Practical topic 6 Flashcards
Where is the root of the tongue attached?
Hyoid bone
Where is the body of the tongue attached?
To the mandible
Where is the apex of the tongue attached?
Free
Which terms should be mentioned? (ø papillae)
-
Radix linguae
- Attached to hyoid bone
-
Corpus linguae
- Attached to mandible
-
Apex linguae
- Free
-
Frenulum linguae
- Ventral surface connected to the floor of the oral cavity by median fold
-
Dorsum linguae
- The dorsal plane of the tongue
-
Pars gustatoria
- Sense taste, have papillae
- Lyssa
- Sulcus medianus
- Plica palatoglossus
Give the papillae of the tongue (dog)
- Filiform
- Conicae
- Fungiform
- Foliate
- Vallate
Filiform papillae
- Localization
- Type
- On body and apex mainly (several pointed tips directed caudally)
- Mechanical
Conicae papillae
- Localization
- Type
- On the root of the tongue (one pointed tip)
- Mechanical
Foliate papillae
- Localization
- Function
- Among the conicae and filiform papillae (smooth, rounded surface)
- Taste buds / gustatory
Vallate papillae
- Localization
- Function
- At the junction of the body and the root of the tongue
- 4-6 in dogs, arranged i V-shape (apex = caudally)
- Taste buds / gustatory
Give the intrinsic muscles of the tongue
- Fibrae longitudinales superficiales
- Fibrae longitudinales profunda
- Fibrae transversae
- Fibrae perpendiculares
Give the extrinsic muscles of the tongue
- M. styloglossus
- M. genioglossus
- M. hyoglossus
- M. sternohyoideus
- M. mylohyoideus
- M. geniohyoideus
- M. stylohyoideus
- M. thyrohyoideus
- M. sternohyoideus
- M. keratohyoideus
Hører myoidmusklene til?
M. styloglossus
Composed of 3 heads, inserting in the tongue at different levels along its axis.
Origin: Stylohyoid bone
Insertion: Ventral surface of the middle of the tongue, near median plane
Action: Retract tongue
Innervation: N. hypoglossus
M. genioglossus
Origin: Symphysis and the adjacent surface of the body of the mandible
Insertion: Left and right joins at the median plane
Action:
- To depress the tongue:
- Caudal part → profund tongue
- Rostral part → curl apex ventrally
Innervation: N. hypoglossus
M. hyoglossus
Origin: Thyrohyoid and basohyoid
Insertion: Root of tongue
Action: Retract and depress tongue
Innervation: N. hypoglossus
M. sternohyoideus
Origin:
- Sternum
- 1st costal cartilage
- Fused deeper to m. sternohyoideus at the first part
Insertion: Basihyoid
Action: Pull the hyoid bone, root of tongue and the larynx caudally
Innervation: Ramus ventralis of nn. cervicales and sometimes n. hypoglossus
M. mylohyoideus
Origin: Linea mylohyoidea (medial on mandible)
Insertion: Median raphe, on the muscle from the other side
Action: Supports the tongue
Innervation: N. mandibularis
M. geniohyoideus
Origin: Mandibular symphysis (deep to m. mylohyoideus)
Insertion: Basihyoid
Action: Raise basihyoid bone
Innervation: N. facialis
Give the nerves
- N. hypoglossus (cranial nerve XI)
- N. lingualis
- N. glossopharyngeus (cranial nerve IX)
N. hypoglossus
- Type of nerve
- Branches to…
- Innervates
- Motor nerve
- Divides into superficial and deep branch as it enters the tongue
- Innervates intrinsic and extrinsic muscles of the tongue
N. lingualis
- Type of nerve
- Branch of…
- Branches to…
- Innervates
- Sensory nerve
- Branch of V3 (mandibular branch of n. trigemini)
- Divides into deep and superficial branches as it reaches the tongue
- Sensory to the first 2/3 of the tongue
N. glossopharyngeus
- Type of nerve
- Innervates
- Sensory nerve
- Sensory to the caudal third of the tongue
Give the associated arteries
- A. lingualis
- A. sublingualis
A. lingualis
- Ex.
- Runs along with…
- Ex. a. carotis externa, ex. a. carotis communis
- N. hypoglossus
A. sublingualis
Ex.
Ex. a. facialis
Give the associated veins
- V. lingualis
- Arcus hyoideus
- V. lingualis profunda
V. lingualis
Ex.
Ex. v. linguofacialis
Arcus hyoideus
Gives off…
V. sublingualis
V. lingualis profunda
Ex.
Ex. v. lingualis