Effects of bilateral intra-accumbens infusion of saline, baclofen (660 pmol) or muscimol (660 pmol) on the duration (s) of different behaviour patterns observed during operant test sessions.

Behavior categories. Oral: oral stereotypies, including repeated licking and mouthing, but not of the body; Active: rapid moving around the test chamber; Rear: body supported on rear limbs only, but forelimbs may be against the sides of the test chamber; Lever: pressing either operant lever; Magazine: head inserted into the food magazine; Ingest: holding and eating a food pellet; Groom: body care movements using the mouth or forelimbs; Inactive: body supported on all four limbs with no locomotor movement; Off: not visible on screen.*p**p