Rights statement: This is the author’s version of a work that was accepted for publication in Neuropsychologia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Neuropsychologia, 150, 2021 DOI: 10.1016/j.neuropsychologia.2020.107690
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Action observation and imitation in Parkinson’s disease
T2 - The influence of biological and non-biological stimuli
AU - Bek, Judith
AU - Gowen, Emma
AU - Vogt, Stefan
AU - Crawford, Trevor
AU - Poliakoff, Ellen
N1 - This is the author’s version of a work that was accepted for publication in Neuropsychologia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Neuropsychologia, 150, 2021 DOI: 10.1016/j.neuropsychologia.2020.107690
PY - 2021/1/8
Y1 - 2021/1/8
N2 - Action observation and imitation have been found to influence movement in people with Parkinson’s disease (PD), but simple visual stimuli can also guide their movement, and previous studies have not directly compared these. To investigate whether action observation may provide a more effective stimulus,the present study examined the effects of observing human pointing movements and simple visual cues on hand kinematics and eye movements in people with mild to moderate PD and age-matched controls.In Experiment 1 participants observed videos of movement sequences between horizontal positions, depicted by a simple cue with or without a moving human hand, then imitated the sequence either without further visual input (consecutive) or while watching the video again (concurrent). Modulation of movementduration in accordance with changes in the observed stimulus increased when the simple cue was accompanied by the hand, and in the concurrent task, whereas modulation of horizontal amplitude was greater with the simple cue alone and in the consecutive task.Experiment 2 compared imitation of kinematically-matched dynamic biological (human hand) and nonbiological (shape) stimuli, which moved with a high or low vertical trajectory. Both groups exhibited greater modulation for the hand than the shape, and differences in eye movements suggested closer tracking ofthe hand. Despite producing slower and smaller movements overall, the PD group showed a similar pattern of imitation to controls across conditions. The findings demonstrate that observing human action influences aspects of movement such as duration or trajectory more strongly than non-biological stimuli, particularlyduring concurrent imitation.
AB - Action observation and imitation have been found to influence movement in people with Parkinson’s disease (PD), but simple visual stimuli can also guide their movement, and previous studies have not directly compared these. To investigate whether action observation may provide a more effective stimulus,the present study examined the effects of observing human pointing movements and simple visual cues on hand kinematics and eye movements in people with mild to moderate PD and age-matched controls.In Experiment 1 participants observed videos of movement sequences between horizontal positions, depicted by a simple cue with or without a moving human hand, then imitated the sequence either without further visual input (consecutive) or while watching the video again (concurrent). Modulation of movementduration in accordance with changes in the observed stimulus increased when the simple cue was accompanied by the hand, and in the concurrent task, whereas modulation of horizontal amplitude was greater with the simple cue alone and in the consecutive task.Experiment 2 compared imitation of kinematically-matched dynamic biological (human hand) and nonbiological (shape) stimuli, which moved with a high or low vertical trajectory. Both groups exhibited greater modulation for the hand than the shape, and differences in eye movements suggested closer tracking ofthe hand. Despite producing slower and smaller movements overall, the PD group showed a similar pattern of imitation to controls across conditions. The findings demonstrate that observing human action influences aspects of movement such as duration or trajectory more strongly than non-biological stimuli, particularlyduring concurrent imitation.
KW - Parkinson's disease
KW - Action observation
KW - Imitation
KW - Motor simulation
KW - Motor imagery
KW - Eye movements
KW - Kinematics
KW - Neurorehabilitation
U2 - 10.1016/j.neuropsychologia.2020.107690
DO - 10.1016/j.neuropsychologia.2020.107690
M3 - Journal article
VL - 150
JO - Neuropsychologia
JF - Neuropsychologia
SN - 0028-3932
M1 - 107690
ER -