In a recognition memory task, subje

In a recognition memory task, subjects (human being) viewed a series of different visual objects thatoccurred at different times within the breathing cycle. The interval between displaying images was 3–6seconds. After a 20 min break, subjects were presented with the old pictures from the encoding sessionplus an equal number of new pictures; and the subjects pressed the “Yes” button if they had previouslyviewed the object’s image, and pressed the “No” button if the image was new. Subjects' memoryperformance was examined in the episodes of inspiration and expiration, and in mouth breathing andnasal breathing (In figures “*” means p < 0.05 which indicates significant difference between groups).