Table 1 Open field test scoring parameters

Locomotion and exploration

Peripheral squares crossing

Number of peripheral squares crossed with all four paws of rat

Rearing

The frequency with which the rat stand against the wall of the maze

Central square crossing

Frequency of central squares crossing with all four paws of rat

Central square duration

Duration of time spent in the central squares by the rat

Anxiety

Freezing

Duration of time during which the rat was completely stationary

Stretch attend posture

Frequency of the forward elongation of animal head and shoulders followed by retraction to its original position

Urination

The number of streaks of urine

Defecation

Number of fecal boli produced