Spinalis Cervicis | Spinalis Capitis | Serratus Posterior Superior | Serratus Posterior Inferior | Splenius Cervicis | Splenius Capitis | Semispinalis Capitis |
O- Spinous process of T2- C6 | O- T5- C7 spinous process and C4- C6 articular process | O- Spine of T2- C7 | O- Spine of T11- L2 | O- Spinous process of T3- T7 | O- Spinous process of C7- T3 and ligamentum nuchae | O- TPs of C7- T7 and articular process of C4-6 |
I- Spinous process of C2- C4 | I- Occipital bone and nuchal line | I- Angle of the 2- 5th rib | I- Lower four ribs | I- TPs of C1- C3 | Mastoid process of tempoaral bone and the adjacent medial occipital bone | I- Occipital bone and nuchal line |
A- Extends the spine | A- Extends the cervical and the head | A- Elevates the ribs | A- Draws the ribs inferior | A- Bilaterally extends the spine, unilaterally causes rotation to the same side and lateral flexion of same side | A- Extends the head bilaterally and unilaterally they laterally flex the neck and cause rotation to the same side | A- Extends the head and neck and rotates it to the opposite side |