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The influence of early aging on eye movements during motor simulation.

McCormick SA, Causer J, Holmes PS - Age (Dordr) (2014)

Bottom Line: Movement based interventions such as imagery and action observation are used increasingly to support physical rehabilitation of adults during early aging.Using eye movement metrics this paper reports findings that question the congruency of the three conditions.This concern for imagery was also seen in the less congruent temporal relationship in movement time between imagery and movement execution suggesting imagery inaccuracy in early aging.

View Article: PubMed Central - PubMed

Affiliation: Cognitive Motor Function Group, Institute for Performance Research, Manchester Metropolitan University Cheshire Faculty, Crewe Green Road, Crewe Cheshire, CW1 5DU, UK.

ABSTRACT
Movement based interventions such as imagery and action observation are used increasingly to support physical rehabilitation of adults during early aging. The efficacy of these more covert approaches is based on an intuitively appealing assumption that movement execution, imagery and observation share neural substrate; alteration of one influences directly the function of the other two. Using eye movement metrics this paper reports findings that question the congruency of the three conditions. The data reveal that simulating movement through imagery and action observation may offer older adults movement practice conditions that are not constrained by the age-related decline observed in physical conditions. In addition, the findings provide support for action observation as a more effective technique for movement reproduction in comparison to imagery. This concern for imagery was also seen in the less congruent temporal relationship in movement time between imagery and movement execution suggesting imagery inaccuracy in early aging.

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Related in: MedlinePlus

Top down schematic illustration of the experimental set up
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Related In: Results  -  Collection


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Fig1: Top down schematic illustration of the experimental set up

Mentions: Participants held the stylus in their dominant right hand and performed the Virtual Fitts’ Task (VFT, based on that used by McCormick et al. 2013) in three conditions: (i) AE; (ii) MI; and (iii) AO. In all conditions a HOME and FINISH button together with a TARGET square were presented on the tablet (see Fig. 1). The HOME and FINISH buttons were positioned approximately 200 mm away from the participant’s torso (midline). The TARGET was vertically aligned with the HOME button and the amplitude between the closest edges of the HOME and TARGET was constant (185 mm). Three TARGET squares of different sizes were used: small (4 mm2), medium (9 mm2) and large (20 mm2). According to the Fitts’ Law (Fitts 1954), the three target widths and the fixed inter-target distance lead to three indices of difficulty [ID = log2 (2A/W)]: respectively 6.5, 5.4 and 4.2.Fig. 1


The influence of early aging on eye movements during motor simulation.

McCormick SA, Causer J, Holmes PS - Age (Dordr) (2014)

Top down schematic illustration of the experimental set up
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4150898&req=5

Fig1: Top down schematic illustration of the experimental set up
Mentions: Participants held the stylus in their dominant right hand and performed the Virtual Fitts’ Task (VFT, based on that used by McCormick et al. 2013) in three conditions: (i) AE; (ii) MI; and (iii) AO. In all conditions a HOME and FINISH button together with a TARGET square were presented on the tablet (see Fig. 1). The HOME and FINISH buttons were positioned approximately 200 mm away from the participant’s torso (midline). The TARGET was vertically aligned with the HOME button and the amplitude between the closest edges of the HOME and TARGET was constant (185 mm). Three TARGET squares of different sizes were used: small (4 mm2), medium (9 mm2) and large (20 mm2). According to the Fitts’ Law (Fitts 1954), the three target widths and the fixed inter-target distance lead to three indices of difficulty [ID = log2 (2A/W)]: respectively 6.5, 5.4 and 4.2.Fig. 1

Bottom Line: Movement based interventions such as imagery and action observation are used increasingly to support physical rehabilitation of adults during early aging.Using eye movement metrics this paper reports findings that question the congruency of the three conditions.This concern for imagery was also seen in the less congruent temporal relationship in movement time between imagery and movement execution suggesting imagery inaccuracy in early aging.

View Article: PubMed Central - PubMed

Affiliation: Cognitive Motor Function Group, Institute for Performance Research, Manchester Metropolitan University Cheshire Faculty, Crewe Green Road, Crewe Cheshire, CW1 5DU, UK.

ABSTRACT
Movement based interventions such as imagery and action observation are used increasingly to support physical rehabilitation of adults during early aging. The efficacy of these more covert approaches is based on an intuitively appealing assumption that movement execution, imagery and observation share neural substrate; alteration of one influences directly the function of the other two. Using eye movement metrics this paper reports findings that question the congruency of the three conditions. The data reveal that simulating movement through imagery and action observation may offer older adults movement practice conditions that are not constrained by the age-related decline observed in physical conditions. In addition, the findings provide support for action observation as a more effective technique for movement reproduction in comparison to imagery. This concern for imagery was also seen in the less congruent temporal relationship in movement time between imagery and movement execution suggesting imagery inaccuracy in early aging.

Show MeSH
Related in: MedlinePlus