Novel whitening approaches in functional settings

Vidal, Marc; Aguilera, Ana M.

doi:10.1002/sta4.516

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…To this end, we further propose a form of deconvolution by narrowbanding the signal into two additional subbands, from 0.2 to 1 Hz (

θ_{2}

) and from 0.4 to 1 Hz (

θ_{3}

). This technique is used as an alternative to taking first differences, which although it has previously allowed to establish a number of correlations with NE axonal activity (Joshi et al, 2016; Reimer et al, 2016), after a first normalisation of the pupil data, statistical effects are more unlikely to survive when differentiating (which is also a kind of normalisation); see Discussion in Vidal and Aguilera (2023).…”

Section: Methodsmentioning

confidence: 99%

Cholinergic‐related pupil activity reflects level of emotionality during motor performance

Vidal

Onderdijk

Aguilera

et al. 2023

Eur J of Neuroscience

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Pupil size covaries with the diffusion rate of the cholinergic and noradrenergic neurons throughout the brain, which are essential to arousal. Recent findings suggest that slow pupil fluctuations during locomotion are an index of sustained activity in cholinergic axons, whereas phasic dilations are related to the activity of noradrenergic axons. Here, we investigated movement induced arousal (i.e., by singing and swaying to music), hypothesising that actively engaging in musical behaviour will provoke stronger emotional engagement in participants and lead to different qualitative patterns of tonic and phasic pupil activity. A challenge in the analysis of pupil data is the turbulent behaviour of pupil diameter due to exogenous ocular activity commonly encountered during motor tasks and the high variability typically found between individuals. To address this, we developed an algorithm that adaptively estimates and removes pupil responses to ocular events, as well as a functional data methodology, derived from Pfaffs' generalised arousal, that provides a new statistical dimension on how pupil data can be interpreted according to putative neuromodulatory signalling. We found that actively engaging in singing enhanced slow cholinergic‐related pupil dilations and having the opportunity to move your body while performing amplified the effect of singing on pupil activity. Phasic pupil oscillations during motor execution attenuated in time, which is often interpreted as a measure of sense of agency over movement.

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“…To this end, we further propose a form of deconvolution by narrowbanding the signal into two additional subbands, from 0.2 to 1 Hz (

θ_{2}

) and from 0.4 to 1 Hz (

θ_{3}

Section: Methodsmentioning

confidence: 99%

Cholinergic‐related pupil activity reflects level of emotionality during motor performance

Vidal

Onderdijk

Aguilera

et al. 2023

Eur J of Neuroscience

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View full text Add to dashboard Cite

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Knee flexion of saxophone players anticipates tonal context of music

et al. 2023

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Music performance requires high levels of motor control. Professional musicians use body movements not only to accomplish and help technical efficiency, but to shape expressive interpretation. Here, we recorded motion and audio data of twenty participants performing four musical fragments varying in the degree of technical difficulty to analyze how knee flexion is employed by expert saxophone players. Using a computational model of the auditory periphery, we extracted emergent acoustical properties of sound to inference critical cognitive patterns of music processing and relate them to motion data. Results showed that knee flexion is causally linked to tone expectations and correlated to rhythmical density, suggesting that this gesture is associated with expressive and facilitative purposes. Furthermore, when instructed to play immobile, participants tended to microflex (>1 Hz) more frequently compared to when playing expressively, possibly indicating a natural urge to move to the music. These results underline the robustness of body movement in musical performance, providing valuable insights for the understanding of communicative processes, and development of motor learning cues.

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