Wrist Joint Definitions and Terms | Biology Study Set
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33 Terms
What is one of the most complex joints of the body?
wrist joint
What is the wrist joint?
radiocarpal joint
What is the midcarpal (intercarpal) joint?
articulation between the two parallel rows of carpal bones
What is the carpometacarpal joint (CMC)?
articulation between carpals and metacarpals
What is between the ulna and the carpals?
articular disk
What type of joint is the radiocarpal joint?
synovial biaxial joint
How many degrees of freedom is the radiocarpal joint?
2
What motions does the radiocarpal joint do?
flexion/extension and radial/ulnar deviation
Where is the scaphoid (picture)?
Where is the lunate (picture)?
Where is the triquetrum (picture)?
Where is the pisiform (picture)?
Where is the trapezium (picture)?
Where is the trapezoid (picture)?
Where is the capitate (picture)?
Where is the hamate (picture)?
What does the radial collateral ligament do?
provide support for the wrist
What does the ulnar collateral ligament do?
provide support for the wrist
What does the palmar radiocarpal ligament?
limits wrist extension
What does the dorsal radiocarpal ligament?
limits wrist flexion
What does the articular disk do?
act as shock absorber and fills the gap
What does the palmar fascia (aponeurosis) do?
-covers tendons of extrinsic muscles
-provides some protection to palm
-provides site of attachment for palmaris longus
What is normal ROM for wrist flexion?
80 degrees
What is normal ROM for wrist extension?
70 degrees
What is normal ROM for ulnar deviation?
30 degrees
What is normal ROM for radial deviation?
20 degrees
What is a colles fracture?
fracture of the distal end of the radius
OIAN of flexor carpi ulnaris?
O: Medial epicondyle of the humerus
I: Pisiform and base of the 5 metacarpal
A: Wrist flexion, ulnar deviation
N: Ulnar nerve
OIAN of flexor carpi radialis?
O: medial epicondyle of humerus
I: base of 2 & 3 metacarpal
A: wrist flexion, radial deviation
N: median nerve
OIAN of palmaris longus?
O: Medial epicondyle of humerus
I: palmar aponeuroses (fascia)
A: wrist flexion
N: Median nerve
OIAN of extensor carpi radialis longus?
O: lateral supracondylar ridge of humerus
I: base of 2nd metacarpal
A: wrist extension, radial deviation
N: radial nerve
OIAN of extensor carpi radialis brevis?
O: lateral epicondyle of humerus
I: base of 3rd metacarpal
A: wrist extension
N: radial nerve
OIAN of extensor carpi ulnaris?
O: lateral epicondyle of humerus
I: base of 5th metacarpal
A: wrist extension, ulnar deviation
N: radial nerve
