Motor learning and COMT Val158met polymorphism: Analyses of oculomotor behavior and corticocortical communication

Nogueira, Nathálya Gardênia de Holanda Marinho; Miranda, Débora Marques de; Albuquerque, Maicon Rodrigues; Ferreira, Bárbara de Paula; Parma, Juliana Otoni; Apolinário-Souza, Tércio; Bicalho, Lucas Eduardo Antunes; Ugrinowitsch, Herbert; Lage, Guilherme Menezes

doi:10.1016/j.nlm.2020.107157

Cited by 9 publications

(7 citation statements)

References 36 publications

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“…In conclusion, our results showed that the effects of practice organization in cross-limb transfer are distinct from intra- and inter-task transfer (Apolinário-Souza et al, 2019; Moxley, 1979; Nogueira et al, 2020). Our results are explained by the specificity of practice via constant practice.…”

Section: Discussionmentioning

confidence: 51%

Association Between Cross-Limb Transfer and Practice Organization

et al. 2022

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Although the importance of practice has been evidenced in early studies of cross-limb transfer, the association between cross-limb transfer and practice organization remains unknown. The two primary means of organizing practice are constant practice (CP) and variable practice (VP). When the same generalized motor program governs the motor responses, VP produces better transfer than CP. Thus, we hypothesized that VP would generate a higher cross-limb transfer level than CP. We assigned 40 participants to CP or VP groups and conducted an experiment consisting of three phases: pre-test, practice, and transfer test. At pre-test, all participants practiced eight trials of a sequence key-pressing task with the non-dominant hand (NDH). After the pre-test, all participants performed a practice phase of 72 trials with the dominant hand, but CP and VP groups underwent their different practice schedules (CP or VP) such that the CP group practiced a sequence key-pressing task in one sequence, and the VP group practiced four different sequences randomly. On the transfer test all partcipants completed eight trials with the NDH 24 hours after the practice phase. The CP group showed better performance than the VP group on the transfer test, and we concluded that the effects of practice organization in cross-limb transfer are distinct from intra- and inter-task transfer such that the specificity of practice explained the benefits of CG.

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Section: Discussionmentioning

confidence: 51%

Association Between Cross-Limb Transfer and Practice Organization

et al. 2022

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“…Here, synchronization refers either to the phase relation of EEG oscillations between two regions or coherence. This way of inferring synchronization is similar to the one used by other studies in motor practice 10,22,23,26,27 .…”

Section: Introductionmentioning

confidence: 78%

Study of cerebral cortico-cortical coherence during motor practice

Apolinário-Souza,

Lage,

Fernandes

2023

BJMB

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BACKGROUND: Coherence is one of the neural mechanisms related to communication and plasticity. The literature presents two divergent results regarding coherence and motor practice. One result suggests a decrease in coherence during practice, while the other indicates an increase in coherence throughout practice. AIM: Considering these two divergent results in the literature, this study aimed to examine the role of coherence in motor practice. We hypothesize that electrode pairs related to C3 (C3-P3 and C3-F3) show an increase of coherence during practice, while electrodes less related to motor action (F4, C4, and P4) may exhibit decreased. METHOD: Twenty-four right-handed participants practice 120 trials of a sequential key-pressing task. RESULTS: The results indicated, in the alpha upper and theta bands, from initiation to end of practice, the coherence increased in the F3-C3 electrode pair and decreased in the C3-C4, C3-P3, P3-P4, F3-P3, and C4-P4 electrodes pairs. CONCLUSION: The results partially confirmed the hypothesis. The coherence increases in the electrode pairings related to the motor execution and decreases between the lesser related. During the motor learning process, communication reduction occurred in groups of neurons not associated with the stimulus, and the potentiation of synaptic plasticity within groups of neurons associated with the stimulus occurred.

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“…Another sample-related limitation is the imbalance in the number of female and male participants, so that results regarding males should be considered with caution. However, our sample includes 179 men, a number at least equal to that found in other comparable genetic association studies (Nogueira et al, 2020;Panitz et al, 2018).…”

Section: Discussionmentioning

confidence: 99%