Splenius Cervicis
Origin- Spinous processes of T-3 to T-6
Insertion- Tranvserse processes of C-1 to C-3
Actions- unilaterally: rotate head and neck to same side, laterally flex head and neck
bilaterally: extend the head and neck
Insertion- Tranvserse processes of C-1 to C-3
Actions- unilaterally: rotate head and neck to same side, laterally flex head and neck
bilaterally: extend the head and neck
Splenius Capitis
Origin- inferior half of ligamentum nuchae and spinouse processes of C-7 to T-4
Insertion- Mastoid process of temporal bone and lateral portion of the superior nuchal line of the occiput
Actions- Unilaterally: Rotate head and neck to same side, laterally flex head and neck to same side
Bilaterally: Extend the head and neck
Insertion- Mastoid process of temporal bone and lateral portion of the superior nuchal line of the occiput
Actions- Unilaterally: Rotate head and neck to same side, laterally flex head and neck to same side
Bilaterally: Extend the head and neck
Suboccipitals
8 total suboccipital muscles
deepest muscles of posterior neck
Act to stabalize the axis and atlas, creating intrinsic movements like rocking and tilting of head
deepest muscles of posterior neck
Act to stabalize the axis and atlas, creating intrinsic movements like rocking and tilting of head