Intact visual imagery and impaired visual perception in a patient with visual agnosia.

@article{Behrmann1994IntactVI,
  title={Intact visual imagery and impaired visual perception in a patient with visual agnosia.},
  author={Marlene Behrmann and Morris Moscovitch and Gordon Winocur},
  journal={Journal of experimental psychology. Human perception and performance},
  year={1994},
  volume={20 5},
  pages={
          1068-87
        }
}
Although it is now well accepted that visual mental imagery and visual perception share common underlying mechanisms, there are several reports in which they are dissociated. Evidence for the separability of these processes is provided by a patient, C.K., who has a profound visual object recognition deficit attributable to an impairment in grouping or segmenting visual images. Despite this perceptual deficit, C.K. was able to draw objects in considerable detail from memory, and his knowledge of… 

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