KN 251 Lecture Notes - Lecture 15: Splenius Cervicis Muscle, Splenius Capitis Muscle, Nuchal Ligament
Document Summary
Action: both sides, extends neck || one side, rotates head to same tide. Origin: iliac crest (l), inferior six ribs (t), ribs 3-6 (c) Insertion: angle of ribs (lt), transverse processes of c6 to c4 (c) Action: bilaterally extends vertebral column, unilaterally bends vc to same side. Origin: transverse processes of lumbar through cervical vertebrae. Insertion: transverse process of thoracic and cervical vertebrae; mastoid process. Action of thoracis & cervicis: bilaterally extends vertebral column. , unilaterally bends vc to same side. Action of capitis: bilaterally extends neck, unilaterally turns head/neck same side. Origin: spines of lumbar and lower thoracic vertebrae. Insertion: spines of upper thoracic and cervical vertebrae. Action: helps extend vertebral column and head (capitis) Action: bilaterally extends vertebral column, unilaterally rotate head/neck/spine to opposite side. Action: bilaterally extends vertebral column, unilaterally rotate spine to opposite side. Insertion: spinous process (one or two vertebrae above) Action: bilaterally extends vertebral column; unilaterally rotate spine to opposite side.
