NECK MUSCLES Flashcards
Omohyoid INSERTION
hyoid bone (body)
Omohyoid INNERVATION
ansa cervicalis of cervical plexus (c1-C3)
Sternhyoid ORIGIN
manubrium & sternoclavicular joint (post. surface)
Sternohyoid Insertion
Hyoid bone
Sternohyoid INNERVATION
ansa cervicalis of cervical plexus C1-C3
Sternothyroid Origin
manubrium (post. surface)
Sternothryoid INSERTION
Thryoid cartilage
Sternothyroid INNERVATION
ANSA CERVICALIS C2-C3
Thryohyoid ORIGIN
thyroid cartilage (oblique line)
Thyrohyoid INSERTION
HYOID BONE
Thryohyoid INNERVATIO
C1 via hypoglossal N
CN XII
Omohyoid, sternohyoid, sternothryoid ACTION
depresses (fixed) hyoid
draws layrnx and hyoid done for phonation and swallowing
Thryohyoid ACTION
Depresses & fixes hyoid
raises layrnx during swallowing
SCM ORIGIN (ALL)
sternum (manubrium)
clavicle (medial 1/3)
SCM INSERTION
temporal bone- mastoid process
occipital bone- sup. nuchal line
SCM INNERVATION
Motor: accessory N CN 11
Trapezius (descending fibers) ORIGIN
occipital bone
S.P C1-C7
TRAPEZIUS insertion
clavicle (lateral 1/3)
Trapezius INNERVATION
Motor; accessory n CN 11
Suprahyoid muscles ACTION
Raises hyoid bone and depress jaw during swallowing
Infrahyoid muscles ACTION
depresses hyoid bone
Platysma ACTION
depresses and wrinkles skin of lower face and mouth
tenses skin of neck
aids foreced depression of mandible
MUSCLES OF FACIAL EXPRESSION INNERVATION
Facial N
OMOHYOID ORIGIN
scapula (sup. border)
Digastric ant belly ORIGIN
mandible
digastric post belly ORIGIN
temporal bone (mastoid notch, medial to mastoid process)
suprahyoid muscles INSERTION
HYOID BONE
STYLOHYOID ORIGIN
temporal bone (styloid process)
Mylohyoid Origin
mandible (mylohyoid line)
Geniohyoid ORIGIN
mandible (inf. mental spine)
