What is happening is the handleWrist function does not seem to be executing (or at least the servo controlled by this function does not move at all), and the handleFingers function executes but not as desired. The servo motor controlled by this function rotates 90 degrees when the force sensor is pressed, however it does not respond to anything after that. The servo just remains at 90 degrees.
As written in my previous reply, the expected behaviour is that the two functions handleWrist and handleFingers run "simultaneously". The handleWrist function reads the value of a gyroscope and moves a servo accordingly. The handleFingers function reads the value of a force sensor and moves a second servo accordingly.