Insertion: lateral third of clavicle, acromion, and spine of scapulartery
Acton: steadies,raise,descends,retract e and rotates the scapula.
Trapezius
Latissimus dorsi
Action: Flexes, adducts and rotates the arm medially
; elevates ribs 1-6,aidding in forced inspiration.
Pectoralis major
Pectoralis minor 胸小肌
Actions: Stabilizes scapula by drawing it forward and downward
3) The Deep Cervical Muscles 颈深肌
lateral group
scalenus anterior scalenus medius scalenus posterior
Actions: elevate the ribs and flex and rotate the cervical region of the vertebral column to the opposite side.
sternal parts.
aortic hiatus主动脉裂孔
(T12, abdominal aorta主动脉,
thoracic duct 胸导管)
esophageal hiatus食管裂孔
(T10, esophagus食管, vagal trunks 迷走神经)
vena caval foramen腔静脉孔