Muscles of the Neck Flashcards
sternocleidomastoid (origin)
manubrium sterni and medial third of clavicle
sternocleidomastoid (insertion)
mastoid process of occipital and temporal bone
sternocleidomastoid (nerve)
spinal part of accessory nerve and C2 and C3
sternocleidomastoid (action)
two muscles acting together extend head and flex neck, one muscle rotates head to opposite side
digastric posterior belly (origin)
mastoid process of temporal bone
digastric posterior belly (insertion)
intermediate tendon is held to hyoid bone by fascial sling
digastric posterior belly (nerve)
facial nerve
digastric posterior belly (action)
elevates hyoid bone and depresses mandible
digastric anterior belly (origin)
body of mandible
digastric anterior belly (insertion)
intermediate tendon is held to hyoid bone by fascial sling
digastric anterior belly (nerve)
nerve to mylohyoid
digastric anterior belly (action)
elevates hyoid bone and depresses mandible
stylohyoid (origin)
styloid process
stylohyoid (insertion)
body of hyoid bone
stylohyoid (nerve)
facial nerve
stylohyoid (action)
elevates hyoid bone
mylohyoid (origin)
mylohyoid line of body of mandible
mylohyoid (insertion)
body of hyoid bone and fibrous raphe
mylohyoid (nerve)
inferior alveolar nerve
mylohyoid (action)
elevates hyoid bone and floor of mouth; depresses mandible
geniohyoid (origin)
inferior mental spine of mandible
geniohyoid (insertion)
body of hyoid bone
geniohyoid (nerve)
first cervical nerve
geniohyoid (action)
elevates hyoid bone and depresses mandible
sternohyoid (origin)
manubrium sterni and clavicle
sternohyoid (insertion)
body of hyoid bone
sternohyoid (nerve)
ansa cervicalis; C1, C2, C3
sternohyoid (action)
depresses hyoid bone
sternothyroid (origin)
manubrium sterni
sternothyroid (insertion)
oblique line on lamina of thyroid cartilage
sternothyroid (nerve)
ansa cervicalis; C1, C2, C3
sternothyroid (action)
depresses larynx
thyrohyoid (origin)
oblique line on lamina of thyroid cartilage
thyrohyoid (insertion)
lower border of body of hyoid bone
thyrohyoid (nerve)
first cervical nerve
thyrohyoid (action)
depresses hyoid bone and elevates larynx
omohyoid inferior belly (origin)
upper margin of scapula and suprascapular ligament
omohyoid inferior belly (insertion)
intermediate tendon is held to first rib and clavicle by fascial sling
omohyoid inferior belly (nerve)
ansa cervicalis; C1, C2, C3
omohyoid inferior belly (action)
depresses hyoid bone
omohyoid superior belly (origin)
lower border of body of hyoid bone
omohyoid superior belly (insertion)
intermediate tendon is held to first rib and clavicle by fascial sling
omohyoid superior belly (nerve)
ansa cervicalis; C1, C2, C3
omohyoid superior belly (action)
depresses hyoid bone
scalenus anterior (origin)
transverse processes of third, fourth, fifth, and sixth cervical vertebrae
scalenus anterior (insertion)
first rib
scalenus anterior (nerve)
C4, C5, C6
scalenus anterior (action)
elevates first rib; laterally flexes and rotates cervical part of vertebral column
scalenus medius (origin)
transverse processes of upper six cervical vertebrae
scalenus medius (insertion)
first rib
scalenus medius (nerve)
anterior rami of cervical nerves
scalenus medius (action)
elevates first rib; laterally flexes and rotates cervical part of vertebral column
scalenus posterior (origin)
transverse processes of lower cervical vertebrae
scalenus posterior (insertion)
second rib
scalenus posterior (nerve)
anterior rami of cervical nerves
scalenus posterior (action)
elevates second rib; laterally flexes and rotates cervical part of vertebral column