التفاصيل البيبلوغرافية
| العنوان: |
Acute exercise as a modifier of neocortical plasticity and aperiodic activity in the visual cortex. |
| المؤلفون: |
Cadwallader, Claire J.1 (AUTHOR) claire.cadwallader@monash.edu, Steiniger, Jennifer1 (AUTHOR), Cooper, Patrick S.1 (AUTHOR), Zhou, Shou-Han2 (AUTHOR), Hendrikse, Joshua1 (AUTHOR), Sumner, Rachael L.3 (AUTHOR), Kirk, Ian J.4 (AUTHOR), Chong, Trevor T.-J.1,5,6 (AUTHOR), Coxon, James P.1 (AUTHOR) james.coxon@monash.edu |
| المصدر: |
Scientific Reports. 5/9/2023, Vol. 13 Issue 1, p1-11. 11p. |
| مصطلحات موضوعية: |
*VISUAL cortex, *HIGH-intensity interval training, *VISUAL evoked potentials, *LONG-term potentiation, *VISUAL perception |
| مستخلص: |
Long-term potentiation (LTP) is a form of neuroplasticity commonly implicated in mechanistic models of learning and memory. Acute exercise can boost LTP in the motor cortex, and is associated with a shift in excitation/inhibition (E:I) balance, but whether this extends to other regions such as the visual cortex is unknown. We investigated the effect of a preceding bout of exercise on LTP induction and the E:I balance in the visual cortex using electroencephalography (EEG). Young adults (N = 20, mean age = 24.20) engaged in 20 min of high-intensity interval training (HIIT) exercise and rest across two counterbalanced sessions. LTP was induced using a high frequency presentation of a visual stimulus; a "visual tetanus". Established EEG markers of visual LTP, the N1b and P2 component of the visual evoked potential, and an EEG-derived measure of the E:I balance, the aperiodic exponent, were measured before and after the visual tetanus. As expected, there was a potentiation of the N1b following the visual tetanus, with specificity to the tetanised stimulus, and a non-specific potentiation of the P2. These effects were not sensitive to a preceding bout of exercise. However, the E:I balance showed a late shift towards inhibition following the visual tetanus. A preceding bout of exercise resulted in specificity of this E:I balance shift to the tetanised stimulus, that was not seen following rest. This novel finding suggests a possible exercise-induced tuning of the visual cortex to stimulus details following LTP induction. [ABSTRACT FROM AUTHOR] |
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