Hypothetically, you sustain an injury to the tendons of all anterior antebrachia
ID: 3511725 • Letter: H
Question
Hypothetically, you sustain an injury to the tendons of all anterior antebrachial muscles that cross the radiocarpal joint; however, the nerves and blood supply to the upper limb are undamaged. Would you still be able to open the door in a similar way as depicted (phase 1 and 2)? If so, which muscles would be used, and which actions would they generate at the joints of the wrist and the five digits? Are there any actions depicted in this movement that would be lost or weakened? If so, what are they, what joints would they affect, and what muscles were injured leading to the decrement?
https://www.youtube.com/watch?v=cpcDk0VutgM&feature=youtu.be
Explanation / Answer
the movements depicted in this video are- flexion of the wrist, metacarpophalangeal joints, interphalangeal joints and supination of the forearm.
since there is an injury to the muscles of the anterior compartment of the forearm- wrist and finger flexion cannot take place hence there will not be any grip to the hand. holding the door will not be possible.
action lost- flexion of wrist - flexor carpi ulnaris and radialis and palmaris longus.
Flexion of metacarpophalangeal joints and proximal interphalangeal joints at the 4 fingers, and the wrist- flexor digitorum superficialis and profundus .
flexion of thumb - flexor policis longus.
the compensatory action present from the upper limbs will be- for supination of the forearm.
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