Ch 7 Hand & Wrist Flashcards
Memorize hand bones (names of carpals, metacarpals, phalanges, and the joints between them)
The wrist and hand contain how many bones
29
Breakdown the 29 bones in hand and wrist
8 carpals in 2 rows, 5 metacarpals, 14 phalanges
What are the 8 carpal names in order? (Proximal first, then distal)
Scaphoid
Lunate
Triquetrum
Pisiform
Trapezium
Trapezoid
Capitate
Hamate
Wrist is what kind of joint? What are the movements?
Condyloid joint ;; flexion, extension, abduction and adduction
What are the 3 finger joints?
Metacarpalphalangeal (condyloid joint)
Proximal interphalangeal (ginglymus joint)
Distal interphalangeal (gingylmus joint)
What are the 2 thumb joints?
Metacarpalphalangeal (gingylmus joint)
Interphalangeal (gingylmus joint)
There are ___ muscles that move the wrist but do not cross the hand, and ___ muscles that primarily move phalanges but also involve wrist action
6 ;
9
What are the anteromedial muscles?
Flexor carpi radialis
Flexor carpi ulnaris
Palmaris longus
Flexor digitorum superficial is
Flexor digitorum profundus
Flexor pollicis longus
What are the posterolateral muscles?
Extensor carpi radialis longus
Extensor carpi radialis breves
Extensor carpi ulnaris
Extensor digitorum
Extensor indicis
Extensor digiti minimi
Extensor pollicis longus
Extensor pollicis brevis
Abductor pollicis longus
What is the origin of flexor carpi radialis? (Same as palmaris longus and flexor carpi ulnaris)
What is the insertion?
Medial epicondyle of humerus ;
Second and third metacarpal base (anterior/palmar)
Actions of flexor carpi radialis?
Wrist flexion and abduction, elbow flexion
What is the origin of palmaris longus? (Same as flexor carpi radialis and flexor carpi ulnaris)
What is the insertion?
Medial epicondyle of humerus ;
Palmaris aponeuros of 2-5 metacarpals
What are the actions of palmaris longus?
Wrist flexion ; elbow flexion
What are the origins of flexor carpi ulnaris? (1 of them is the same as flexor carpi radialis and palmaris longus)
What are the insertions? (Hint, carpals 4 & 8, and a metacarpal)
Medial epocondyle of humerus, &
Posterior proximal aspect of ulna
Pisiform, Hamate, and 5th metacarpal
What are the actions of flexor carpi ulnaris?
Wrist flexion & wrist adduction
What are the origins of extensor carpi ulnaris? (1 is the same as extensor carpi radialis brevis)
What is the insertion?
Lateral epicondyle of humerus, &
Middle of the posterior border of ulna
Base of 5th metacarpal
What are the actions of extensor carpi ulnaris?
Wrist extension, wrist adduction (and elbow extensions?)
What is the origin of extensor carpi radialis brevis? (Same as extensor carpi ulnaris)
What is the insertion?
Lateral epicondyle of humerus ;
3rd metacarpal
What are the actions of extensor carpi radialis brevis?
Wrist extension & wrist abduction, elbow extension
What are the origins of extensor carpi radialis longus? (One is shared with the other extensors)
What is the insertion?
Lateral epicondyle of humerus &
Lower 1/3 of lateral supracondylar ride of humerus
Base of second metacarpal
what are the actions of extensor carpi radialis longus?
Wrist extension, wrist abduction, elbow extension
what are the actions of extensor carpi radialis longus?
Wrist extension, wrist abduction, elbow extension
What is the origin of extensor digitorum?
What is the insertion?
Lateral epicondyle of humerus ;
Four tendons of middle and distal phalanges of the four fingers
