Impulsion

[Jessica]

The act of impelling or driving onward, or the state of
being impelled; the sudden or momentary agency of a body in motion on
another body; also, the impelling force, or impulse.

[Vania]

Impulsion in Dressage. The driving action of a horses hind quarters.

[Tracie Lynn]

A strong urge to do something; an impulse.