Magnocellular-parvocellular imbalance hampers mirror image discrimination
(2022) 22nd meeting of the European Society for Cognitive Psychology (ESCoP) — Location: Lille (29.August.2022)
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- Abstract
- From the retina, information is conveyed to the brain through two main complementary channels: a parvocellular (P) channel highly sensitive to stimuli of high spatial frequency, high-contrast and low-temporal frequency, and a magnocellular (M) channel mostly sensitive to stimuli with complementary characteristics. Recent neuropsychological evidence suggests that efficiency at discriminating mirror images may depend on the balance between the involvement of M- and P- channels in processing a visual stimulus. To test and clarify this hypothesis, we measured the efficiency of the M and P channels of 40 participants, as well as their ability to discriminate shapes that differed in terms of either a plane-rotation, a mirror reflection across a vertical axis, or a mirror reflection across a shape-based axis. We found significant positive correlations between an index of P-M imbalance (P-efficiency – M-efficiency) and individuals’ efficiency at discriminating both types of mirror images, but not plane-rotations.
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Citations
Houbben, M., & Vannuscorps, G. (2022). Magnocellular-parvocellular imbalance hampers mirror image discrimination. 22nd meeting of the European Society for Cognitive Psychology (ESCoP), Lille. https://hdl.handle.net/2078.5/102807