tongue Flashcards
what are the 4 functions of the tongue?
taste
mastication
swallowing
speech
what are the 5 parts of the tongue?
apex- against incisor teeth margin- rests against teeth and gums dorsum- upper inferior surface- lower root -base
the sulcus terminalis is a V shaped groove that divides the tongue into?
oral part- anterior 2/3
oropharyngeal part- post 1/3
what is the foramen located at the apex of the V of the sulcus terminalis?
foramen cecum
what is the median groove?
shallow groove visible on the surface of the tongue
what are the 4 lingual papillae?
filiform
fungiform
vallate
foliate
which of the papillae are the largest and contain taste buds?
vallate papillae- V shaped row in front of sulcus terminalis
which papillae are grooves and ridges along the margin of the tongue and contain taste buds?
foliate- poorly developed in humans
what is a mass of lymphoid tissue found on the oropharyngeal surface of the tongue?
lingual tonsil
what are the 2 folds that connect the tongue to the epiglottis?
median and lateral glossoepiglottic fold
what is the space on either side of the median glossoepiglottic fold?
vallecula
ankyloglossia is a condition of the tongue also known as?
tongue tied- has to do with the frenulum being the incorrect length
all of the extrinsic muscle of the tongue are innervated by the hypoglossal nerve except?
palatoglossus- vagus nerve CN X via pharyngeal plexus
what is the origin and insertion of the palatoglossus muscle?
O: soft palate
I: sides of tongue
what is the function of the palatoglossus muscle?
elevate back of tongue
the genioglossus prevents the tongue from falling back and blocking the airway leading to suffocation. This is important during?
general anesthesia
seizure disorders
the general sensation of the anterior 2/3 of the tongue?
lingual nerve-branch of mandibular division of trigeminal
where do we get taste receptors on the anterior 2/3 of tongue?
chorda tympani, branch of facial nerve CN VII
both general sensation and taste of posterior 1/3 of tongue come from?
glossopharyngeal nerve CN IX
what is the blood supply to the tongue?
lingual artery and vein
what are the lymph nodes of the tongue?
submental, submandibular and deep cervical nodes
