suprahyoid muscles and extrinsic muscles of the tongue Flashcards
what is the origin and insertion of the digastric muscle?
O: posterior belly- mastoid process
anterior belly- digastric fossa
I: hyoid bone by intermediate tendon which connects them
what is the origin and insertion of the mylohyoid muscle?
O: mylohyoid line
I: body of hyoid, median raphe
what is the origin and insertion of the geniohyoid?
O: inferior mental spine
I: body of hyoid bone
what is the origin and insertion of the genioglossus muscle?
O: superior mental spine
I: tip and entire undersurface of tongue
what is the origin and insertion of the hyoglossus muscle?
O: body and greater horn of hyoid bone
I: sides of tongue
a small portion of the hyoglossus muscle may take origin from the lesser horn of the hyoid bone. This is called?
chondroglossus
the origin and insertion of the styloglossus muscle?
O: styloid process
I: sides of tongue
what is the origin and insertion of the stylohyoid muscle?
O: styloid process
I: body of hyoid bone
what is the nerve supply to the digastric muscle?
posterior belly-cervical branch of facial nerve
anterior belly- nerve to mylohyoid CN V
what is the nerve supply to the mylohyoid muscle?
nerve to mylohyoid
what is the nerve supply to the geniohyoid muscle?
C1 fibers through hypoglossal
what is the nerve supply to the genioglossus, hyoglossus and styloglossus muscle?
hypoglossal nerve
what is the nerve supply to the stylohyoid muscle?
facial nerve
what is function of the digastric, mylohyoid, geniohyoid and stylohyoid muscles?
elevate the hyoid bone
what is the function of the genioglossus muscle?
stick tongue out (draw forward and protrude)
