Article

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.
CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS