the V shape found towards the back of the tongue before the oropharynx portion of the tongue)
