Mod 4 Muscles Flashcards
Sternocleidomastoid origin
Top of the manubrium and medial ⅓ of clavicle
Sternocleidomastoid insertion
Mastoid process of the temporal bone and lateral portion of superior nuchal line of occiput
Sternocleidomastoid action
Flex neck laterally flex head and neck to same side rotate head and neck to opposite side assist to elevate rib cage during inhale
Sternocleidomastoid nerve
Spinal accessory nerve
Scalenes
Anterior: 361
Middle: 271
Posterior: 672
Nerve: c3-c8
Scalene action
Anterior: flex neck
Lat flex head and neck rotate opposite side elevate ribs on inhale
Splenius capitis origin
Inferior ½ of the ligamemtum nuchae and spinous processes of c7-t4
Splenius capitis insertion
Mastoid process and lateral portion of the superior nuchal line
Splenius capitis actions
Extends head and neck laterally flexes and rotates head and neck to same side
Splenius capitis nerve
Cervical nerve
Levator scapulae origin
Traverse processes of of c1-c4
Levator scapulae insertion
Medial border of scapula between the superior angle and superior portion of spine if scapula
Levator scapulae actions
Elevate and downward rotate the scapula at the scapulothoracic joint extend and lat flex and rotate head to same side
Levator scapulae nerve
Cervical, dorsal scapular nerve
Pectoralis major origin
Medial half of clavicle sternum and cartilage of ribs 1-6
Pectoralis major insertion
Crest if greater tubercle of humerus
Pectoralis major actions
Adducts medial rotates shoulder at g/h joint assist to elevate thorax during force inhale
Upper fibers flex and horizontally adduct shoulder at g/h jt lower extends
Pectoralis major nerve
Med and lat pectoral nerve
Splenius cervicis origin
Spinous processes of t3-t6
Splenius cervicis insertion
Transverse processes of c1-c3
Splenius cervicis actions
Bilaterally extend neck unilaterally lat flex and rotate the neck to same side
Splenius cervicis nerve
Cervical nerve
Pec minor origin
Ribs 3-5
Pec minor insertion
Medial surface of coracoid process of the scapula
Pec minor action
Abduct depress and downward rotate scapulothoracic elevate thorax of forced inhale
Pec minor nerve
Medial pectoral with fibers from communicating branch of lateral pectoral
Longus colli origin
Bodies of c5 through t3 transverse processes of c3-c5
Longus colli insertion
Tubercle on anterior arch of the atlas bodies of axis c3 and c4 transverse processes of c5-c6
Longus colli action
Bilaterally flex neck unilaterally lat flex and rotate neck to same side
Longus colli nerve
C2-c6 (7)
Rectus capitis posterior major
Spinous processes of the axis c2 to the inferior nuchal line of the occiput
Rectus capitis posterior minor
Tubercle of the posterior arch of the atlas c1 to inferior nuchal line of occiput
Oblique capitis inferior
Spinous processes of the axis c2 to the transverse processes of atlas c1
Oblique capitis superior
Transverse processes of axis c1 to between nuchal line of occiput
Rectus capitis posterior major actions
Rock and tilt head back into extension rotate to same side
Rectus capitis minor action
Rock and tilt head back into extension
Oblique capitis superior action
Rock and tilt head back into extension lat flex head to same side
Oblique capitis inferior actions
Rotate head same side
Suboccipital group nerve
Suboccipital nerve
