KNR 181 Study Guide - Midterm Guide: Sternocleidomastoid Muscle
Document Summary
Flexion, rotation of head: semispinalis capitis (cervicis/thoracis)(19, origin: transverse process of cervical & thoracic vertebrae, insertion: occipital bone, action: rotation and extension, splenius capitis (12,18, origin: spinious process of cervical and thoracic vertebrae, insertion: mastoid process & occipital bone, action: extension (both), lat. Rotation & flexion (one side: splenius cervicus(18, origin: spinious process of thoracic vertebrae, insertion: transverse process of cervical vertebrae, action: extension of cervical spine/neck, spinalis capitis (erector spinae)(12, origin: spinious process of cervical & lumbar vertebrae, insertion: occipital bone, action: extension of head at the neck, spinalis cervicis & thoracis (erector spinae)(19, origin: process of cervical & lumbar vertebrae, insertion: superior spinious processes, action: extension of upper spine/back. Iliocostalis thoracis & lumborum (19) (erector spinae: origin: illac crest, sacrum, ribs, insertion: upper ribs, transverse process, action: extension & lateral flexion of spine & back, quadratus lumborum (19, origin: illac crest, insertion: transverse process of lumbar vert.
