Muscular Pt. 2 Back Muscles Flashcards
1
Q
Erector Spinae:
A
Deep to trapezius& latissimus dorsi
Made of 3 parallel columns w/ vertical fibers from
Octipial bone to sacrum
2
Q
Erector Spinae Actions:
A
Keeps vertebral column upright
Unilateral contract: flexes waist laterally
Bilateral contract: Extends spine, bend backward
3
Q
Multifidus:
A
Location: Deep to erector Spinae
Multiple short muscles b/w individual vertebra
Action: Synergist to erector spinae
4
Q
Quadratus Lumborum QL:
A
Location: Deep posterior abdom. wall in umbar region
Origin: Illiac crest
Insertion: lumbar vertebrae
5
Q
Quadratus Lumborum QL Action:
A
Unilateral: lateral flexion of spine (posture)
Bilateral: Spinal extension
6
Q
Location of Trapezius:
A
Upper Back
7
Q
Location of Latissimus Dorsi
A
mid/lower back
