TABLE 2.

Behavior patterns scored during acute social defeat exposure.

Behavior	Definition
Attacking	A lunge at the CD-1 dominant male mouse with physical contact occurring
Avoiding; actively maintaining distance from the CD-1 dominant male	Directed movement away from the CD-1 dominant male mouse at walking speed, occurring before direct contact with the respective individual
Chasing	Following the fleeing CD-1 dominant male mouse at running pace
Mounting	Standing with two forepaws on the back of the CD-1 dominant male mouse, frequently resembling male-female copulation
Scouting	An attempt (stretched-attend posture or exploring at walking speed) to determine whether the threat (the CD-1 dominant male mouse) is still present
Flight	Directed movement away from the CD-1 dominant male mouse at running pace
Submissive upright posture	Standing on the hind legs, raising the forelimbs and presenting the belly to the threat (the CD-1 dominant male mouse)
Attacks received	Being jumped at by the CD-1 dominant male mouse with physical contact occurring
Chasing received	Being followed by the CD-1 dominant male mouse at running pace
Mounts received	Receiving the two forepaws of the CD-1 dominant male mouse on the back
Inactivity	The absence of any other behavior listed above