Deep Back Muscles

Question 1

Serratus Posterior Superior

Answer 1

O: Nuchal Ligament and Spinous Processes C7-T3
I: Superior Border of Ribs 2-4
A: Elevate Ribs
Inn: Intercostal N 2-5

Question 2

Serratus Posterior Inferior

Answer 2

O: Spinous Processes T11-L2
I: Inferior border of ribs 8-12
A: Depress ribs
Inn: Anterior Rami T9-T12

Question 3

Splenius Capitus

Answer 3

O: Nuchal Ligament and Spinous Processes C7-T4
I: Mastoid Process and Superior Nuchal Line
A: Bi - Ext neck/Uni - Rotate same side and lateral flexion
Inn: Dorsal Rami C2-C6

Question 4

Splenius Cervicis

Answer 4

O: Nuchal Ligament and Spinous Processes C7-T4
I: Transverse processes C1-C4
A: Bi - Ext Neck/ Uni- Rotate same side and lateral flexion
Inn: Dorsal Rami of C2-C6

Question 5

What are the erector Spinae muscles from lateral to medial?

Answer 5

Iliocostalis
Longissimus
Spinalis
(I Love Spinach)

Question 6

What is the “common tendon” of the erector spinae and multifidus?

Answer 6

Thoracolumbar aponeurosis: Posterior iliac crest, sacrum, sacroiliac and sacrospinous ligaments

Question 7

Iliocostalis

Answer 7

O: Common Tendon (Thoracolumbar aponeurosis)
I: Angle of ribs and transverse processes C4-C7
A: Bi - extends VC / Uni - Laterally flexes VC
Inn: Dorsal Rami of Spinal N’s

Question 8

Longissimus

Answer 8

O: Common Tendon
I: Angle of ribs 3-12 and transverse processes of C4-C7, T1 - T12 and mastoid process
A: Bi - Extend VC / Uni - Lateral Flex VC
Inn: Dorsal Rami of Spinal N’s

Question 9

Spinalis

Answer 9

O: Spinous processes T11- L2
I: Spinous processes of C4-C7, T1 -T8
A: Bi - Extend head & neck / Uni - rotates head to contralateral side
Inn: Dorsal Rami of Spinal N’s

Question 10

Semispinalis Cervicis

Answer 10

O:Transverse processes T1-T6
I: Spinal Process of C2-C5
A: Bi - Extends VC / Uni - Rotates to contralateral side
Inn: Dorsal Rami of spinal n’s

Question 11

Multifidus

Answer 11

O: Common erector spinae aponeurosis
I: Spinous processes of superior 2-3 vertebrae
A: Bi - Extends VC / Uni - Rotates contralateral side
Inn: Dorsal Rami of spinal n’s

Question 12

Rotatores (Longus and Brevis)

Answer 12

O: Transverse processes
I: Brevis - spinous process of 1 segment superior / Longus - spinous processes of 2 segment superior
A: Stabilize vertebrae, assist with extension and rotation.
Inn: Dorsal Rami of Spinal N