Hydromethanolic leaf extract of ocimum gratissimum improves visuo-spatial learning and memory in mice

This study evaluated the effect of hydromethanolic leaf extract of Ocimum gratissimum (HMOG) on visuo-spatial learning and memory in mice. Mice were randomly assigned into four groups of 6 mice each. Group 1 received distilled water normal control; group 2 received 10 mg/kg body weight of Gingko biloba (standard drug); while groups 3 and 4 received 200 and 400 mg/kg body weight of the extract, respectively, for 21 consecutive days. The acute oral toxicity (LD50) study and qualitative phytochemical screening were carried out. The body weight of mice was monitored and behavioural indices such as swim latencies, quadrant durations and annulus crossings (annulus acquisition and reversal frequency) were measured using Morris water maze. The result of LD50 of the extract was above 5000 mg/kg body weight of mice and qualitative phytochemical result indicates the presence of World Journal of Pharmaceutical Research SJIF Imp ct Factor 8.074 Volume 8, Issue 1, 175-192. Research Article ISSN 2277– 7105 Article Received on 30 Oct. 2018, Revised on 20 Nov.2018, Accepted on 10 Dec. 2018 DOI: 10.20959/wjpr20191-13905 *Corresponding Author Folawiyo Moshood Abiola Department of Physiology, Faculty of Basic Medical Sciences, Ebonyi State University, PMB 053, Abakaliki, Ebonyi State, Nigeria.