Tongue Flashcards
Tongue is caudally supported by?
Hyoid b.
Median groove of the tongue is on which side?
Dorsal
Which lingual mucosa is less cornified?
Ventral
Lyssa
- Median filiform structure
2. Stretch receptor
How is root of the tongue separated from the body?
By vallate papillae
2 types of mechanical papillae
- Filiform papillae
2. Conical papillae
3 types of gustatory papillae
- Fungiform
- Vallate
- Foliate
Smallest and most numerous papillae
Filiform
Conical papillae found?
Dorsum of caudal third of tongue
Fungiform papillae found where?
Rostral 2/3 of tongue
Vallate papillae location
2-3 pairs on caudal third of dorsum of tongue in V
Foliate papillae location
Dorsolateral aspect of cd. third of tongue just rostral to palatoglossal fold
Intrinsic mm. of tongue
Not attached to hyoid apparatus
3 extrinsic mm. of tongue
- Styloglossus
- Hyoglossus
- Genioglossus
Most lateral extrinsic m. of tongue
Styloglossus
Styloglossus OIA
O: stylohyoid b.
I: middle of tongue
A: shortens tongue, elevates apex, pulls middle portion laterally
Hyoglossus OIA
O: basihyoid b.
I: cd. 2/3 of tongue
A: retracts and depresses tongue
Most medial extrinsic m. of tongue
Genioglossus
Genioglossus OIA
O: mandibular symphysis
I: ventral surface of tongue
A: draws tongue rostrally and ventrally
2 aa. which supply the tongue
- Lingual a.
2. Sublingual a.
Lingual a. is a direct branch from?
External carotid a.
Sublingual a. is a direct branch from?
Facial a.
How does blood supply drain from tongue/
Sublingual v. →
Lingual v. →
Linguofacial v. →
External jugular v.
5 nn. which innervate the tongue
- Lingual n.
- Chorda tympani
- Vagus n.
- Lingual branch of glossopharyngeal n.
- Hypoglossal n.
Lingual n. is a branch of?
Mandibular n. of trigeminal n.
Chorda tympani is a branch of?
Facial n.
Chorda tympani carries?
Mechanoreceptor and thermoreceptor afferent fibers to whole tongue + some taste fibers
Lingual branch of glossopharyngeal n. innervates?
Caudal 1/3 of tongue
Only motor n. to tongue
Hypoglossal n.
