Effect of forearm-hand angle upon wrist flexion and extension forces
and upon prehension forces. Above, relationship between forearm-hand angle and
maximum forces of wrist flexion and extension measured at the carpometacarpal
joint. Heavy lines, flexion (volar flexion); light lines, extension (dorsal flexion).
Solid lines, averages; dotted lines, standard deviations. Unpublished data, UCLA,
15 male subjects. Below, relationship between forearm-hand angle and maximum
prehension force measured between thumb and opposing index and middle fingers
grasping a 1/2-inch block. Right hand, eight normal male subjects. Solid line, average;
dotted lines, standard deviations From a UC report