Tongue Flashcards
foramen cecum
it is an embryological remnant and marks the site of the upper end of thyroglossal duct
types of papillae present on the anterior 2/3 of tongue
filiform papillae
fungiform papillae
vallate papillae (along side sulcus terminalis)
mucuous membrane covering the posterior 1/3 has an irregular surface due to the presence of
underlying lingual tonsils
which structure is present lateral to lingual frenulum
deep lingual vein
mucous membrane fold lateral to the lingual vein forms which structure
plica fimbriata
except plattoglossus all tongue muscles are supplied by which nerve
hypoglossal nerve
plattoglossus is supplied by which nerve?
vagus fibers in pharyngeal plexus
protrusion of tongue is done by which muscle?
genioglossus
retraction of tongue is done by which muscle?
styloglossus and hyoglossus
what are the intrinsic muscles of tongue?
longitudinal transverse and vertical
-they alter shape of tongue
action of plattoglossus
pulls root of the tongue upward and backward
narrows oropharyngeal isthmus
depression of tongue is done by which muscle?
hyoglossus
retraction and elevation of posterior third of tongue is done by which muscle?
styloglossus and palatoglossus
arterial supply of tongue
- lingual artery
- tonsillar branch of facial artery
- ascending pharyngeal artery
veinous drainage of tongue goes into
internal jugular vein
lymph from the tip of tongue drains into
submental lymph nodes
lymph from the sides of anterior 2/3 of tongue drains into
submandibular and deep cervical lymph nodes
lymph from the sides of posterior 1/3 of tongue drains into
deep cervical lymph nodes
sensory innervation of anterior 2/3 of tongue
lingual branch of mandibular division of trigerminal nerve (general sensation)
sensory innervation of posterio 1/3 of tongue
glossopharyngeal nerve (gen sensation and taste)
hypoglossal nerve testing
patient is asked to protrude tongue, deviation of tip indicates lesion of the nerve on the side to which deviation occurs, that is the ipsilateral nerve
