WEEK 11 Flashcards
What is the function of the root of the tongue
anchors tongue to floor of oral cavity proper, mandible, and hyoid bone
Describe the relationship of the body of the tongue to the line
anterior and superior to the line described above
the body is more _______ than the root
mobile
Describe the apex of tongue
most anterior and in contact with that incisor teeth
What are the dorsal surfaces of the tongue
Lingual Tonsil, sulcus terminalis, epiglottis, circumvallate papillae, fungiform papillae, filliform papillae
why is the posterior aspect of the tongue rough?
the lingual tonsil
the oropharynx is the _________ _______ of the posterior 1/3 of the tongue
anterior wall
What are the parts of the ventral surface of the tongue
deep lingual vein, lingual frenulum, sublingual caruncle
what does the sublingual caruncle do
recieve opening of submandibular duct
What is the condition when a person has a short lingual frenulum
tongue tie
What are intrinsic muscles
they have both their attachments within the region
what are extrinsic muscles?
one attachment inside the region and a second attachment outside
What are the intrinsic muscles of the tongue?
superior longitudinal, inferior longitudinal, transverse, vertical
what are the extrinsic muscles of the tongue?
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus
what is the origin of the genioglossus muscle?
Superior genial tubercles
what is the insertion of the genioglossus muscle?
fibres insert along the entire length of the tongue
Hyoid bone
what is the origin of the hyoglossus muscle?
the hyoid bone
what is the insertion of the hyoglossus muscle?
fibres run superiorly and insert into the lateral aspects of the tongue
what is the origin of the styloglossus muscle
styloid process of the temporal bone
what is the insertion of the styloglossus muscle?
posterior 1/3 of the tongue
what is the origin of the palatoglossus?
palatine aponeurosis of soft palate
what is the insertion of the palatoglossus?
posterior lateral tongue
what do all intrinsic muscles do to the tongue?
change shape
what do all extrinsic muscles do to the tongue?
change position
what is the function of the superior longitudinal muscle?
moves tip of tongue superiorly
what is the function of the vertical muscle?
broadens the tongue
what is the function of the transverse muscle?
narrows tongue
what is the function of the inferior longitudinal muscle?
moves the tip inferiorly
what is the function of the genioglossus muscle?
protrudes and depresses tongue
what is the function of the hyoglossus muscle?
depresses lateral aspect of the tongue
what is the function of the styloglossus muscle?
elevates the posterior aspect and retrudes tongue
what is the function of the palatoglossus muscle?
elevates posterior tongue to close the fauces
All tongue muscles are innervated by hypoglossal nerve except for
palatoglossus which is innervated by vagus nerve (through pharyngeal plexus)
what is the role of the mylohyoid and geniohyoid in tongue movement?
support the tongue but aren’t in the tongue