Actions And Innervations Flashcards
Trapezius
Innervation - spinal accessory nerve, C1-C5 cord levels
Latissimus Dorsi
Innervation - thoracodorsal nerve, ventral rami C6-C8
Levator Scapulae
Innervation - dorsal scapular nerve, ventral Ramus C5 plus ventral rami
C3, C4
Rhomboid Major
Innervation - dorsal scapular nerve, ventral Ramos C5 plus ventral
Ramus C4
Rhomboid Minor
Dorsal scapular nerve, ventral ramus C5 plus ventral ramus C4
Splenius Capitis
Innervation - dorsal rami C3-C5
Actions - Laterally flex head and rotate face to side; bilaterally
Extend head
Splenius Cervicis
Innervation - dorsal rami C5-C7
Action - laterally flex and rotate neck; bilaterally extend neck
Iliocostalis Lumborum
Innervation - dorsal rami lower T, All L
Action - Extension, lateral flexion, rotation of L spine; lateral movement of pelvis
Iliocostalis Thoracis
Innervation - dorsal rami T1-T6
Action - Extension, lateral flexion T spine
Iliocostalis Cervicis
Innervation - dorsal rami T1, T2; rarely C8
Action - Extension, lateral flexion, rotation lower C spine
Longissimus Thoracis
Innervation - dorsal rami T &L nerves
Action - Lateral flexion T spine & ribs (L spine inadvertently); bilaterally act in extension of T & L spine, hold T & L spine erect (increases L lordosis); lateral movement of pelvis
Longissimus Cervicis
Innervation - dorsal rami C4-C8; T1-T2
Action - lateral flexion of neck; bilaterally extend neck
Longissimus Capitis
Innervation - dorsal rami C1-C3, sometimes C4
Action - rotate & laterally flex head; bilaterally extend head
Spinalis Thoracis
Innervation - dorsal rami T & upper L
Action - Extend T spine
Spinalis Cervicis
Innervation - dorsal rami C
Action - Lateral flexion & rotation of C spine; bilaterally extend neck
Spinalis Capitis
Innervation - dorsal rami lower C, upper T
Action - lateral flexion & rotation of head; bilaterally extend neck
Semispinalis Thoracis
Innervation - dorsal rami T1-T6
Action - Extension, rotation, & lateral flexion of upper T & lower C spine; bilaterally extend T spine
Semispinalis Cervicis
Innervation - dorsal rami C6-C8
Action - Extension, rotation, & lateral flexion of C spine; bilaterally extend neck
Semispinalis Capitis
Innervation - dorsal rami C1-C6
Action - turns face to side; bilaterally extends head (neck inadvertently)
Multifidis
Innervation - dorsal rami C3-C8, T1-T2, L1-L5, sometimes S1
Rectus Capitis Posterior Major
Innervation - suboccipital nerve, dorsal ramus C1
Action - Turns face to side; bilaterally extends head
Rectus Capitis Posterior Minor
Innervation - suboccipital nerve, dorsal ramus C1
Action - Extends head
Obliquus Capitis Superior
Innervation - suboccipital nerve, dorsal ramus C1
Action - lateral flexion of head; bilaterally extends head
Obliquus Capitis Inferior
Innervation - suboccipital nerve, dorsal ramus C1
Action - Turns face to side
Quadratus Lumborum
Innervation - ventral rami T12, L1-L3 or L4
Action - steadies origin of diaphragm; when pelvis is fixed, it will laterally flex the L spine; bilaterally extends the L spine; stabilizes & depresses the 12th rib
Serratus Posterior Superior
Innervation - intercostal nerves, ventral rami T2-T5
Action - elevate upper 5 ribs in inspiration
Serratus Posterior Inferior
Innervation - intercostal nerves, ventral rami T9-T11. Subcostal nerve, ventral ramus T12
Action - draws lower 4 ribs down & back; forced inspiration
Longus Colli
Innervation - ventral rami C2-C6, sometimes C7
Action - flexion & extension of neck; rotation to the contralateral side
Longus Capitis
Innervation - ventral rami C1-C3
Action - flex the head
Rectus Capitis Anterior
Innervation - ventral rami C1, C2
Action - flex the head
Rectus Capitis Lateralis
Innervation - ventral rami C1, C2
Action - laterally flex the head to ipsilateral side
Anterior scalene
Innervation - ventral rami C2-C6
Middle Scalene
Innervation - ventral rami C3-C8
Posterior Scalene
Innervation - ventral rami C6-C8