arm and hand muscles Flashcards
Name the muscle and action it performs
Abductor Digiti Minimi
Action: Abduct the 5th finger (metacarpophalangeal joint)
Name the muscle and action it performs
Abductor Pollicis Brevis
Actions: Abduct the thumb (carpometacarpal and metacarpophalangeal joints)
Assist in opposition of the thumb (carpometacarpal joint)
Name the muscle and its actions
Abductor Pollicis Longus
Actions:
Abduct the thumb (carpometacarpal joint)
Extend the thumb (carpometacarpal joint)
Abduct the wrist (radiocarpal joint)
Name the muscle and its actions
Adductor Pollicis
Actions:
Adduct the thumb (carpometacarpal and metacarpophalangeal joints)
Assist to flex the thumb (metacarpophalangeal joint)
Name the muscle and its actions
Anconeus
Action:
Extend the elbow (humeroulnar joint)
Name the muscle and its origin
Anconeus
Origin: Lateral epicondyle of the humerus
Name the muscle and its actions
Brachialis
Action:
Flex the elbow (humeroulnar joint)
Name the muscle and its origin
Brachialis
Origin: Distal half of anterior surface of humerus
Name the muscle and its actions
Brachioradialis
Actions:
Flex the elbow (humeroulnar joint)
Assist to pronate and supinate the forearm when movements are resisted (humeroradial joints)
Name the muscle and its origin
Brachioradialis
Origin: Proximal 2/3rds of the lateral supracondylar ridge of humerus
Name the muscle and its actions
Dorsal Interossei
Actions:
DAB (Dorsal AB)
Abduct the 2nd 3rd and 4th fingers at the metacarpophalangeal joints
Assist to flex 2nd 3rd and 4th fingers at metacarpophalangeal joints
Assist to extend 2nd 3rd and 4th fingers at interphalangeal joints
Name the muscle and its actions
Extensor carpi radialis brevis
Actions:
Extend the wrist (radiocarpal joint)
Abduct the wrist (radiocarpal joint)
Assist to flex the elbow (humeroulnar joint)
Name the muscle and its origin
Extensor carpi radialis brevis
Origin: Common extensor tendon from the lateral epicondyle of humerus
Name the muscle and its actions
Extensor carpi radialis longus
Actions:
Extend the wrist (radiocarpal joint)
Abduct the wrist (radiocarpal joint)
Assist to flex the elbow (humeroulnar joint)
Name the muscle and its origin
Extensor carpi radialis longus
Origin: Distal 1/3rd of the lateral supracondylar ridge of humerus
Name the muscle and its actions
Extensor carpi ulnaris
Actions:
Extend the wrist (radiocarpal joint)
Adduct the wrist (radiocarpal joint)
Name the muscle and its origin
Extensor Carpi Ulnaris
Origin: Common extensor tendon from the lateral epicondyle of humerus
Name the muscle and its action
Extensor Digitorum
Actions:
Extend the 2nd through 5th fingers
(metacarpophalaneal and interphalangeal joints)
Assist to extend the wrist (radiocarpal joint)
Name the muscle and its origin
Extensor Digitorum
Origin: Common extensor tendon from the lateral epicondyle of humerus
Name the muscle and its actions
Extensor pollicis brevis
Actions:
Extend the thumb (metacarpophalangeal and carpometacarpal joints)
Abduct the wrist (radiocarpal joint)
Name the muscle and its actions
Extensor pollicis longus
Actions:
Extend the thumb (interphalangeal, metacarpophalangeal, carpometacarpal joints)
Abduct the wrist (radiocarpal joint)
Name the muscle and its actions
Flexor carpi radialis
actions:
Flex the wrist (radiocarpal joint)
Abduct the wrist (radiocarpal joint)
May assist to flex elbow (humeroulnar joint)
Name the muscle and its origin
Flexor carpi radialis
Origin: Common flexor tendon from medial epicondyle of humerus
Name the muscle and its actions
Flexor carpi ulnaris
Actions:
Flex the wrist (radiocarpal joint)
Adduct the wrist (radiocarpal joint)
Assist to flex the elbow (humeroulnar joint)
Name the muscle and its origin
Flexor carpi ulnaris
Origin:
Humeral head: common flexor tendon from the medial epicondyle of humerus
Ulnar head: posterior surface of proximal 2/3rds of ulna
Name the muscle and its actions
Flexor digitiminimi brevis
actions:
Flex the 5th finger (metacarpophalangeal joints)
Assist in opposition of the 5th finger toward the thumb
Name the muscle and its actions
Flexor digitorum profundus
Actions:
Flex the 2nd through 5th fingers (metacarpophalangeal and distal interphalangeal joints)
Assist to flex the wrist (radiocarpal)
Name the muscle and its origin
Flexor Digitorum Profundus
Origin: Anterior and medial surfaces of proximal 3 quarters of ulna
Name the muscle and its actions
Flexor digitorum superficialis
Actions:
Flex the 2nd through 5th fingers (metacarpophalangeal and proximal interphalangeal joints)
Flex the wrist (radiocarpal joint)
Name the muscle and its origin
Flexor digitorum superficialis
Origin: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of the ulna, interosseous membrane and proximal shaft of radius
Name the muscle and its actions
Flexor Pollicis Brevis
Actions:
Flex the thumb (carpometacarpal and metacarpophalangeal joints)
Assist in opposition of the thumb
Name the muscle and its actions
Flexor Pollicis Longus
Actions:
Flex the thumb (interphalangeal joint)
Flex the thumb (metacarpophalangeal and carpometacarpal joints)
Assist to flex the wrist (radiocarpal joint)
Name the muscle and its actions
Lumbricals
Actions:
Extend 2nd through 5th fingers at the interphalangeal joints
Flex the 2nd through 5th fingers at the metacarpopahalangeal joints
Name the muscle and its actions
Opponens Digiti Minimi
Actions:
Opposition of the 5th finger at the carpometacarpal joint
Name the muscle and its actions
Opponens Pollicis
actions:
Oppostion of the thumb at the carpometacarpal joint (bringing the pads of the thumb and 5th finger together)
Name the muscle and its actions
Palmar Interossei
Actions:
PAD: Palmar ADduct
Adduct the thumb, 2nd, 4th, and 5th fingers toward the 3rd finger
Assist to flex the thumb, 2nd, 4th, and 5th, at the metacarpophalangeal joints
Assist to extend the thumb, 2nd, 4th, and 5th fingers at the interphalangeal joints
Name the muscle and its actions
Palmaris Longus
Actions:
Tense the palmar fascia
Flex the wrist (radiocarpal joint)
May assist to flex the elbow (humeroulnar joint)
Name the muscle and its origin
Palmaris Longus
Origin:
common flexor tendon from the medial epicondyle of humerus
Name the muscle and its actions
Pronator Quadratus
Actions:
pronate the forearm (radioulnar joints)
Name the muscle and its origin
Pronator Quadratus
Origin:
Medial, anterior surface of distal ulna
Name the muscle and its actions
Pronator Teres
Actions:
pronate the forearm (radioulnar joints)
Assist to flex the elbow (humeroulnar joint)
Name the muscle and its origin
Pronator Teres
Origins:
Common Flexor tendon from medial epicondyle of humerus and coronoid process of the ulna
Name the muscle and its actions
Supinator
Action: Supinate the forearm (radioulnar joints)
Name the muscle and its origin
Supinator
Origin:
Lateral epicondyle of humerus, radio collateral ligament, annular ligament and supinator crest of the ulna
