Back Musculature

Question 1

Superficial erector spinae: (back)
Iliocostalis,longissimus, and spinalis

Muscle fibers (surrounding the spine)coming from pelvis all the way into the throat

Answer 1

Integrated function:
Eccentrically decelerates spinal flexion, rotation, and lateral flexion
Dynamically stabilizes the spine during functional movements

Question 2

Quadratics lumborum (back)

From iliac crest of pelvis up to rib 12 (last rib)

Answer 2

Integrated function:
Eccentrically decelerates contralateral lateral spinal flexion
Isometrically stabilizes the limbo-pelvic-hip complex

Question 3

Multifidus (back)

Surrounds the spine from throat down to pelvis

Answer 3

Integrated function:
Eccentrically decelerates spinal flexion and rotation
Isometrically stabilizes the spine

Question 4

Latissimus Dorsi (back)

Goes a cross upper back from shoulder to shoulder down into pelvis

Answer 4

Eccentrically decelerates shoulder flexion, abduction, and external rotation
Eccentrically decelerates spinal flexion
Isometrically stabilizes the lumbo-pelvic-hip complex and shoulder