Muscle and isolation function of the Back Musculature

Question 1

Superficial Erector Spinae:

Iliocostalis, Longissimus, and spinalis

Answer 1

Concentrically accelerates spinal extension, rotation and lateral flexion

Question 2

Quadratus Lumborum

Answer 2

Spinal lateral flexion

Question 3

Multifidus

Answer 3

Concentrically accelerates spinal extension and contralateral rotation

Question 4

Latissimus Dorsi

Answer 4

Concentrically accelerates shoulder extension, adduction, and internal rotation