Joint Arthrokinematics

Question 1

what are the 3 fundamental arthrokinematic movements

Answer 1

roll
slide
spin

Question 2

describe the arthrokinematics of a convex-on concave movement

Answer 2

roll and slide motion move in opposite directions.

ex. glenohumeral joint: humerus on glenoid
superior roll of the humeral head with inferior slide

Question 3

describe the arthrokinematics of a concave-on concex movement

Answer 3

roll and slide move in the same direction

ex. tibial on femoral
tibial surface rolls and glides in the same direction

Question 4

what would happen if only rotation (rolling) happened during joint movement

Answer 4

it would not stay in the joint cavity and could impinge the joint, crushing bursaes or nerves

Question 5

What would happen if only a glide occurred during joint movement?

Answer 5

bone would scrape against bone, and could result in separation of the joint

Question 6

what tissues initiate, guide, and terminate arthrokinematics

Answer 6

Muscles initiate the action
ligaments guide
bone or soft tissue, and passive muscle tension terminates

Question 7

what is accessory movement in a joint

Answer 7

passive movement that happens to occur with primary movement

Question 8

describe amount of accessory movement available for a joint in an open packed vs a closed packed position

Answer 8

open packed: allows mobility in the joint and allows accessory movement

close packed: very stable, and does not allow for accessory movment

Question 9

what is the definition of a capsular pattern

Answer 9

the pattern of limitation in ROM when there is inflammation in the synovial joints