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30 Cards in this Set
- Front
- Back
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Carpal Bones |
Scaphoid Lunate Triquetrum Pisiform Hamate Capitate Trapezoid Trapezium |
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Bony landmarks of the radius |
Head of Radius Neck of Radius Radial Tuberosity Shaft of radius Lister's Tubercle Styloid process of the Radius |
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Bony landmarks of the Ulna |
Olecranon process Trochlear notch Coronoid process Radial notch of the ulna Ulnar Tuberosity Supinator crest Shaft of ulna Head of ulna Styloid process of the ulna |
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Pisiform |
Carpal bone, serves as attachment of the flexor carpi ulnaris, mostly easily found along the ulnar/palmar surface. Just distal to the flexor crease |
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Triquetrum |
Pyramid shaped, located on dorsal surface of the pisiform just distal to the styloid process of the ulna. Abduction of the wrist will make it more palpable on the ulnar surface of the wrist |
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Hamate |
Located distal to the pisiform, palpable hook on the palmar surface. Hook of hamate and pisiform are medial attachment sites for the flexor retinaculum. |
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Scaphoid |
Somewhat peanut shaped, most commonly fractured carpal bone. Located on the radial side distal to the styloid process of the radius, forms the floor of the "anatomical snuffbox" |
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Trapezium |
Distal to the scaphoid, articulates with the base of the 1st carpometacarpal joint. Is the source of the thumb's unique movements. |
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Scaphoid & Trapezium tubercles |
Serve as lateral attachments for the flexor retinaculum, pisiform and hook of hamate medial attachment. Located on palmar surface near the flexor crease. |
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Lunate |
Most frequently dislocated carpal bone. Located distal and medial to lister's tubercle |
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Capitate |
Largest carpal, located distal to lunate. |
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Brachialis |
Action- flex the elbow (humeroulnar joint) Origin- distal half of the anterior surface of the humerus. Insertion- Tuberosity and coronoid process of ulna Nerve- musculocutaneous
Lies deep to the Biceps Brachii |
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Brachioradialis |
Action- flex the elbow (humeroulnar joint) Assists pronate and supinate the forearm when these movements are resisted Origin- lateral supra condylar ridge of humerus Insertion- styloid process of radius Nerve- radial
Forms a dividing line between the flexors and extensors; only muscle that runs length of the forearm, but does not cross the wrist joint. |
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Extensors of the wrist & hand |
-create extension primarily at the wrist and fingers. -located on posterior/lateral surface of forearm -superficial and easily palpated: extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, & extensor digitorum. |
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Extensor carpi radialis longus |
Action- extend the wrist (radiocarpal joint); abduct the wrist (radiocarpal joint); assist to flex the elbow (humeroulnar joint) Origin- lateral supracondylar ridge of the humerus Insertion- base of the 2nd metacarpal Nerve- radial |
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Extensor carpi radialis brevis |
Action- extend the wrist (radiocarpal joint), abduct the wrist (radiocarpal joint), assist to flex the elbow (humeroulnar joint) Origin- lateral supracondylar ridge of the humerus Insertion- base of the 3rd metacarpal Nerve- radial |
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Extensor carpi ulnaris |
Action- extend the wrist (radiocarpal joint), adduct the wrist (radiocarpal joint) Origin- common extensor tendon from the lateral epicondyle of humerus Insertion- base of 5th metacarpal Nerve- radial |
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Extensor digitorum |
Action- extend the 2nd through 5th fingers (metacarpophalangeal & interphalangeal joints), assist to extend the wrist (radiocarpal joint) Origin- common extensor tendon from the lateral epicondyle of humerus Insertion- middle & distal phalanges of 2nd-5th fingers Nerve- radial |
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Anconeus |
Action- extend the elbow (humeroulnar joint) Origin- lateral epicondyle of the humerus Insertion- olecranon process and lateral edge of ulnar shaft Nerve- radial |
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Extensor Indicis |
Action- extend the 2nd finger (metacarpophalangeal joint), assist to adduct the 2nd finger Origin- posterior surface of distal shaft of ulna & interosseous membrane Insertion- tendon of the extensor digitorum at the level of the 2nd metacarpal Nerve- radial |
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What nerve innervates all the extensor muscles? |
Radial Nerve |
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Flexors of the wrist and hand |
-Flexion primarily at the wrist or fingers -Located in anterior/medial surface of the forearm -Superficial layer: flexor carpi radialis, palmaris longus, & flexor carpi ulnaris -Middle layer: flexor digitorum superficialis -Deep layer: flexor digitorum profundus |
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Flexor Carpi Radialis |
Action- flex the wrist, abduct the wrist, flex the elbow Origin- common flexor tendon from medial epicondyle of the humerus Insertion- bases of 2nd & 3rd metacarpals Nerve- median |
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Palmaris Longus |
Action- tense the palmar fascia, flex the wrist,flex the elbow Origin- common flexor tendon from medial epicondyle Insertion- flexor retinaculum & palmar aponeurosis Nerve- median |
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Flexor Carpi Ulnaris |
Action- flex the wrist, adduct the wrist, assist to flex the elbow Origin- humeral head: common flexor tendon from medial epicondyle of humerus Ulnar head: posterior surface of the proximal half of ulnar shaft Insertion- pisiform Nerve- ulnar |
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Flexor digitorum superficialis |
Action- flex the 2nd-5th fingers (metacarpophangeal & proximal & distal interphalangeal joints) Origin- common flexor tendon of medial epicondyle, ulnar collateral ligament, coronoid process of ulna, interosseous membrane & proximal shaft of radius Insertion- sides of middle phalanges of 2nd-5th fingers Nerve- median |
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Flexor digitorum profundus |
Action- flex 2nd-5th fingers, assist in wrist flexion Origin- anterior & medial surfaces of proximal 3/4 of ulna Insertion- bases of distal phalanges, palmar surface of 2nd-5th digits Nerve- 1st & 2nd - ulnar; 3rd & 4th - median. Main innervation is MEDIAN |
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Pronator Teres |
Action- pronate the forearm, assist to flex the elbow Origin- medial epicondyle of the humerus, common flexor tendon, & coronoid process of ulna Insertion- middle of lateral surface of the radius Nerve- median |
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Pronator Quadratus |
Action- pronate the forearm Origin- medial, anterior surface of distal ulna Insertion- lateral, anterior surface of distal radius Nerve- median |
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Supinator |
Action- supinates the forearm Origin- lateral epicondyle of humerus, radial collateral ligament, annulnar ligament, & crest of the ulna Insertion- lateral surface of the proximal shaft of the radius Nerve- radial |
