photograph – n. a picture made by a camera

neural – adj. of, relating to, or affecting a nerve or the nervous system

abnormality – n. something that is not usual, expected, or normal

previous – adj. going before in time or order

functional MRI – n. magnetic resonance imaging used to detect physical changes (as of blood flow) in the brain resulting from increased neuronal activity

draw a blank – expression to fail to gain a desired object (such as information sought) also : to be unable to think of something

inference – n. the act or process of reaching a conclusion about something from known facts or evidence