Lab 5: Pectoral Area and Ventral Upper Limb Flashcards
Pectoralis major
Action: Adducts, flexes, and medially rotates arm
Origin: Clavicle, sternum and ribs
Insertion: Humerus (Intertubercular sulcus)
Latissimus dorsi
Action: Adducts, extends and medially rotates arm
Origin: Scapula, vertebral column, and iliac crest
Insertion: Humerus (intertubercular sulcus)
Deltoid
Action: Abducts, flexes and rotates arm medially and laterally
Origin: Clavicle and scapula
Insertion: Deltoid tuberosity of humerus
Trapezius
Action: Adducts and rotates scapula; elevation and depression of scapula
Origin: Superior nuchal line of Occipital bone and vertebral column
Insertion: Lateral clavicle and scapular spine and acromion
Levator scapulae
Action: Elevation of scapula, lateral neck flexion
Origin: Transverse processes of cervical vertebrae (C1-C4)
Insertion: Medial border (scapula)
Pectoralis minor
Action: Stabilizes, abducts and rotates scapula
Origin: Ribs 3-5
Insertion: Scapula (coracoid process)
Subscapularis
Action: Medial rotation of arm, stabilizes humerus head in glenoid cavity
Origin: Subscapular fossa of scapula
Insertion: Lesser tubercle of humerus
Infraspinatus
Action: Lateral rotation of arm, stabilizes humerus head in glenoid cavity
Origin: Infraspinous fossa of scapula
Insertion: Greater tubercle of humerus
Supraspinatus
Action: Abduction of arm, stabilizes humerus head in glenoid cavity
Origin: Supraspinous fossa of scapula
Insertion: Grater tubercle of humerus
Teres minor
Action: Lateral rotation and adduction of arm, stabilizes humerus head in glenoid cavity
Origin: Lateral border of scapula
Insertion: Greater tubercle of humerus
Teres major
Action: Medial rotation, adduction and extension of arm
Origin: Inferior angle and lateral border of scapula
Insertion: Intertubercular sulcus of humerus
Coracobrachialis
Action: Flexion and adduction of arm
Origin: Coracoid process of scapula
Insertion: Mid-shaft of humerus
Biceps brachii (long and short head)
Action: supination and flexion of forearm
Origin: supraglenoid tubercle and coracoid process of scapula
Insertion: radial tuberosity
Brachialis
Action: Flexion of forearm
Origin: Anterior distal shaft of humerus
Insertion: Ulnar tuberosity and coranoid process of ulna
Triceps brachii (long, lateral, and medial head)
Action: Extension of forearm; stabilizes shoulder joint
Origin: Infraglenoid tubercle (scapula) and proximal posterior shaft of humerus
Insertion: Olecranon process (ulna)
Brachioradialis
Action: Flexion of forearm; pronation of forearm (when supinated); supination of forearm (when pronated)
Origin: Distal shaft of humerus
Insertion: Styloid process of radius
Flexor carpi radialis
Action: Wrist flexion and hand abduction
Origin: Medial epicondyle (humerus)
Insertion: Metacarpals II and III
Palmaris longus
Action: Wrist flexion (weak)
Origin: Medial epicondyle (humerus)
Insertion: Palmar aponeurosis (sheet-like-tendon)
Flexor carpi ulnaris
Action: Wrist flexion and hand adduction
Origin: Medial epicondyle of humerus and olecranon process and posterior border (ulna)
Insertion: Pisiform and hamate (carpal bones)
Pronator teres
Action: Forearm pronation
Origin: Medial epicondyle (humerus) and coronoid process of ulna
Insertion: Lateral mid-shaft of radius
Flexor pollicis longus
Action: Flexion of thumb
Origin: Mid-shaft of radius; coronoid process (ulna)
Insertion: Distal phalanx of I (thumb)
Flexor digitorum profundus
Action: Flexion of wrist and finger (2-5)
Origin: proximal shaft of ulna
Insertion: distal phalanges II-V
Supinator
Action: Supination of forearm
Origin: Ulna (posterior proximal shaft); lateral epicondyle of humerus
Insertion: Radius (lateral proximal shaft)
Extensor carpi radialis longus
Action: extension of wrist and abduction of hand
Origin: supracondylar ridge (humerus)
Insertion: Metacarpal II
