Slow changing postural cues cancel visual field dependence on self-tilt detection

Macaluso, Thomas; Mestre, Daniel; Bringoux, Lionel

doi:10.1016/j.gaitpost.2014.09.027

Cited by 10 publications

(12 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Within this view, higher COP entropy could indicate that they deployed a more efficient balancing. The efficiency with which postural balance (low COP variability and low attentional investment) is controlled is closely tied to the selection of an appropriate mode of spatial referencing (generally proprioceptive-based; Berthoz, 1991; Paillard, 1991; Kluzik et al, 2005; Streepey et al, 2007b; Isableu et al, 2010, 2011; Mergner, 2010; Slaboda et al, 2011a,b; Brady et al, 2012; Scotto Di Cesare et al, 2015). Several authors showed that these modes of spatial referencing are known to impact the attentional investment (Goodenough et al, 1987; Marendaz et al, 1988; Marendaz, 1989; Bailleux et al, 1990; Yan, 2010; Agathos et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Regularity of Center of Pressure Trajectories in Expert Gymnasts during Bipedal Closed-Eyes Quiet Standing

Isableu

Hlavackova

Diot

et al. 2017

Front. Hum. Neurosci.

View full text Add to dashboard Cite

We compared postural control of expert gymnasts (G) to that of non-gymnasts (NG) during bipedal closed-eyes quiet standing using conventional and nonlinear dynamical measures of center of foot pressure (COP) trajectories. Earlier findings based on COP classical variables showed that gymnasts exhibited a better control of postural balance but only in demanding stances. We examined whether the effect of expertise in Gymnastic can be uncovered in less demanding stances, from the analysis of the dynamic patterns of COP trajectories. Three dependent variables were computed to describe the subject’s postural behavior: the variability of COP displacements (ACoP), the variability of the COP velocities (VCoP) and the sample entropy of COP (SEnCoP) to quantify COP regularity (i.e., predictability). Conventional analysis of COP trajectories showed that NG and G exhibited similar amount and control of postural sway, as indicated by similar ACoP and VCoP values observed in NG and G, respectively. These results suggest that the specialized balance training received by G may not transfer to less challenging balance conditions such as the bipedal eyes-closed stance condition used in the present experiment. Interestingly, nonlinear dynamical analysis of COP trajectories regarding COP regularity showed that G exhibited more irregular COP fluctuations relative to NG, as indicated by the higher SEnCoP values observed for the G than for the NG. The present results showed that a finer-grained analysis of the dynamic patterns of the COP displacements is required to uncover an effect of gymnastic expertise on postural control in nondemanding postural stance. The present findings shed light on the surplus value in the nonlinear dynamical analysis of COP trajectories to gain further insight into the mechanisms involved in the control of bipedal posture.

show abstract

Section: Discussionmentioning

confidence: 99%

Regularity of Center of Pressure Trajectories in Expert Gymnasts during Bipedal Closed-Eyes Quiet Standing

Isableu

Hlavackova

Diot

et al. 2017

Front. Hum. Neurosci.

View full text Add to dashboard Cite

show abstract

“…Specifically, they had to align a tilted rod along the gravitational vertical when facing a visual frame. The frame orientation was modified according to a standardized order (Isableu et al, 1997 ; Bringoux et al, 2009 ; Scotto Di Cesare et al, 2015 ): 0°, −18°, +18°, −8°, +8°, −28°, +28°, −38°, +38°, 0° positive values indicate rightward tilts while negative values indicate leftward tilts relative to the gravitational vertical). For each of the 9 frame orientations, 2 trials were performed with initial rod orientations alternatively set right or left at a magnitude ranging from ±10° to ±50° relative to vertical.…”

Section: Methodsmentioning

confidence: 99%

“…In this self-tilt detection session, four experimental conditions were presented (Figure 1C ; see also Scotto Di Cesare et al, 2015 ): Sbwd : backward rotation of the visual scene (top toward the subject) without body rotation; Bfwd : forward rotation of the body without any visual scene; BfwdS : forward body rotation with a visual scene remaining static relative to the subject; BfwdSbwd : forward body rotation with backward visual scene rotation relative to the subject. All subjects performed 3 trials in each of the 4 aforementioned conditions, which were presented in a pseudo-random, counterbalanced order, to avoid any potential learning effect.…”

Section: Methodsmentioning

confidence: 99%

Do Visual and Vestibular Inputs Compensate for Somatosensory Loss in the Perception of Spatial Orientation? Insights from a Deafferented Patient

Bringoux

Cesare

Borel

et al. 2016

Front. Hum. Neurosci.

