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