Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The possible solutions for each target can be represented as a function of how activation of each biceps muscle contributes to control of the line on computer screen. Here we show the solution space for one of the indices of difficulty (ID 4). An optimal solution always exists i.e. equal use of both biceps muscles.
