Muscles Of The Back

Question 1

What are the erector spinae:

Answer 1

Spinalis, Longissimus, Iliocostalis.

Extends and side-bends ipsilaterally

Question 2

Interspinalis and Intertransversarii

Answer 2

movement of back extension and support trunk

Question 3

Transverspinalis muscles are

Answer 3

Multifudus, Rotatores, and semispinalis

Posture and stabilizing vertebral column. Extension, lateral flexion,

Question 4

What are Quadratum Lumborum origin, insertion, action, and innervation

Answer 4

Origin: inferior border of the 12th rib

Insertion: Apices of transverse processes of L1-L4, iliolumbar ligament and posterior 3rd of iliac crest

Action: Fixes 12th rib during respiration, lateral flexes trunk and hip hiker

Nerve: Anterior Primary Rami (T12-L3)