Axonal Conduction Velocity Impacts Neuronal Network Oscillations
This addresses the problem of understanding how adaptive axonal properties influence brain dynamics, which is crucial for cognitive processes like learning and memory, though it is incremental in building on existing experimental evidence.
The study investigated how variations in axonal conduction velocity affect neuronal network oscillations, finding that small changes in signal transmission time (1-2 ms) led to substantial frequency shifts (0-120 Hz) in network oscillations.
Increasing experimental evidence suggests that axonal action potential conduction velocity is a highly adaptive parameter in the adult central nervous system. Yet, the effects of this newfound plasticity on global brain dynamics is poorly understood. In this work, we analyzed oscillations in biologically plausible neuronal networks with different conduction velocity distributions. Changes of 1-2 (ms) in network mean signal transmission time resulted in substantial network oscillation frequency changes ranging in 0-120 (Hz). Our results suggest that changes in axonal conduction velocity may significantly affect both the frequency and synchrony of brain rhythms, which have well established connections to learning, memory, and other cognitive processes.