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Cognitive performance and brain dynamics during walking with a novel bionic foot: A pilot study.

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Transfemoral amputees using a novel powered prosthesis showed increased attentional demands during gait, unlike transtibial amputees. This highlights the need for better control of prosthetic propulsive forces to mitigate fall risks.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Rehabilitation Engineering

Background:

  • Gait involves complex neural processes and attentional demands.
  • Prosthetic devices aim to restore natural gait but can alter neural control and cognitive load.
  • Understanding neural dynamics and attention is crucial for optimizing prosthetic design and use.

Purpose of the Study:

  • To determine neural dynamics during gait using electroencephalography (EEG) and source localization.
  • To investigate attentional demand during walking in able-bodied individuals and amputees using different prostheses.
  • To compare neural responses to a novel powered transtibial prosthesis versus a current passive device.

Main Methods:

  • EEG data collected during treadmill walking in able-bodied individuals and unilateral transtibial/transfemoral amputees.
  • Participants performed a sustained attention task (go-no go) during walking.
  • Analysis of motor-related cortical potentials and brain source activity during gait.

Main Results:

  • Transfemoral amputees exhibited higher attentional demands with the novel powered prosthesis compared to able-bodied individuals and their own passive prosthesis.
  • No significant differences in motor-related cortical potentials were found between transtibial amputees and able-bodied individuals.
  • Increased brain source activity observed in transtibial amputees using the novel prosthesis during the toe-off phase.

Conclusions:

  • Novel powered prostheses may increase cognitive load, particularly for transfemoral amputees, necessitating improved propulsive force control.
  • Neural adaptations in transtibial amputees suggest increased sensory feedback for postural control with the new device.
  • Further research is needed to understand long-term effects and optimize prosthetic integration for diverse user groups.