Case $1$:

A $22-$year$-$old college athlete had his cast removed $2$ days ago. Eight weeks ago, he sustained a

Colles' fracture of his dominant right wrist when he fell on an outstretched hand during a

basketball game. He presents to an outpatient physical therapy clinic today for his initial

evaluation. He reports some pain in his forearm and hand with numbness and tingling in his

thumb, index, middle, and half of his ring finger. His right grip strength is $50\%$ weaker than the

left. There is observable atrophy in the right thenar eminence, and he describes a "pressure"

sensation at his wrist. He notices that his right hand falls asleep sometimes when doing

homework on the computer. Motion at end$-$range wrist flexion and extension increases his pain

and neurologic symptoms. The patient has a positive Phalen's test and a positive Tinel's sign at

the wrist.

Where is the lesion $($central or peripheral$)?$ Which neuron in the sensory pathways is affected?

What specific examination signs may may lead you to a diagnosis $($and which are likely due only

to the fracture$)?$

What sensory pathway is affected when the numbness occurs?

What sensory pathway$($s$)$ is$/$are activated when the pain occurs?

$2$:

Sketch the DC$/$ML for both upper and lower extremity.