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26 Cards in this Set
- Front
- Back
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What are the primary functions of the forearm? |
Provides extension/flexion of hands and digits Provides for pronation-supination Provides better hand positioning Provides better hand eye coordination |
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Radius and Ulna during rotation |
They act as complementary blocks Distal radius swings over anteriorly over the distal ulna while proximal radial head rotates |
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Distal Ulna Anatomy |
Typical Long bone = 3 borders and surfaces Posterior surface is subcutaneous marking boundary between compartments |
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Distal Radial Anatomy |
Typical long bone - 3 borders and surfaces Posterior distal dorsal tubercle for tendon or extensor pollicis longus |
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What bones are inside the hand? |
8 carpal bones 5 metacarpal bones 14 phalangeal bones |
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What are the Carpal bones |
Scaphoid, lunate, triquetral, pisiform, trapezium, capitate, hamate |
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What are the Phalangeal bones? |
Thumb to Pinkie (1-5) Proximal, middle, distal phalanx |
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Where do most arm tendons attach at the hand? |
Most long distal tendons attach to the hand at the phalangeals, some to carpal and metacarpals Provides agility without the bulk |
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What makes the boundary between flexor and extensor compartments? |
Ulnar posterior surface and intermuscular septum from latreal radius to deep fascia |
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What is the interosseous membrane |
Space between ulna and radius |
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What nerve are the flexors in the forearm supplied by? |
Median nerve except for Flexor carpi ulnaris and medial half of flexor digitum profundus |
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What movement do thee forearm flexors preform |
Movement of wrist and flexion of fingers Pronation |
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What are the superficial Flexors? |
Pronator Teres Flexor Carpi Radialis Palmaris Longus Flexor Carpi Ulnaris |
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What never supplies the Flexor Carpi Ulnaris? |
Ulnar nerve |
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What are the intermediate Flexors |
Flexor digitorum Superficialis |
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What are the deep flexors? |
Flexor pollicis longus Flexor digitorum Profundus Pronator Quadratus |
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What never supplies the Pronator quadratus |
Medial half supplied by the ulnar nerve - 4th and 5th finger |
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When you make a fist what muscles are engaged? |
Both flexors and extensors |
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Pronator Teres Attachments and Nerve |
O: Coronoid process of ulna and medial epicondyle of Humerus I: Middle of convexity of lateral surface of radius N: Median Nerve |
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Flexor Carpi Radialis |
O: Medial Epicondyle of Humerus I: Base of 2nd metacarpal N: Median Nerve |
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Palmaris Longus |
O: Medial Epicondyle of Humerus I: Distal Half of Flexor retinaculum and palmar eponeurosis N: Median |
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Flexor Carpi Ulnaris |
O: Olecranon and posterior border of Ulna I: Pisiform, hook of hamate, 5th metacarpal N: Ulnar Nerve |
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Flexor Digitorum Superficialis |
O: Medial epicondyle of humerus and coronoid process of ulna. and oblique line of radius I: Shafts of middle phalangess of medial four digits N: Median Nerve |
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Flexor Digitorum Profundus |
O: Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane I: Bases of distal phalanges 2-5 N: Lateral - Median Nerve // Median - Ulnar Nerve |
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Flexor Policis Longus |
O: Anterior surface of radius and adjacent interosseous membrane I: Base of distal phalanx of thumb N: Median Nerve - Anterior Interosseous nerve |
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Prontator Quadratus |
O: Distal quarter of anterior surface of ulna I: Distal quarter of anterior surface of radius N: Median Nerve - Anterior Interosseous nerve |
