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Anatomy (Fach) / Anatomy III (Lektion)

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• Movements of the trunk 1. Flexion/Extension 2. Lateral Flexion 3. Rotation 
• Muscles of the anterior and lateral abdominal wall + role - 2 rectus abdominis muscles (either side of the midline) - External/Internal/Transversus abdominis (anterolateral) - linea alba (connective tissue) --> attachment  --> moving the trunk, pressure in the abdominal cavity 
• Muscles of the back + role - erector spinae (along each side of the spinous processesof the vertebrae) --> 3 discrete groups --> extension of spine, erect posture
• Movements at the scapulothoracic and glenohumeral joint 1. Scapulothoracic joint movements scapula: - Protraction/retraction - Elevation/depression - Rotation  2. Glenohumeral joint: - multi-axial
• Muscles acting upon the glenohumeral joint 1. Deltoid (thick triangular) - prox. attachment to the clavicle (acromion process + spine) - dist. attachment to shaft of humerus  --> abduction, flexion, extension 2. Pectoralis major - prox. attachment to clavicle, manubrium and body of sternum - dist. attachment to humerus + lip of intertubercular (bicipital) groove

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