Internal Representation of Movement Sequences on Reproduction of Static Drawings and the Trajectories of Moving Objects

Korneev, A. E.; Курганский, А. В.

doi:10.1007/s11055-014-9998-y

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Therefore, the lack of correlation between the Production and Perception tasks would be consistent with the distinction between recognition and recall (Hollingworth, 1913;Kintsch, 1970;Anderson and Bower, 1972;Tulving, 1976). Second, the Perception task may uniquely require additional processing stages, such as transforming dynamic movements into static images (Korneev and Kurgansky, 2014), or distinguishing mirror-reversed shapes (Davidoff and Warrington, 2001), processes associated with the parietal cortex.…”

Section: Dissociation Between Production and Perceptionmentioning

confidence: 99%

Movement Imitation via an Abstract Trajectory Representation in Dorsal Premotor Cortex

et al. 2019

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Humans are particularly good at copying novel and meaningless gestures. The mechanistic and anatomical basis for this specialized imitation ability remains largely unknown. One idea is that imitation occurs by matching body configurations. Here we propose an alternative route to imitation that depends on a body-independent representation of the trajectory path of the end-effector. We studied a group of patients with strokes in the left frontoparietal cortices. We found that they were equally impaired at imitating movement trajectories using the ipsilesional limb (i.e., the nonparetic side) that were cued either by an actor using their whole arm or just by a cursor, suggesting that body configuration information is not always critical for imitation and that a representation of abstract trajectory shape may suffice. In addition, imitation ability was uncorrelated to the ability to identify the trajectory shape, suggesting that imitation deficits were unlikely to arise from perceptual impairments. Finally, a lesion-symptom mapping analysis found that imitation deficits were associated with lesions in left dorsal premotor but not parietal cortex. Together, these findings suggest a novel body-independent route to imitation that relies on the ability to plan abstract movement trajectories within dorsal premotor cortex.The ability to imitate is critical for rapidly learning to produce new gestures and actions, but how the brain translates observed movements into motor commands is poorly understood. Examining the ability of patients with strokes affecting the left hemisphere revealed that meaningless gestures can be imitated by succinctly representing only the motion of the hand in space, rather than the posture of the entire arm. Moreover, performance deficits correlated with lesions in dorsal premotor cortex, an area not previously associated with impaired imitation of arm postures. These findings thus describe a novel route to imitation that may also be impaired in some patients with apraxia.

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Section: Dissociation Between Production and Perceptionmentioning

confidence: 99%

Movement Imitation via an Abstract Trajectory Representation in Dorsal Premotor Cortex

et al. 2019

View full text Add to dashboard Cite

show abstract

“…A lack of correlation between the Production and Perception tasks is therefore consistent with the distinction between recognition and recall (Hollingworth, 1913;Kintsch, 1970;Anderson and Bower, 1972;Tulving, 1976). Additionally, the Perception task may uniquely require the transformation from a dynamic movement to a static image (Korneev and Kurgansky, 2014), or the ability to mentally rotate body parts (Bonda et al, 1995;Zacks, 2008) and distinguish mirror-reversed shapes (Davidoff and Warrington, 2001) which are both associated with neural activity in parietal cortex. Thus, behavioral dissociations may arise not from perception of the stimulus motion per se but from secondary processes that are not shared between the two tasks.…”

Section: Dissociation Between Production and Perceptual Reportingmentioning

confidence: 99%

Movement imitation via an abstract trajectory representation in dorsal premotor cortex

Wong

Jax

Smith

et al. 2018

Preprint

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Humans are particularly good at copying novel and meaningless gestures. The mechanistic and anatomical basis for this specialized imitation ability remains largely unknown.One idea is that imitation occurs by matching body configurations. Here we propose an alternative route to imitation that depends on a body-independent representation of the trajectory path of the end-effector. We studied a group of patients with strokes in the left frontoparietal cortices. We found that they were equally impaired at imitating movement trajectories using the ipsilesional limb (i.e., the non-paretic side) that were cued either by an actor using their whole arm or just by a cursor, suggesting that body configuration is not always critical for imitation and that a representation of abstract trajectory shape may suffice. In addition, imitation ability was uncorrelated to the ability to identify the trajectory shape, suggesting a dissociation between producing trajectory shapes and perceiving their paths. Finally, a lesion-symptom mapping analysis found that imitation deficits were associated with lesions in left dorsal premotor but not parietal cortex. Together, these findings suggest a novel body-independent route to imitation that relies on the ability to plan abstract movement trajectories within dorsal premotor cortex. Significance StatementThe ability to imitate is critical for rapidly learning to produce new gestures and actions, but how the brain translates observed movements into motor commands is poorly understood. Examining the ability of patients with strokes affecting the left hemisphere revealed that meaningless gestures can be imitated by succinctly representing only the motion of the hand in space, rather than the posture of the entire arm. Moreover, performance deficits correlated with lesions in dorsal premotor cortex, an area not previously associated with impaired imitation of arm

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Возрастные Особенности Запоминания Последовательности Движений, Заданной Зрительным Образцом

Корнеев¹,

Lomakin²,

Курганский³

2020

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Описаны результаты исследования запоминания и удержания серийной информации в рабочей памяти в разных возрастах – у детей 9–11 лет, подростков и взрослых. Испытуемых просили воспроизводить ломаные линии – последовательности вертикальных и горизонтальных отрезков прямой линий, – предъявляемые (1) как статическое изображение и (2) как динамический объект – курсор, движущийся вдоль ломаной линии. Сложность траекторий задавалась количеством составляющих ее отрезков (от 4 до 6). Анализировалось число ошибок, а также временные параметры ответов испытуемых – время реакции (RT) и среднее время выполнения одного элемента последовательности (MT). Результаты показали, что с возрастом снижается число ошибок, причем это характерно в основном для режима динамического предъявления.

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Internal Representation of Movement Sequences on Reproduction of Static Drawings and the Trajectories of Moving Objects

Cited by 3 publications

References 28 publications

Movement Imitation via an Abstract Trajectory Representation in Dorsal Premotor Cortex

Movement Imitation via an Abstract Trajectory Representation in Dorsal Premotor Cortex

Movement imitation via an abstract trajectory representation in dorsal premotor cortex

Возрастные Особенности Запоминания Последовательности Движений, Заданной Зрительным Образцом

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