Noi dimostriamo nei sacerdoti vedici, rispetto ad un gruppo di controllo, un aumento focale dello spessore della corteccia cerebrale nelle regioni del lobo prefrontale di sinistra e a destra del lobo temporale. I risultati sono rilevanti per l’ipotesi corrente per quanto riguarda i processi cognitivi sottostanti la memorizzazione e il richiamo di memoria dichiarativa a lungo termine.
Focal cortical thickness correlates of exceptional memory training in Vedic priests
Giridhar P. Kalamangalam and Timothy M. Ellmore
Frontiers in Human Neuroscience
October 2014 | Volume 8 | Article 833
The capacity for semantic memory—the ability to acquire and store knowledge of the world—is highly developed in the human brain. In particular, semantic memory assimilated through an auditory route may be a uniquely human capacity. One method of obtaining neurobiological insight into memory mechanisms is through the study of experts. In this work, we study a group of Hindu Vedic priests, whose religious training requires the memorization of vast tracts of scriptural texts through an oral tradition, recalled spontaneously during a lifetime of subsequent spiritual practice. We demonstrate focal increases of cortical thickness in regions of the left prefrontal lobe and right temporal lobe in Vedic priests, in comparison to a group of matched controls. The findings are relevant to current hypotheses regarding cognitive processes underlying storage and recall of long-term declarative memory.