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Adaptation of a Haptic Robot in a 3T fMRI
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How does ageing affect grasp adaptation to a visual-haptic size conflict?

Samuel Couth1, Emma Gowen2, Ellen Poliakoff2

  • 1Division of Human Communication, Development and Hearing, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, A3.16 Ellen Wilkinson Building, Oxford Road, M13 9PL, Manchester, UK. Samuel.couth@manchester.ac.uk.

Experimental Brain Research
|May 26, 2018
PubMed
Summary

Older adults effectively adapt their grasping behavior to visual-haptic size conflicts, similar to younger adults. This sensorimotor adaptation remains intact, suggesting physical hand capabilities, not age-related decline, influence adaptation differences.

Keywords:
AgeingGrasp adaptationHapticsMotor control

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Area of Science:

  • Neuroscience
  • Motor Control
  • Human Aging

Background:

  • Motor behavior adaptation can be impaired in older adults.
  • Investigating age-related changes in sensorimotor adaptation is crucial for understanding motor control.
  • Grasping adaptation to visual-haptic conflicts is a key area of study in motor neuroscience.

Purpose of the Study:

  • To determine if older adults' grasping adaptation to visual-haptic size conflicts differs from younger adults.
  • To explore the influence of age on the scale and speed of grasp aperture adaptation.
  • To differentiate between age-related sensory/cognitive decline and physical limitations in motor adaptation.

Main Methods:

  • Participants: 30 older adults and 18 young adults.
  • Task: Grasping a hidden block while viewing a congruent visual representation, with covert size changes introduced.
  • Measurement: Scale and speed of maximum grasp aperture adaptation to size discrepancies.

Main Results:

  • Older adults adapted successfully to visual-haptic size conflicts, comparable to young adults.
  • A slight decrease in adaptation was observed in older adults when the hidden block size increased.
  • Adaptation speed did not differ between age groups; awareness of conflict accelerated adaptation.
  • Findings suggest physical hand capabilities, not cognitive/sensory decline, underlie minor age-related differences.

Conclusions:

  • Sensorimotor adaptation for grasping is generally preserved in cognitively healthy older adults.
  • Physical limitations of the hand may play a role in subtle age-related differences in motor adaptation.
  • Future research should further explore the interplay of physical and neural factors in aging motor control.