Tuesdays lecture Flashcards
what type of joint is the distal radioulnar joint (DRUJ)
Pivot type of synoival joint
what is the distal radioulnar joint?
- round head of the ulna articulates with the ulnar notch of medial side of distal radius
- TFCC binds the ends of the radius and ulna together
- functions to help transmit loads from the hand to the forearm
muscles that attach to the lateral epicondyle
extensor carpi ulnaris extensor digiti minimi extensor digitorium extensor carpi brevis supinator
posterior compartment of the forearm
- all innervated by the radial nerve
- held in place by the extensor retinaculum
- 6 different dorsal compartments
muscles thats attach to the lateral supracondylar crest
extensor carpi longus
brachioradialis
In the first compartment of the posterior forearm
abductor pollicis longus
extensor pollicis brevis
2nd compartment of the posterior forearm
extensor carpi radialis longus and brevis
3rd compartment of the posterior forearm
extensor pollicis longus
4th compartment of the posterior forearm
extensor digitorum
extensor indicis
5th compartment of the posterior forearm
extensor digiti minimi
6th compartment of the forearm
extensor carpi ulnaris
Borders of the Anatomical snuffbox
lateral border:
Extensor pollicis brevis and the Abductor Pollicis Longus
Medial border:
extensor pollicis longus
floor of the anatomical snuffbox
scaphoid carpal bone
contents of the anatomical snuff box
radial artery and nerve
Lateral epicondylosis (Tennis elbow)
- effects the extensor muscles of the forearm that attach to the lateral epicondyle
- caused by repetitive motion
Wrist drop
- Radial nerve damage
- (The radial nerve innervates almost all the extensors so drops the hand)
DeQuervain’s Syndrome
- inflammation of the structures in the first dorsal compartment
- pain increase with a stretch to these structures
- the extended and abducted position for a long period of time
Where is the DeQuervain’s Syndrome more common?
-Daycare worker and new mothers
What does supracondyle fracture cause?
damage to the medial nerve and brachial artery
What is the anterior portion of the forearm?
Voler
What is the posterior portion of the forearm
Dorsum
Ulna Deviation
- larger ulna devation
- side to side wrist motion, towards the ulna
Radial Deviation
-side to side wrist motion, toward the radial
