Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Visual physiology: perceived size looms large.

Sean P MacEvoy1, David Fitzpatrick

  • 1Department of Neurobiology, Duke University Medical Center, Box 3209, Durham, North Carolina 27710, USA. macevoy@neuro.duke.edu

Current Biology : CB
|May 10, 2006
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Between the ambulance and academia: rethinking identity and competence in paramedics with reduced clinical exposure.

British paramedic journal·2026
Same author

Development of coherent cortical responses reflects increased discriminability of feedforward inputs and their alignment with recurrent circuits.

Neuron·2025
Same author

Retinal waves reveal axial biases in modular patterns of cortical activity that predict future orientation preferences.

bioRxiv : the preprint server for biology·2025
Same author

Systematic Review and Meta-Analysis on the Prevalence of Radiotherapy-Induced Hypopituitarism in Adults With Primary Non-Pituitary Brain Tumours.

Clinical endocrinology·2025
Same author

Outcomes following stereotactic radiosurgery for high-grade brain arteriovenous malformations: a systematic review and meta-analysis.

Journal of neurosurgery·2025
Same author

The developmental emergence of reliable cortical representations.

Nature neuroscience·2025
Same journal

Increased rates of hybridization in swordtails are associated with water pollution.

Current biology : CB·2026
Same journal

Visual uncertainty and task demands shape active sensing strategies in mice.

Current biology : CB·2026
Same journal

An adaptable, self-organizing, single-cell morphology circuit optimizes suctorian predatory trap structure.

Current biology : CB·2026
Same journal

Temporal tuning of switch-like virulence expression resolves environmental uncertainty through phenotypic heterogeneity.

Current biology : CB·2026
Same journal

An abstract relational map emerges in the human medial prefrontal cortex with consolidation.

Current biology : CB·2026
Same journal

Phloem evolved gradually and asynchronously to xylem in early vascular plants.

Current biology : CB·2026
See all related articles

Size perception relies on context, but new research reveals that the primary visual cortex, not just higher brain areas, processes perceived size. This finding challenges previous assumptions about visual processing hierarchies.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Brain Imaging

Background:

  • Size perception is influenced by contextual cues.
  • These cues were previously thought to be processed in higher visual areas.
  • The exact neural mechanisms remain under investigation.

Purpose of the Study:

  • To investigate the role of the primary visual cortex in size perception.
  • To determine if early visual processing areas contribute to contextual size illusions.
  • To challenge the notion that only high-level visual areas process complex contextual information.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) to measure brain activity.
  • Presented participants with visual stimuli designed to elicit size illusions.

Related Experiment Videos

  • Analyzed neural activity patterns in response to varying contextual cues.

    • Main Results:

    • Activity in the primary visual cortex (V1) significantly correlated with perceived size.
    • Neural responses in V1 reflected the influence of contextual cues on size perception.
    • Evidence suggests early visual areas play a direct role in constructing perceived size.

    Conclusions:

    • Perceived size is not solely determined by high-level visual processing.
    • The primary visual cortex is involved in processing contextual information for size perception.
    • This challenges existing models of the visual processing hierarchy.