axial skeleton - muscles of spine and rib cage Flashcards
origins of sternocleidomastoid
sternal head: superior manubrium
clavicular head: medial 1/3 of clavicle
insertion of sternocleidomastoid
mastoid process of temporal bone
actions of sternocleidomastoid
bilateral: head & neck extension
unilateral: lateral flexion & contralateral rotation
origin of anterior scalene
transverse processes of C3-C6
insertion of anterior & middle scalenes
1st rib
actions of anterior, middle, & posterior scalenes
bilateral: neck flexion
unilateral: lateral flexion and contralateral rotation
elevation of 1st & 2nd rib
origin of middle scalene
transverse processes of C2-C7
origin of posterior scalene
transverse processes of C5-C7
insertion of posterior scalene
2nd rib
origins of splenius capitis
ligamentum nuchae & spinous processes of C7-T3
insertions of splenius capitis
mastoid process of temporal bone & lateral portion of superior nuchal line of occiput
actions of splenius capitis
bilateral: head and neck extension
unilateral: lateral flexion and ipsilateral rotation
origin of splenius cervicis
spinous processes of T3-T6
insertion of splenius cervicis
transverse processes of C1-C3
actions of splenius cervicis
bilateral: neck extension
unilateral: lateral flexion & ipsilateral rotation
what are the deep back muscles (erector spinae)
iliocostalis, longissimus, & spinalis
origin of cervicis in iliocostalis
ribs 3-6
origin of thoracis in iliocostalis
ribs 7-12
origin of lumborum in iliocostalis
iliac crest & thoracolumbar aponeurosis
insertion of cervicis in iliocostalis
transverse processes of C4-C6
insertion of thoracis in iliocostalis
ribs 1-6
insertion of lumborum in iliocostalis
ribs 7-12
actions of iliocostalis
trunk extension & ipsilateral flexion of the trunk
origin of capitis in longissimus
transverse processes of T1-T4 & articular processes of C4-C7
origin of cervicis in longissimus
transverse processes of T4-T5
origin of thoracis in longissimus
transverse process of L1-L5
insertion of capitis in longissimus
mastoid process
insertion of cervicis in longissimus
transverse processes of C2-C6