Chapter 12 - upper extremity MS

• Subclavius

  depresses clavicle,

  elevates 1st rib
• Pectoralis minor

  protracts & depresses scaupla
• Serratus anterior

  Protraction of scapula (abduction & upward rotation of scapula)
• Trapezius

  superior fibers: elevates scapula; extend cervical spine

  middle fibers: adduct scapula

  inferior fibers: depresses scapula
• Levator scapulae

  Elevates scapula
• Rhomboideus minor

  retracts & elevates scapula 
• Rhomboideus major

  Adducts & elevates scapula 
• Deltoid – anterior head

  flexes & medially rotates arm
• Deltoid –lateral head

   abducts arm
• Deltoid – posterior head

  extends & laterally rotates arm
• Coracobrachialis

  adducts & flexes arm
• Pectoralis major m.

  flexes, adducts & medially rotates arm
• Latissimus dorsi

  Extends, adducts & medially rotates arm
• Teres major

  Extends, adducts & medially rotates arm
• Supraspinatus

  abducts arm
• Infraspinatus

  laterally rotates arm
• Teres minor

  laterally rotates & adducts arm
• Subscapularis

  medially rotates arm
• Biceps brachii

  Flexes arm & elbow, supinates elbow to neutral
• Brachialis

  flexes forearm
• Biceps brachii – long head

  Flexes & adducts arm, supinates elbow to neutral
• Biceps brachii – short head

  flexes arm & forearm, supinates forearm/elbow to neutral
• Brachioradialis

  flexes forearm
• Triceps brachii

  long head: extends arm

  all heads: extend forearm
• Triceps brachii – long head

  extends & adducts arm & extends forearm
• Triceps brachii – lateral head

  extends forearm
• Triceps brachii – medial head

  extends forearm