Functional MRI results revealed that bilateral frontal poles (FPs, BA10), left superior parietal lobule (SPL), left premotor cortex (PMC), and left dorsolateral prefrontal cortex (DLPFC), were more engaged in both the study and recall phase of 2-digit condition for C.L. should elicit the strongest activity in the brain regions which are associated with his mnemonic. We hypothesized that 2-digit condition in C.L. Thus, 2-digit condition was included, with 1-digit numbers and letters as control conditions. used a digit-image mnemonic in studying and recalling lists of digits, namely associating 2-digit groups of “00” to “99” with images and generating vivid stories out of them ( Hu et al., 2009). Thirteen participants without any mnemonics training were included as controls. C.L., the current holder of Guinness World Record for reciting 67,890 digits in π, participated in this functional magnetic resonance imaging (fMRI) study. The underlying neural correlates, however, are seldom addressed. Some superior memorists demonstrated exceptional memory for reciting a large body of information.
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