Jean-martin charcot and pierre janet were interested in a condition that results in the temporary loss of motor control or cognitive functions. What were they studying?

I believe the answer is: hysteria

Hysteria is the uncontrollable emotion that is caused by overexcitement.

From the perspective of other people, hysteria tend to be seen as exaggeration of expression without noticing that it is caused by the problems in human's neurones. People who suffer from hysteria are pre-dominantly women even though scientists still haven't figure out the reason for this.