the forearm and hand Flashcards
(51 cards)
how is the radioulnar joint arranged?
into 3 distinct joint
what type of joint is the proximal radioulnar joint?
what articulates? what type of movement does it allow?
what are its reinforcing structures?
-synovial joint
-head od radius with radial notch of ulna
-pivot (rotation)
annular ligament holds the head of the radius to the ulna
what type of joint is the middle radioulnar joint? what articulates? what type of movement does it allow?
what are its reinforcing structures?
- solid, syndesmosis joint
- -shaft of radius and ulna
- no movement
- interosseus membrane which connects the ulna and radius together
what type of joint is the distal radioulnar joint? what articulates? what type of movement does it allow?
what are its reinforcing structures?
- synovial joint
- head of ulna and ulnar notch of radius
- pivot (rotation)
- ventrl and dorsal radioulnar ligament
how can supination be described?
bones of the radius and ulna are parallel to each other
how can pronation be described?
radius will cross over the top of the ulna
how many carpal bones do we have in our hands?
where are they located?
- 8
- the carpal bones formes the base of the hand, closest to the wrist
what are the Carpal bones Name?
Scaphoid Lunate Triquetrum Pisiform Hamate Capitate Trapezoid Trapezium
what trick can be used to recall the carpal bones? in what direction does it go?
some lovers try positions that they can’t handle
goes fro lateral to medial for both rows
also can use venturas trick: so long to pinky here comes the thumb
what is a main source of wrist injuries?
often occur due to the scaphoid fracture which occurs due to tripping hands flat to the ground
how many metacarpals are there in the hand?
5
how is the morphology of phalanges and metacarpal bones?
they are divided into 3 subsections, head, body and base
how many phalanges can be found on the thumb? on the other fingers?
thumb 2: distal and proximal
others = 3: distal, middle and proximal
what type of joint is the intercarpal joints?
what do they articulate with?
what movement is permitted?
- synovial
- articulate between the carpal bones
- plane and gliding
what is another name given to the wrist joint?
radiocarpal joint
what type of joint is the radiocarpal joints?
what do they articulate with?
- synovial, ellipsoid
- articulations between distal radius, triangular fibrocartilage disc and the proximal row (row closest to wrist) of carpals except Pisiform
what movement can be accomplished by the radiocarpal joint?
flexion/extension
abduction (radial deviation)/ adduction (ulnar deviation)
what ligaments reinforce the joints of the wrist and what movement do they limit?
- radial collateral ligament prevents adduction (U.D)
- Ulnar collateral ligament prevents abduction (R.D)
where about in the hand is the metacarpophalangeal ( MCP) joint found
between the metacarpals and the proximal phalanges
what type of joint is MCP?
what movement can be executed?
synovial, ellipsoid joint
flexion/extension
abduction/adduction
where in the hand is the carpometracarpal (CMC) joint I found?
between the 1st metacarpal and trapezium
what type of joint is CMCI?
what movement can be executed?
synovial, saddle joint
flexion/extension
abduction/adduction
opposition (movement specific to humans)
where in the hand is the carpometracarpal (CMC) joint II-V found?
between the distal row (closer to fingers) of carpal bones and the metacarpals II-V
what type of joint is CMCII-V?
what movement can be executed?
synovial ellipsoid joint
very limited movement, however, CMC IV and V facilitate opposition to thumb
