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 Concept Videos

Synesthesia01:27

Synesthesia

803
Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
803
Color Vision01:24

Color Vision

1.8K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.8K
Visual Agnosia01:12

Visual Agnosia

1.5K
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
1.5K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

10.4K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
10.4K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

11.0K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
11.0K
Vision01:24

Vision

60.9K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
60.9K

You might also read

Related Articles

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

Sort by
Same author

Forecasting brain activity based on models of spatiotemporal brain dynamics: A comparison of graph neural network architectures.

Network neuroscience (Cambridge, Mass.)·2023
Same author

A graph neural network framework for causal inference in brain networks.

Scientific reports·2021
Same author

Hybridizing EMD with cICA for fMRI Analysis of Patient Groups.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2020
Same author

Spurious correlations in simultaneous EEG-fMRI driven by in-scanner movement.

NeuroImage·2016
Same author

Juggling revisited - a voxel-based morphometry study with expert jugglers.

NeuroImage·2014
Same author

Neural correlates of saccadic inhibition in healthy elderly and patients with amnestic mild cognitive impairment.

Frontiers in psychology·2013

Related Experiment Video

Updated: Mar 6, 2026

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

23.5K

Do graphemes attract spatial attention in grapheme-color synesthesia?

G Volberg1, A S Chockley2, M W Greenlee1

  • 1Institute for Psychology, University of Regensburg, Germany.

Neuropsychologia
|March 7, 2017
PubMed
Summary

Grapheme-color synesthetes show increased brain activity in response to specific graphemes. However, these graphemes do not automatically attract spatial attention, challenging previous hypotheses.

Keywords:
AttentionColorEEGGraphemeSynesthesia

More Related Videos

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
05:58

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

9.4K
Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

9.7K

Related Experiment Videos

Last Updated: Mar 6, 2026

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

23.5K
Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
05:58

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

9.4K
Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

9.7K

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Sensory Perception

Background:

  • Grapheme-color synesthesia involves experiencing colors with achromatic graphemes.
  • The role of spatial attention in synesthetic perception remains unclear.

Purpose of the Study:

  • To investigate if grapheme inducers automatically attract spatial attention in synesthetes.
  • To explore the neural mechanisms underlying synesthetic color experience.

Main Methods:

  • Electroencephalography (EEG) was used to record oscillatory responses.
  • Participants judged Gabor patch orientation after viewing achromatic inducers or colored non-inducers.
  • Stimuli were presented in either the left or right visual hemifield.

Main Results:

  • Synesthetes exhibited an early theta power increase for right-sided inducers, originating from the left fusiform gyrus.
  • No alpha power asymmetries, suggesting no shift in spatial attention, were found.
  • Synesthetes demonstrated heightened responsiveness in grapheme processing areas to inducers.

Conclusions:

  • Synesthetic grapheme processing areas are more responsive in synesthetes.
  • Contrary to the hypothesis, inducers did not automatically attract spatial attention in synesthetes.