Lab: Muscle Actions Flashcards
Splenius Capitis
Laterally flex head and rotate face to side; bilaterally extend head
Splenius Cervicis
Laterally flex and rotate neck; bilaterally extend neck
Iliocostalis Lumborum
Extension, lateral flexion, rotation of L spine; lateral movement of pelvis
Iliocostalis Thoracis
Extension, lateral flexion T spine
Iliocostalis Cervicis
Extension, lateral flexion, rotation lower C spine
Longissimus Thoracis
Lateral flexion T spine and ribs (L spine inadvertently); bilaterally act in extension of T and L spine, hold T and L spine erect (increases L lordosis); lateral movement of pelvis
Longissimus Cervicis
Lateral flexion of neck; bilaterally extend neck
Longissimus Capitis
Rotate and laterally flex head; bilaterally extend head
Spinalis Thoracis
Extend T spine
Spinalis Cervicis
Lateral flexion and rotation of head; bilaterally extend head
Spinalis Capitis
Lateral flexion and rotation of head; bilaterally extend head
Semispinalis Thoracis
Extension, rotation, and lateral flexion of upper T and lower C spine; bilaterally extend T spine
Semispinalis Cervicis
Extension, rotation, and lateral flexion of C spine; bilaterally extend neck
Semispinalis Capitis
Turns face to side; bilaterally extends head (neck inadvertently)
Rectus Capitis Posterior Major
Turns face to side; bilaterally extends head
Rectus Capitis Posterior Minor
Extends head
Obliquus Capitis Superior
Lateral flexion of head; bilaterally extends head
Obliquus Capitis Inferior
Turns face to side
Quadratus Lumborum
Steadies origin of diaphragm; when pelvis is fixed, it will laterally flex L spine; bilaterally extends L spine; stabilizes and depresses 12th rib
Serratus Posterior Superior
Elevate upper 5 ribs in inspiration
Serratus Posterior Inferior
Draws lower 4 ribs down and back; forced inspiration
Longus Colli
Flexion and extension of neck; rotation to contralateral side
Longus Capitis, Rectus Capitis Anterior
Flex head
Rectus Capitis Lateralis
Laterally flex head to ipsilateral side