Muscles- origin, insertion and action

• Coracobrachialis


  origin= coracoid process of scapula

  insertion= shaft of humorous

  action= flexion and adduction
• short head biceps brachii

  origin= coracoid process

  insertion= radial tuberosity

  action= flexion at elbow, shoulder and supernation
• long head of biceps brachii

  origin= supraglenoid tubercular sulcus

  insertion= tuberosity of radias

  action= flexion at elbow
• Brachialis


  origin= humorous

  insertion= tuberosity of ulna

  actions= flexion at elbow
• What are the 4 anterior musecles?

  coracobrachialis, short and long head of biceps brachii and brachialis
• What are the 2 posterior muscles?

  anconeus

  lateral and long head of triceps
• Anconeus


  origin= epicondyl of humorous

  insertion= olecranon and posterior ulna

  action= extends forearm
• Lateral, Medial and long head of triceps

  Origin= infraglenoid tubercle of scapula

  insertion= olecranon and posterior ulna

  action= extends forearm
• What is in rotator cuff?

  Teres minor

  Infraspinatus

  Supraspinous

  Subscapularis
• Teres minor


  origin= scapula

  insertion= greater tubercle

  action= adduction and flexion
• Infraspinatus


  origin= posterior infraspinatus process on scapula

  insertion= greater tubercle

  action= lateral rotation
• Supraspinatus


  origin= supraspinous fossa process of scapula

  insertion= greater tubercle

  action= abduction
• Subscapularis


  orign= subscapularis fossa of scapula

  insertion= lesser tubercle

  action= rotation
• What are the 5 prime mover muscles?

  pectoralis major, latissimus dorsi, deltoid, teres major, serratus anterior
• Pectoralis major


  origin= clavicle sternum and ribs 1-6

  insertion= crest of greater tubercle

  action= adduction and flexion
• latissimus dorsi


  origin= 7-12 thoracic, lower 3 ribs

  insertion= floor of intertubercular groove

  action= adduction and flexion
• deltoid


  origin= clavicle, acromion, spine

  insertion= deltoid tuberosity of humorous

  action= adduction, flexion and extension
• teres major


  origin= inferior border of scapula

  insertion= intertubercular groove

  action= medial rotation, adduction and extension
• serratus anterior


  origin= 1-8 ribs

  insertion= scapula

  action= pull away from spine