FINALS: Tongue Flashcards
Divides the tongue into right and left
Median fibrous septum
A mass of striated skeletal muscle
Covered with mucous membrane
Tongue
Tongue is attached to the 3
Styloid process
Soft palate - above
Mandible and hyoid bone - below
A v shaped sulcus on the upper surface of the tongue
Divides the tongue into ANT 2/3 (ORAL PART) & POST 1/3 (PHARYNGEAL PART)
Sulcus terminalis
A small pit at the apex of the sulcus
An embryonic remnant, marks the site of the upper end of the thyroglossal duct
Foramen cecum
Three types of papillae on ant 2/3
Filiform
Fungiform
Vallate
Post third of tongue is devoid of papillae but has
Lingual tonsil
A fold of mucous membrane connecting the under surface of the tongue to the floor of the mouth
Frenulum of the tongue
Vein seen On the lateral side of the frenulum
Deep lingual vein
2 types of muscles of the tongue
Intrinsic
Extrinsic
Confined to the tongue
Not attached to bone
Intrinsic muscles
Intrinsic muscles consists 3 types of fibers
Longitudinal
Transverse
Vertical
Nerve supply of inteinsic muscles
Hypoglossal nerve
Action of intrinsic muscles
Alter shape of tongue
Attached to bones and soft palate
Extrinsic muscles
4 extrinsic muscles
Genioglossus
Palatoglossus
Styloglossus
Hyoglossus
Nerve of extrinsic fibers
Hypoglossal nerve
Movts of tongue PRDRS
Protrusion Depression Retraction Retraction and elevation of post third Shape changes
Muscles in Protrusion
Genioglossus
Muscles: retraction
Styloglossus
Hyoglossus
Muscles: depression
Hyoglossus
Muscles: retraction and elevation of post 3rd
Styloglossus
Palatoglossus
Muscle: shape changes
Intrinsic muscles
Blood supply of the tongue 3
Lingual artery
Tonsilar branch of facial artery
Ascending pharyngeal artery
The veins of tongue drains into the
Ijv
Lymph drainage
Tip:
Sides of ant 2/3:
Post 3rd:
Tip: submental lymph nodes
Sides of ant 2/3: submandibular and deep cervical lymph nodes
Post 3rd: deep cervical lymph nodes
Sensory innervation on the ant 2/3
Lingual nerve branch of mandibular division of trigeminal nerve
CHORDA TYMPANI Branch of the Facial nerve
Sensory innervation of post 3rd
Glossopharyngeal nerve
