Splenius Muscles (Splenius Capitis and Splenius Cervicis)

Question 1

Splenius Muscles (ORIGIN)

Answer 1

Capitis: Lower half of the nuchal ligament and spinous processes of C7-T3
Cervicis: Spinous processes of T3-T6

Question 2

Splenius Muscles (INSERTION)

Answer 2

Capitis: Mastoid process of the temporal bone and lateral third of the superior nuchal line of the occipital bone

Cervicis: Transverse processes of C1-C3

Question 3

Splenius Muscles (INNERVATION)

Answer 3

Posterior rami of the spinal nerves (C3-C6)

Question 4

Splenius Muscles (BLOOD SUPPLY)

Answer 4

Muscular branches of the aorta and branches of the occipital and transverse cervical arteries

Question 5

Splenius Muscles (ACTION)

Answer 5

Unilateral: Laterally flexes and rotates the head to the same side

Bilateral: Extends the head and neck