Muscles of Trunk and Back Flashcards
linea alba
connective tissue covering trunk muscles
External abdominal oblique
O- Ribs 5 - 7
I- linea alba
A- laterally rotates trunk
Internal abdominal oblique
A- latterally rotates trunk
Transverse abdominis
compresses abdominal wall
Serratus anterior
O- ribs 1-8
I- inferior angle of scapula
A- abducts scapula
External intercostals
O- inferior border of rib
I- superior border of rib below
A- elevates ribs
Internal intercostals
O- superior margin of rib
I- inferior border of rib above
A- depress ribs
Diapragm
O- lower ribs
I- central tendon
A- inspiration (contraction) expiration (relaxation)
Erector Spinae
extend & rotate vertebral column
Quadratus lumborum
extend vertebral column
Rhomboideus Major
O- spines of t2-t5
I- vertebral border of scapula
A- adducts scapula
Rhomboideus Minor
adduct scapula
