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Cervical Muscles
ORIGIN, INSERTION, ACTION BILATERALLY, ACTION UNILATERALLY
Muscle | Origin | Insertion | Actiona Bilaterally | Action Unilaterally |
---|---|---|---|---|
Prevertebral Group | Play a role in neck flexion | Postural control | ||
Postvertebral Group | Splenius Capitis | Splenius Cervicis | ||
Splenius Capitis | Spinous processes of C7-T3 | Lateral occiput and mastoid process | Neck and head extension | Lateral bending and rotation of the head and neck to same side |
Splenius Cervicis | Spinous processes of T3-T6 | TVP's of C1-C3 | Neck and head extension | Lateral bending and rotation of head and neck to same side |
Suboccipitals | Flexion, extension, lateral bending, and rotation of the head | |||
Sternocleidomastoid | Sternum and clavicle | Mastoid Process | Flexion of the neck | Lateral bending and rotation of head and neck to same side |
Scalenes (anterior, middle and posterior) | TVP's of cervical vertebrae | Ribs 1-2 | Flexion of the head and neck | Laterally bending and rotation of head and neck to same side |