FLEXION: 70 - 90°

- Upper trapezius

- Levator scapulae

- Splenius capitus

- Splenius cervicis

- Longissumus

- Iliocostals

- Spinalis cervicis

EXTENTION: 60°

- Deep neck flexors

- Sternocleidomastoid

- Scalenes

ROTATION: 70 - 90°

IPSILATERAL

- Upper trapezius

- Sternocleidomastoid

- Scalenes

CONTRALATERAL

- Levator scapulae

- Deep posterior cervical muscles

LATERAL FLEXION: 20 - 45°

- Contralateral upper trapezius

- Sternocleidomastoid

- Levator scapulae

- Scalenes

- Deep posterior cervical muscles