CP1 - OIANs Flashcards
Upper Trapezius
O: EOP; SNL; ligamentum nuchae
I: lateral 1/3 of clavicle
A: head and C/S flexion, ipsilateral lateral flexion, contralateral rotation, shoulder elevation
N: cervical plexus (C3-C4)
Sternocleidomastoid
O: sternal head- anterior surface of manubrium; superior surface of medial third of clavicle
I: lateral surface of mastoid process of temporal bone; lateral half of superior nuchal line
A: Lateral flexion, contralateral rotation; extends neck, flexes so chin comes to manubrium, extends upper cervical and flexes inferior for chin jut
N: accessory n for motor; cervical 2,3 for pain and proprioception
Scalenes Group (anterior)
O: transverse processes C3-C6
I: 1st rib
A: C/S ipsilateral flexion, contralateral rotation, elevation of 1st rib
N: direct branches of cervical plexus (C 4-6)
Scalenes Group (medial)
O: Posterior tubercle of transverse processes C5-C7
I: superior surface of 1st rib; posterior to groove for subclavian a.
A: elevates 1st rib during forced inspiration; flexes neck laterally
N: anterior rami of cervical spinal nerves
Scalenes group (posterior)
O: posterior tubercles of transverse processes C5-C7
I: external border of 2nd rib
A: elevates 2nd rib during forced inspiration; flexes neck laterally
N: anterior rami of cervical spinal nerves C7 and C8
Levator Scapulae
O: posterior tubercles of transverse processes of C1-C4
I: medial border of scapula superior to root of scapular spine
A: scapular elevation and tilts its glenoid cavity inferiorly by rotating scapula
N: cervical 3 and 4 and dorsal scapular (C5)
(Ilio)psoas minor
O: sides of T12-L1 vertebrae and IVDs
I: pectineal line, iliopectineal eminence via iliopectineal arch
A: act conjointly in flexing thigh at hip joint and in stabilizing the joint
N: anterior rami of lumbar nerves (L2,L3)
(Ilio) psoas major
O: transverse processes of lumbar vertebrae; sides of bodies of T12-L5 vertebrae and IVDs
I: lesser trochanter of femur (by tendon)
A: flexs thigh with ilacus; acting superiorly flexes vertebral column laterally; balance the trunk; acts with ilacus while sitting to flex trunk
N: anterior rami of lumbar n L1,L2,L3
(Ilio)psoas: iliacus
O: superior 2/3 of iliac fossa, ala of sacrum, anterior SIJ
I: lesser trochanter and shaft inferior to it; greater psoas tendon
A: flexion of thigh and stabilizes hip joint; acts with psoas major
N: femoral n
Piriformis
O: anterior surface of sacrum; sacrotuberous ligament
I: superior border of greater trochanter of the femur
A: lateral rotation of extended thigh and abduct flexed thigh; steady femoral head in acetabulum
N: branches of anterior rami of S1,S2
Quadratus Lumborum
O: iliolumbar ligament and internal lip of iliac crest
I: medial half of inferior border of 12th ribs and tips of lumbar TPs
A: extends and laterally flexes vertebral column; fixes 12th rib during inspiration
N: anterior branches of T12, L1-L4 spinal nn.
Latissimus Dorsi
O: spinous processes of T7- T12; thoracolumbar fascia; ribs 9-12; posterior 1/3 of iliac crest
I: floor of intertubercular sulcus of humerous
A: extends, addicts, and medially rotates humerous; raises body toward arms while climbing
N: thoracodorsal n. (C6-C8)
Erector spinae group
O: Arises by a broad tendon from posterior iliac crest, posterior surface of sacrum, SI ligaments, sacral and inferior lumbar SPs and supraspinatus ligament
I: iliocostalis: Lumborum, thoracis, cervicis- fibers run superiorly to lower ribs; longissimus: thoracis, cervicis, capitis - fibers run superiorly to ribs between tubercles and angles to TPs in thoracic and cervical, and to mastoid process of temporal bone; spinalis: thoracis, cervicis, capitis- fibers run superiorly to SPs in the upper thoracics and to cranium
A: bi- extend vertebral column and head; when back is flexed, control movement via eccentric contraction
N: posterior rami of spinal nerves
