Final Lab Exam Flashcards
Upper traps - origin, insertion, and action
O - occipital protuberance and upper vertebrae
I - lateral third of clavicle, acromion process
A - scapular elevation, upward rotation, retraction
Middle traps - origin, insertion, and action
O - Spinous processes of C7-T3
I - medial aspect of acromion and spine of scapula
A - Scapular retraction, minimal upward rotation
Low traps - origin, insertion, and action
O - Spinous process of T4-T12
I - base of spine of the scapula
A - Scapular depression, upward rotation, retraction
Sternocleidomastoid - origin, insertion, and action
O - sternum and clavicle
I - mastoid process
A - head neck and flexion, lateral neck flexion, rotation of head to opposite side
Rhomboid muscles - origin, insertion, and action
O - Spinous processes of C7-T5
I - Vertebral border of scapula
A - Scapular retraction, elevation, and downward rotation
Deltoid - origin, insertion, and action
O - Anterior is lateral third of clavicle, middle is acromion process, posterior is spine of scapula
I - Deltoid tuberosity
A - Shoulder abduction (palm down, raising arm up)
Latissimus Dorsi - origin, insertion, and action
O - spinous processes of T7-L5
I - floor of bicipital groove
A - shoulder extension, adduction, medial rotation
Biceps - origin, insertion, and action
O- long head - supraglenoid tubercle of scapula
Short head - coracoid process of scapula
I- radial tuberosity of radius
A- shoulder flexion, elbow flexion, and forearm supination
Pectoralis Major Clavicular Portion - origin, insertion, and action
O - Medial third of clavicle
I - Lateral lip of bicipital groove of humerus
A - shoulder flexion and horizontal adduction
Pectoralis Major Sternal Portion - origin, insertion, and action
O - Sternum, costal cartilage of first 6 ribs
I - Lateral lip of bicipital groove of humerus
A - medial rotation, adduction, horizontal adduction
Triceps - origin, insertion, and action
O- Long head: infraglenoid tubercle of scapula
Lateral head: inferior to greater tubercle on posterior humerus
Medial head: posterior surface of humerus
I- Olecranon process of ulna
A- shoulder and elbow extension
Flexor carpi radialis - origin, insertion, and action
O- medial epicondyle of the humerus
I- base of second and third metacarpals
A- combined wrist flexion and radial deviation
Extensor (carpi) ulnaris - origin, insertion, and action
O- lateral epicondyle of humerus
I- base of fifth metacarpal
A- combined wrist extension and ulnar deviation
Extensor pollicis longus - origin, insertion, and action
O- posterior middle portions of ulna and interosseus membrane
I- base of distal phalanx of thumb
A- extends the CMC, MCP, and IP joints of the thumb
Flexor digitorum superficialis - origin, insertion, and action
O- common flexor tendon on the medial epicondyle, coronoid process, and radius
I- sides of the middle phalanx of the 4 fingers
A- PIP and MCP joint flexion, wrist flexion
