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

Conscious visual perception without V1

J L Barbur1, J D Watson, R S Frackowiak

  • 1Department of Optometry and Visual Science, City University, London, UK.

Brain : a Journal of Neurology
|December 1, 1993
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

Anomalous Nematic States in High Half-Filled Landau Levels.

Physical review letters·2020
Same author

Colour vision requirements in visually demanding occupations.

British medical bulletin·2017
Same author

Electron-Hole Asymmetric Chiral Breakdown of Reentrant Quantum Hall States.

Physical review letters·2016
Same author

Optical Emission Spectroscopy Study of Competing Phases of Electrons in the Second Landau Level.

Physical review letters·2016
Same author

T-cell ontogeny: the role of a stimulator - suppressor cell.

Immunology today·2014
Same author

Interleukin 3 and colony-stimulating factors.

Immunology today·2014
Same journal

Disrupted WWOX-MYC interplay impairs neurogenesis in human brain organoids.

Brain : a journal of neurology·2026
Same journal

SMPD4 deficiency disrupts indirect neurogenesis and neuronal migration in gyrencephalic cortex.

Brain : a journal of neurology·2026
Same journal

Retinal hyper-reflective foci link retinal and cortical pathology in paediatric multiple sclerosis.

Brain : a journal of neurology·2026
Same journal

Two scripts, two pathways: dorsal-ventral biases in post-stroke kana-kanji agraphia.

Brain : a journal of neurology·2026
Same journal

Blood cytotoxic natural killer-like CD8 + CD94+ T cells migrate to the brain and predict multiple sclerosis severity.

Brain : a journal of neurology·2026
Same journal

Time to reconsider risk for psychosis?

Brain : a journal of neurology·2026
See all related articles

Visual signals can reach motion-processing area V5 even without passing through visual area V1. This pathway is sufficient for conscious visual perception and motion discrimination in patients with V1 lesions.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Neuroimaging

Background:

  • Visual area V1 is traditionally considered the first cortical stop for visual information.
  • Area V5 is specialized for processing visual motion.
  • The role of V1 in conscious visual awareness is debated.

Observation:

  • PET scans were used to monitor brain activity in a patient with a V1 lesion.
  • The patient could discriminate visual motion direction and report conscious awareness of stimuli.
  • Area V5 showed activation during the task, but V1 did not.

Findings:

  • Visual input can reach area V5 independently of area V1.
  • Activation of V5 correlates with conscious perception of motion direction.
  • The V1-independent pathway supports motion discrimination and awareness.

Related Experiment Videos

Implications:

  • Challenges the necessity of V1 for all visual processing and conscious awareness.
  • Suggests alternative routes for visual information processing in the brain.
  • Provides insights into visual recovery and plasticity after brain injury.