Table-2.

Passive avoidance test results – 90 days treatment.

Groups	Retention
	Time spent in small compartment (sec)	No. of crossings
Control	75.67±12.02	1.667±0.51
NAC	77.67±7.98	1.69±0.89
As control	146.0±15.35*	4.12±0.81*
As+NAC	90.5±18.01#	2.06±0.51#
As+MP(350)	110.5±17.08#	2.33±1.21#
As+MP(530)	112±17.17#	2.00±0.63#
As+MP(700)	92±11.51#	1.50±0.54#
As+NAC+MP(350)	89.3±7.35#	2.04±0.21#
As+NAC+MP(530)	98.1±11.08#	2.00±0.16#

In each group n=6. Values are mean ± SD.

^*P<0.01: compared to the normal control group; #P<0.01: compared to As control group. NAC – N-Acetylcysteine, As- arsenic, MP (350) - Mucuna pruriens aqueous seed extract 350 mg/kg body weight, MP (530) - Mucuna pruriens aqueous seed extract 530 mg/kg body weight, MP (700) - Mucuna pruriens aqueous seed extract 700 mg/kg body weight