extrinsic and intrinsic muscles of tongue Flashcards
(20 cards)
Intrinsic Muscles of tongue
superior longitudinal
inferior longitudinal
transverse
vertical
role of intrinsic muscles
alter shape
role of extrinsic muscles
alter position
Extrinsic Muscles of the tongue
genioglossus
hyoglossus
styloglossus
palatoglossus
superior longitudinal
origin and insertion
deep fibrous tissue from epiglottis to hyoid bone
apex and lateral sides
superior longitudinal
action
dorsiflexion- elevates apex upwards
inferior longitudinal
origin and insertion
band at root of tongue and body of hyoid bone
apex and ventral sides
inferior longitudinal
action
ventroflexion- pulls apex downwards
transverse
origin andinsertion
median fibrous septum
lateral margins
transverse
action
narrows and elongates tongue
vertical
origin and insertion
dorsal surface
ventral surface
vertical
action
flattens and broadens tongue
genioglossus
origin and insertion
mental spine of mandible
ventral surface of tongue and body of hyoid body
genioglossus
action
protrudes tongue and depresses centre
hyoglossus
origin and insertion
body and greater horn of hyoid bone
lateral sides
hyoglossus
action
retracts tongue inferiorly
styloglossus
origin and insertion
styloid process of temporal bone
lateral sides
styloglossus
action
elevates and retracts tongue
palatoglossus
origin and insertion
soft palate
lateral sides
palatoglossus
action
elevates root of tongue
closes oropharynx when swallowing
