Forearm and wrist Flashcards
radius: name 3 borders
anterior, posterior, interosseous
radius: name 3 surfaces
anterior, posterior, lateral
radius: projection on distal end called
radial styloid process
radius: 2 facets for articulation
- scaphoid bone
- lunate bone
which bone on distal end is thicker? and which projects more?
- radius thicker
- radial styloid process projects more distally
ulna: name 3 borders
anterior, posterior, interosseous
ulna: name 3 surfaces
anterior, posterior, medial
radius: ant/post. dorsal tubercle?
posterior, distal end
function of interosseous membrane
stability and facilitate movement of radius and ulna
eg. colles fracture
- dinner fork shape
- styloid process of ulna snaps off
- radius protrudes anteriorly
eg. monteggia fracture
- radius dislocated at humeral joint
- ulna complete fracture
eg. galeazzi fracture
- radius fracture protrudes post.
- while ulna dislocates opp direction (ant.)
name carpal bone sentence:
Some Lovers Try Positions That They Can’t Handle
proximal carpal bones: lateral - medial
- scaphoid
- lunate
- triquetral/trum
- pisiform
distal carpal bones: lateral- medial
- trapezium
- trapezoid
- capitate
- hamate
what forms/ covers the ‘carpal arch’?
- proximal carpal bones
- covered by flexor retinaculum
- space: carpal tunnel
fracture of carpal bones:
most common scaphoid
wrist and midcarpal joints: movement
- abduction
- adduction
- extension
- flexion
- circumduction
medial 4 fingers: movement
to the middle finger
- abduction
- adduction
- flexion
- extension
thumb: classify/ movement
- saddle joint
- abduction
- adduction (saggital)
- flexion
- extension
(coronal plane) - opposition
distal radioulnar joint: classification
synovial, pivot
distal radioulnar joint: articulating surfaces
- head of ulna
- ulnar notch of radius and articular disc
distal radioulnar joint: ligaments
- anterior
- posterior
distal radioulnar joint: movements
- supination
- pronation
distal radioulnar joint: innervation
- median
- radial nerves
where is articular disc on distal end located: and function
- triangular disc
- inferior to head of ulna
- articulates with wrist joint, NOT ulna
radiocarpal joint: classification
aka wrist joint
- synovial, condyloid
radiocarpal joint: articulating surfaces
- distal end of radius and articular disc
- scaphoid, lunate, triquetrum
radiocarpal joint: ligaments
- radial/ulnar (medial/lateral) collateral
- palmar and dorsal radiocarpal
radiocarpal joint: movements
- flexion
- extension
- abduction
- adduction
- circumduction
radiocarpal joint: innervation
- median
- ulnar
- radial nerves
midcarpal joint: classification
synovial, condyloid
midcarpal joint: articulating surfaces
proximal row with distal row of carpal bones
midcarpal joint: ligaments
- palmar
- dorsal
- interosseous ligaments
midcarpal joint: movements
- flexion
- extension
- abduction
- adduction
facilitates movement at wrist (radiocarpal) joint
fingers- carpometacarpal joint: classification
- synovial plane
thumb- carpometacarpal joint: classification
synovial, saddle
thumb- carpometacarpal joint: articulating surfaces
- trapezium
- base of 1st metacarpal
thumb- carpometacarpal joint: ligaments
joint capsule
thumb- carpometacarpal joint: movements
- flexion/ ext
- abd/ add
- medial/ lateral rotation
- circumduction
- opposition
