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THORAX THORAX

Thoracic superficial

Thoracic - superficial

Pectoralis major

sternum and clavicle/greater tubercle of humerus

adducts arm 

Back muscles• Trapeziusoccipital + vertebrae/clavicle +

scapulaupper div. elevates clavicle; for climbing, elevates scapula Levator scapulaecervical vertebrae/scapulaelevates scapulaRhomboideusthoracic vertebrae/scapulaadducts and fixates scapulaLatissimus dorsivertebrae/humerusdraws arm back Quadratus lumborumiliac crest/12th rib and lumbar vertebraedraws torso R and L inferiorly

Thoracic - deep

Diaphragmribs + lumbar vert./central tendon

inhalation, increases volume of the thoracic cavity

External intercostals adjacent ribs elevates rib cage

in inhalation

Internal intercostals adjacent ribs depresses rib

cage

Pectoralis minor

ribs #3-5 /coracoid of scapula

moves scapula anteriorly, elevates rib cage

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