male 4 spatial memory test Article 3 adult 3 female 3 human 3 human experiment 3 controlled study 2 normal human 2 short term memory 2 working memory 2 2-back task 1 Bcl-2 1 Centella asiatica 1 Centella asiatica extract 1 Computational Biology 1 EEG 1 Humans 1 Memory, Short-Term 1 Mental Recall 1 Models, Neurological 1 Morris water maze test 1 P200 amplitude 1 P300 amplitude 1 Spatial memory 1 Stanford sleepiness scale 1 Trimethyltin 1 alpha rhythm 1 analysis of variance 1 animal cell 1