UL Muscles Flashcards
Pectoralis major Innervation and action
Lateral and medial pectoral.
Adduction and internal rotation and assist arm flexion
Serratus anterior, innovation and three actions
Long thoracic.
Protract scapula and depresse shoulder and assist upward rotation
Trapezius, Innovation and three actions
Spinal accessory , Retract and adduct scapula, upward rotation of scapula, side Bend neck ipsilateral
Rhomboid major and minor, Innovation and two main actions
Dorsal scapular, retract and fix medial border of scapula
Latissimus dorsi innervation and 3 action
Thoracodorsal, extend adduct and internally rotate arm
Deltoid innervation and 5 actions
Axillary nerve, Flex abduct extend and rotate arm both directions
Three muscles of the rotator cuff
Supraspinatus
infraspinatus
subscapularis
Biceps brachii, Innovation and action and two actions
Musculocutaneous, Flex forearm and assist arm flexion
Brachialis innervation and action
Flex forearm
Coracobrachialis innervation and two actions
Musculocutaneous, Flex and adduct arm
Triceps brachii innervation
Radial
While nerve enervates all forearm flexors except one 1/2? Which ones are exempt?
Median.
Flexor Carpi ulnaris & flexor dig. profundus
Flexor carpi radialis innervation?
Action?
Median;
- Flex wrist
- radial deviation
- assist pronation
Flexor carpi ulnaris innervation?
Action?
Ulnar.
- flex wrist
- ulnar deviation of hand
Flexor digitorum superficialis…action
flex middle phalanges 2-5
flexion at wrist
Flexor dig. profundus…action
flexion at distal IP joints @ assist wrist flexion
Flexor pollicis longus…action
flex thumb @ IP joint distally
What nerve innervates all extensors?
radial
Brachioradialis….action
flex @ elbow
assist pronation and supination from extremes
Extensor carpi radialis longus & brevis….action
extension wrist & radial deviation
extensor digitorum….action
extend MCP & IP joints; wrist extension
extensor carpi ulnaris….action
extend & ulnar deviation
Supinator….action
supinates
abductor pollicis longus…..action
Abd thumb, radially deviate and flex hand
Extensor pollicis brevis & longus….action
Extend joints of thumb & assist radial deviation
