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add some background Memory in brain Memory is usually considered a diffusely stored associative process¡Xthat is, it puts together information from many different sources. Although research has failed to identify specific sites in the brain as locations of individual memories, certain brain areas are critical for memory to function. Immediate recall¡Xthe ability to repeat short series of words or numbers immediately after hearing them¡Xis thought to be located in the auditory associative cortex. Short-term memory¡Xthe ability to retain a limited amount of information for up to an hour¡Xis located in the deep temporal lobe. Long-term memory probably involves exchanges between the medial temporal lobe, various cortical regions, and the midbrain.
During the last 30 years, scientists have confirmed that the generation of new neurons, a process called neurogenesis, occurs in many animals, including mice, birds, and dogs. In March 1998 researchers showed that adult monkeys could produce new brain cells in the hippocampus, a brain region linked to memory formation. This finding was extended to humans in November 1998.
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