Back Muscles Intrinsec Superficial Layer

Question 1

splenius capitis

Answer 1

O: Nuchal Ligament; C3- C7 (spinous processes)
I: Occipital Bone, lateral superior nuchal line; mastoid process
N: Spinal nn. C1-C6 (posterior rami, lateral branches)
A: Billateral: Extends Cervical Spine and head
Unnilateral: Flexes and rotates head to the same side.

Question 2

Splenius Cervicis

Answer 2

O: T3-T6 (spinous processes)
I: C1-C2: (Transverse processes)I
N: Spinal nn. C1-C6 (posterior rami, lateral branches)
A: Billateral: Extends Cervical Spine and head
Unnilateral: Flexes and rotates head to the same side.

Question 3

Serratus Posterior Superior

Answer 3

O: Nuchal Ligament; C7-T3 (spinous processes)
I: 2nd - 4th ribs (superior borders)
N: Spinal nn. T2-T5 (anterior rami)
A: Elevates ribs

Question 4

Serratus posterior Inferior

Answer 4

O: T11-L2 (spinous processes)
I: 8th-12th ribs (inferior borders)
N: Spinal nn. T9-T12 (anterior rami)
A: Depresses Ribs