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Sensory representations in primary visual cortex are not sufficient for subjective imagery.
Curr Biol
November 2024
School of Psychology, University of Sussex, Brighton BN1 9QH, UK; Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9RH, UK.
Article Synopsis
- The modern concept of mental imagery involves sensory representations that mimic perception without being derived from it, along with a personal experience tied to that imagery.
- Neuroimaging studies reveal that these sensory representations occur in the primary visual cortex (V1) and display similarities to actual perception.
- Research comparing individuals who can visualize (visualizers) and those who cannot (aphantasics) found that while V1 can still decode sound content in aphantasics during passive listening, it fails during voluntary imagery, indicating a distinction between sensory representations and subjective experiences.
A Systematic Review of Aphantasia: Concept, Measurement, Neural Basis, and Theory Development.
Vision (Basel)
September 2024
Applied Psychology Program, Department of Life Sciences, BNU-HKBU United International College, Zhuhai 519087, China.
People with aphantasia exhibit the inability to voluntarily generate or form mental imagery in their minds. Since the term "aphantasia" was proposed to describe this, it has gained increasing attention from psychiatrists, neuroscientists, and clinicians. Previous studies have mainly focused on the definition, prevalence, and measurement of aphantasia, its impacts on individuals' cognitive and emotional processing, and theoretical frameworks synthesizing existing findings, which have contributed greatly to our understanding of aphantasia.
View Article and Find Full Text PDFProposal for a consistent definition of aphantasia and hyperphantasia: A response to Lambert and Sibley (2022) and Simner and Dance (2022).
Cortex
July 2022
Cognitive Neurology Research Group, University of Exeter Medical School, Exeter, UK.
Attention driven phantom vision: measuring the sensory strength of attentional templates and their relation to visual mental imagery and aphantasia.
Philos Trans R Soc Lond B Biol Sci
February 2021
School of Psychology, The University of New South Wales, Sydney, Australia.
When we search for an object in an array or anticipate attending to a future object, we create an 'attentional template' of the object. The definitions of attentional templates and visual imagery share many similarities as well as many of the same neural characteristics. However, the phenomenology of these attentional templates and their neural similarities to visual imagery and perception are rarely, if ever discussed.
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