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Changes in spatial self-consciousness elicit grid cell-like representation in the entorhinal cortex.
Proc Natl Acad Sci U S A
March 2024
Neuro-X Institute, Faculty of Life Sciences, Swiss Federal Institute of Technology (École Polytechnique Fédérale de Lausanne), Geneva 1202, Switzerland.
Article Synopsis
- Grid cells in the entorhinal cortex help track an individual's location by integrating environmental cues and signals from the body, which also contribute to our sense of self.
- Researchers investigated whether illusory changes in self-location, induced by visuo-tactile stimulation without traditional navigation, could trigger grid cell-like representations in the brain.
- The study found that these perceived changes in self-location can activate grid cell-like activity in a manner similar to traditional navigation, suggesting that our brain uses similar mechanisms for both sensory cues and body perception when determining location.
The Moon illusion explained by the projective consciousness model.
J Theor Biol
December 2020
Department of Philosophy and Humanities, University of Texas, Arlington, USA.
Models of consciousness should account for the phenomenology of subjective experience, including perceptual illusions. The Moon Illusion is a paradigmatic example that has yet to be accounted for. The Moon often appears larger near the perceptual horizon and smaller high in the sky, though the visual angle subtended is invariant.
View Article and Find Full Text PDFThe Sun/Moon Illusion in a Medieval Irish Astronomical Tract.
Vision (Basel)
August 2019
Psychology, University of Stirling, Stirling FK9 4LA, UK.
The Irish Astronomical Tract is a 14th-15th century Gaelic document, based mainly on a Latin translation of the eighth-century Jewish astronomer Messahala. It contains a passage about the sun illusion-the apparent enlargement of celestial bodies when near the horizon compared to higher in the sky. This passage occurs in a chapter concerned with proving that the Earth is a globe rather than flat.
View Article and Find Full Text PDFThe Moon Illusion as (Partly) an Error in Apparent Visual Angle: A New Possibility.
Perception
November 2019
Department of Psychology, University of California, Davis, CA, USA.
The moon size illusion does not improve perceptual judgments.
Conscious Cogn
August 2019
Centre de Recherche Cerveau et Cognition (CerCo), Centre National de la Recherche Scientifique (CNRS), Université Paul Sabatier, Toulouse, France; Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Psychological Sciences, Purdue University, 703 Third Street, West Lafayette, IN 47907-2004, USA.
Recent studies suggest that the accuracy of perceptual judgments can be influenced by the perceived illusory size of a stimulus, with judgments being more accurate for increased illusory size. This phenomenon seems consistent with recent neuroscientific findings that representations in early visual areas reflect the perceived (illusory) size of stimuli rather than the physical size. We further explored this idea with the moon illusion, in which the moon appears larger when it is close to the horizon and smaller when it is higher in the sky.
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