The Big Sleep (1946 film) war. Bacall's agent, Charles K. Feldman, asked that portions of the film be re-shot to capitalize on their chemistry and counteract the negative press Bacall had received for her 1945 performance in "Confidential Agent" which was released prior to "The Big Sleep" even though produced after it. Producer Jack L. Warner agreed, and new scenes for "The Big Sleep", such as the sexually suggestive racehorse dialogue, were added (scripted by an uncredited Julius Epstein). The re-shot ending featured Peggy Knudsen as Mona Mars because Pat Clark, the originally cast actress, was unavailable. Furthermore, the parts of James Flavin and Thomas
Sleep and memory Results indicate that sleep deprivation does not significantly affect recognition of faces, but does produce a significant impairment of temporal memory (discriminating which face belonged to which set). Caffeine was found to have a greater effect on the sleep deprived group as compared to the placebo group deprived of sleep but still performed worse than both control groups. Sleep deprivation was also found to increase beliefs of being correct, especially if they were wrong. Brain imaging studies of those sleep deprived found that the greatest reduction in metabolic rate is in the prefrontal cortex. A blood-oxygen-level dependent (BOLD) fMRI was