Muscle Attachments Pg 1 Flashcards
SCM Origin
Mastoid process of temporal bone
SCM Insertion
Sternum and clavicle
SCM inervation
motor: accessory nerve
sensory: cervical plexus
SCM Action
Acting alone, tilts head to its own side and rotates it so the face is turned towards the opposite side.
Acting together, flexes the neck, raises the sternum and assists in forced inspiration.
SCM blood supply
occipital artery and the superior thyroid artery
scalenes origin
cervical transverse processes
scalenes insertion
1st and 2nd ribs
scalenes inervation
cervical nerves ( C3, C4, C5, C6, C7)
scalenes blood supply
ascending cervical artery (branch of inferior thyroid artery)
scalenes action
elevation of ribs I&II
Longus Colli origin
Transverse processes of C-5 to T-3
Longus Colli insertion
Anterior arch of the atlas
Longus Colli nerve inervation
C2-C6
Longus Colli blood supply
Ascending Pharyngeal and Vertebral Arteries
Longus Colli action
flexes head and neck
Suboccipitals origin and insertion
several muscles that runs between
the occiput, C1, and C2 both on
the anterior and posterior side
Suboccipitals nerve
suboccipital nerve ( Dorsal ramus of C1)
Suboccipitals blood supply
vertebral artery
Suboccipitals action
extends head
Errector spinae origin and insertion
run from iliac crest, sacrum, spine,
and ribs longitudinally to: spine, ribs, or occiput
Errector spinae artery
supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Errector spinae nerve
posterior rami of spinal nerves
Errector spinae action
acting bilaterally: extend vertebral column and head;
acting unilaterally: laterally flex vertebral column
deep layer of spine (multifidi and rotators) origin
Spinous and transverse process
