Step I Claw Hand Question

[PsychoDan]

Can someone explain this please...

If the ulnar nerve controls flexion of fouth and fifth digit and median nerve controls flexion of 1-3, how does a dysfunction in the ulnar/median result in claw hand?

Thanks!

 

[Idiopathic]

its due to imbalance between the intrinsic muscles, resulting in overextension of the affected side, since your fingers are typically flexed, in the instance of a claw hand you have poor/no flexion in the affected region and hyperextension instead. as you attempt to extend the digits, you get MCP hyperextension and PIP flexion typically due to a low median injury.

 

[PsychoDan]

its due to imbalance between the intrinsic muscles, resulting in overextension of the affected side, since your fingers are typically flexed, in the instance of a claw hand you have poor/no flexion in the affected region and hyperextension instead. as you attempt to extend the digits, you get MCP hyperextension and PIP flexion typically due to a low median injury.

thanks, idio... 👍