Back Muscles

Question 1

Superficial Erector spinae: iliocostals, longissimus, and spinalis

Answer 1

Accelerated spinal extension, rotation, and lateral flexion

*muscles basically surrounding spinal cord running from cervical neck region to iliac crest of pelvis)

Question 2

Quadratus Lumborum

Answer 2

Spinal lateral flexion

Within lumbar region, below 12th rib

Question 3

Multifidus

Answer 3

Concentrically accelerates spinal extension and contra lateral rotation

*encases spinal cord

Question 4

Lat dorsi

Answer 4

Accelerates shoulder extension, adduction, and internal rotation