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Comment
. 2022 Feb;39(1-2):99-102.
doi: 10.1080/02643294.2022.2083947. Epub 2022 Jun 8.

Davida's deficits: weak encoding of impoverished stimuli or faulty egocentric representation?

Dina V Popovkina  1 , Anitha Pasupathy  2   3
Affiliations
Comment

Davida's deficits: weak encoding of impoverished stimuli or faulty egocentric representation?

Dina V Popovkina et al. Cogn Neuropsychol. 2022 Feb.

Abstract

Vannuscorps and colleagues present the fascinating case of Davida, a young person who makes systematic errors in judgments related to orientations of sharp or high-contrast visual stimuli. In this commentary, we discuss the findings in the context of observations from mid-level ventral visual stream physiology. We propose two additional interpretations for the specificity of the behavioural deficits: the observed impairments in orientation judgments may be consistent with a system that is not able to unambiguously represent certain impoverished stimuli, or with a system that is not able to translate visual input into head- or body-centered coordinates. Davida's case offers a unique glimpse into the complex cascade of transformations that enable accurate orientation judgments, and sparks curiosity about which mechanistic disruptions can produce such specific unstable percepts.

Keywords: Ventral visual pathway; object recognition; object-centered reference frame; shape perception; visual cortex.

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