The experimenter pointed to the digits with the index finger and the child was required to respond aloud.
The index finger is driven separately to the other digits.
As such, only the tendons essential for the index finger flexion/extension and abduction/adduction are studied and mimicked in our design.
Finally, the operator releases the object and grasps again using his thumb and index finger.
For example, a circling movement of the index finger to indicate "time passing" would literally indicate a clock.
Subjects were instructed to restart from index finger opposition when they made an error in the sequence at any step.
The design of the thumb differs from the fingers by allowing an adduction towards the index finger and an opposition towards the other fingers.
Finally, the 10 deviant children had a larger difference in temperature between the right and left index finger, suggesting greater sympathetic lability.
