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Eye movements during object recognition in visual agnosia

Charles Leek, E ; Patterson, Candy ; Paul, Matthew A ; Rafal, Robert ; Cristino, Filipe

Neuropsychologia, July 2012, Vol.50(9), pp.2142-53 [Tạp chí có phản biện]

E-ISSN: 1873-3514 ; PMID: 22627025 Version:1 ; DOI: 10.1016/j.neuropsychologia.2012.05.005

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  • Nhan đề:
    Eye movements during object recognition in visual agnosia
  • Tác giả: Charles Leek, E ; Patterson, Candy ; Paul, Matthew A ; Rafal, Robert ; Cristino, Filipe
  • Chủ đề: Agnosia -- Physiopathology ; Eye Movements -- Physiology ; Recognition (Psychology) -- Physiology ; Visual Perception -- Physiology
  • Là 1 phần của: Neuropsychologia, July 2012, Vol.50(9), pp.2142-53
  • Mô tả: This paper reports the first ever detailed study about eye movement patterns during single object recognition in visual agnosia. Eye movements were recorded in a patient with an integrative agnosic deficit during two recognition tasks: common object naming and novel object recognition memory. The patient showed normal directional biases in saccades and fixation dwell times in both tasks and was as likely as controls to fixate within object bounding contour regardless of recognition accuracy. In contrast, following initial saccades of similar amplitude to controls, the patient showed a bias for short saccades. In object naming, but not in recognition memory, the similarity of the spatial distributions of patient and control fixations was modulated by recognition accuracy. The study provides new evidence about how eye movements can be used to elucidate the functional impairments underlying object recognition deficits. We argue that the results reflect a breakdown in normal functional processes involved in the integration of shape information across object structure during the visual perception of shape.
  • Ngôn ngữ: English
  • Số nhận dạng: E-ISSN: 1873-3514 ; PMID: 22627025 Version:1 ; DOI: 10.1016/j.neuropsychologia.2012.05.005

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