View full text Add to dashboard Cite

The present study aimed at investigating the consequences of a massive loss of somatosensory inputs on the perception of spatial orientation. The occurrence of possible compensatory processes for external (i.e., object) orientation perception and self-orientation perception was examined by manipulating visual and/or vestibular cues. To that aim, we compared perceptual responses of a deafferented patient (GL) with respect to age-matched Controls in two tasks involving gravity-related judgments. In the first task, subjects had to align a visual rod with the gravitational vertical (i.e., Subjective Visual Vertical: SVV) when facing a tilted visual frame in a classic Rod-and-Frame Test. In the second task, subjects had to report whether they felt tilted when facing different visuo-postural conditions which consisted in very slow pitch tilts of the body and/or visual surroundings away from vertical. Results showed that, much more than Controls, the deafferented patient was fully dependent on spatial cues issued from the visual frame when judging the SVV. On the other hand, the deafferented patient did not rely at all on visual cues for self-tilt detection. Moreover, the patient never reported any sensation of tilt up to 18° contrary to Controls, hence showing that she did not rely on vestibular (i.e., otoliths) signals for the detection of very slow body tilts either. Overall, this study demonstrates that a massive somatosensory deficit substantially impairs the perception of spatial orientation, and that the use of the remaining sensory inputs available to a deafferented patient differs regarding whether the judgment concerns external vs. self-orientation.

show abstract

“…Les résultats obtenus au RFT (non présentés ici) n'ont pas permis de sélectionner un panel conséquent de participants à forte dépendance à l'égard du champ. Le score maximum calculé était de 5,88 tandis que classiquement il est commun d'observer des scores supérieurs à 10 (Scotto Di Cesare, Macaluso, Mestre, & Bringoux, 2015). Notre cohorte de participants ne contenant donc pas de participants fortement DC, l'extrapolation de nos résultats à une population plus large reste tout de même limitée.…”

Section: Discussionunclassified

Perception de la verticale en présence d’indices d’orientation visuels ou sonores : vers une dépendance allocentrée ?

Chomienne

Goulon

Parseihian

et al. 2020

Mov Sport Sci/Sci Mot

View full text Add to dashboard Cite

L’étude de la perception de la verticale initiée par Witkin et Asch (1948) a abouti au concept de dépendance à l’égard du champ, distinguant les individus dans leur propension à être influencés par l’inclinaison d’un cadre visuel sur le jugement de la direction gravitaire (i.e., verticale subjective [VS]). Depuis, cette dépendance est souvent considérée comme révélatrice d’une sensibilité préférentielle aux informations visuelles par rapport à d’autres modalités sensorielles (e.g., vestibulaires ou somesthésiques). Ce travail pilote vise à reconsidérer la notion de dépendance à l’égard du champ dans la perception spatiale. Nous faisons l’hypothèse que des informations d’orientation issues d’un même cadre de référence centré sur l’environnement (i.e., référentiel allocentré) puissent conduire à une distinction comparable entre participants, quelle que soit la modalité sensorielle considérée. Face à deux scènes allocentrées (visuelle et sonore), 23 participants ont été testés sur une tâche d’ajustement de la VS. Nos résultats montrent une forte corrélation entre les ajustements dans les deux conditions sensorielles où la scène allocentrée était inclinée. Ceci suggère que les individus peuvent se différencier dans le traitement des informations spatiales issues d’un même cadre de référence, et ce de la même façon quelle que soit la modalité sensorielle permettant de relayer ces informations.

show abstract

Slow changing postural cues cancel visual field dependence on self-tilt detection

Cited by 10 publications

References 30 publications

Regularity of Center of Pressure Trajectories in Expert Gymnasts during Bipedal Closed-Eyes Quiet Standing

Regularity of Center of Pressure Trajectories in Expert Gymnasts during Bipedal Closed-Eyes Quiet Standing

Do Visual and Vestibular Inputs Compensate for Somatosensory Loss in the Perception of Spatial Orientation? Insights from a Deafferented Patient

Perception de la verticale en présence d’indices d’orientation visuels ou sonores : vers une dépendance allocentrée ?

Contact Info

Product

Resources

About