The development of efficient communication in the human connectome.
van Blooijs, D.; van der Aar, J. F.; Huiskamp, G. J. M.; Castegnaro, G.; Demuru, M.; Zweiphenning, W. J. E. M.; van Eijsden, P.; Miller, K. J.; Leijten, F. S. S.; Hermes, D.
Show abstract
The structure of the human connectome develops from childhood throughout adolescence to middle age, but how this affects the speed of neuronal signaling is not well described. To understand the maturation process of transmission speed across the connectome, we stimulated electrocorticographic (ECoG) electrode pairs in 75 human subjects of 4 to 51 years old. We then measured the latency of cortico-cortical evoked responses in other electrodes. Each year, responses got faster, until transmission speed reached a minimum latency at the age of 29-44 years old. Responses during middle age were about two times faster compared to childhood. These increases in speed were observed in both long- and short-range connections between and within frontal, central, parietal, and temporal areas. These findings indicate that long-range and short-range communication between brain regions increase in efficiency well throughout adolescence.
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