0 the lower part of the arm, between the wrist and the elbow (= the middle of the arm where it bends) -- 前臂
If the elbow is already flexed, the hand is guided around the elbow to grasp the fetus' forearm and wrist.
Although these appear flexed, details of the forearms and hands are obliterated.
The forearms are held upraised from the elbows, and the "hands" are slightly extended in a grasping or attack position.
In reality of course the angles and will be nonlinear functions of high-dimensional neural population vectors corresponding to arm and forearm muscle parameters.
Forearm readings were avoided after experiencing difficulties due to the presence of hair in some subjects and superficial veins in others.
An initial screening exam was performed by questionnaire and by direct palpation of the forearm during requested finger motions.
Tracking errors: (top) upperarm; (bottom) forearm; solid line for the case with feedback stabilizing; dotted line for the case without feedback stabilizing.
Each had two pieces of uniform, serge and flannel tied loosely over the forearm.
