Q16 Erector Spinae

Question 1

Give the position of this muscle mass

Answer 1

Posterior in the trunk. Midline on eitherside of the vertebral column from sacrum to skull

Question 2

Name the members of this muscle group

Answer 2

Spinalis, Longissimus, Iliocostalis

Question 3

State the proximal and distal attachments

Answer 3

Proximal - Spinous and transverse processes T11 - L5, Iliac crest and Sacrum. Thoraco Lumbar fascia. Distal - Spinous processes, Transverse processes and posterior rib angles to C2 and Nuchal lines of the Occiput

Question 4

Unilateral actions

Answer 4

Ipsilateral side flexion and rotation

Question 5

Bilateral actions

Answer 5

Extension of the trunk, spine