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

Perpendicular-Axis Theorem01:16

Perpendicular-Axis Theorem

4.6K
The perpendicular-axis theorem states that the moment of inertia of a planar object about an axis perpendicular to its plane is equal to the sum of the moments of inertia about two mutually perpendicular concurrent axes lying in the plane of the body.
Consider a circular disc of mass M and radius R lying along an x-y plane. The origin lies at the center of the disc, and the z-axis is perpendicular to the disc's plane. All three axes coincide at the disc's center. The moment of inertia of this...
4.6K
Topographic Surveying and Contours01:29

Topographic Surveying and Contours

953
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
953
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

987
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
987
Parallel Resonance01:23

Parallel Resonance

559
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
559
Parallel Processing01:20

Parallel Processing

719
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
719
Work Done Over an Inclined Plane01:11

Work Done Over an Inclined Plane

4.0K
The center-of-mass framework helps to easily describe the work done on rigid bodies. Since the internal forces in a rigid body do no work, they can be ignored, and the external forces can be considered in the work-energy theorem.
The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
4.0K

You might also read

Related Articles

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

Sort by
Same author

<i>In vivo</i> modulation of locus coeruleus activity by light.

bioRxiv : the preprint server for biology·2026
Same author

Age-Related Differences in the Association between REM Sleep and the Polygenic Risk for Parkinson's Disease.

Annals of neurology·2025
Same author

The Crosstalk Between the Anterior Hypothalamus and the Locus Coeruleus During Wakefulness Is Associated with Low-Frequency Oscillations Power During Sleep.

Clocks & sleep·2025
Same author

REM sleep quality is associated with balanced tonic activity of the locus coeruleus during wakefulness.

Journal of biomedical science·2025
Same author

Regional response to light illuminance across the human hypothalamus.

eLife·2024
Same author

The Ames room and the misunderstood versions and depictions.

Perception·2024
Same journal

Computational and mathematical models in vision: Quantitative approaches to understanding visual perception.

Vision research·2026
Same journal

Complex interactions between lightness, chroma, and hue in color ensemble perception.

Vision research·2026
Same journal

Driving with autism spectrum disorder: Exploring the impact of tactile hazard warnings on gaze behavior and hazard responses.

Vision research·2026
Same journal

Early visual processing in adults with ADHD: evidence from contrast sensitivity, spatial integration, and external noise.

Vision research·2026
Same journal

Pupil reflexes generate the peripheral drift illusion due to ON/OFF motion responses.

Vision research·2026
Same journal

Perceived direction of glass patterns can flip by 90°: A neural model.

Vision research·2026
See all related articles

Related Experiment Video

Updated: Feb 2, 2026

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
08:46

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Published on: January 15, 2014

9.6K

Perceiving perpendicular and parallel contours in the frontoparallel plane.

Ekaterina Koshmanova1, Tadamasa Sawada1

  • 1School of Psychology, National Research University Higher School of Economics, Russian Federation.

Vision Research
|November 24, 2018
PubMed
Summary
This summary is machine-generated.

Visual perception of contour relationships, like perpendicular junctions and parallel lines, is key. Our study quantifies this, finding the visual system uniquely sensitive to these configurations.

Keywords:
Angle discriminationContour configurationMethod of Constant StimuliOrientation discriminationOrientation thresholdParallelismPerpendicularity

More Related Videos

Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
11:23

Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients

Published on: February 23, 2017

14.7K
Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

11.2K

Related Experiment Videos

Last Updated: Feb 2, 2026

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
08:46

Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity

Published on: January 15, 2014

9.6K
Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
11:23

Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients

Published on: February 23, 2017

14.7K
Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

11.2K

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Psychophysics

Background:

  • Contour perception is complex and not merely additive.
  • The relationship between contours significantly influences visual perception.
  • Quantitative comparison of contour configurations has been challenging.

Purpose of the Study:

  • To quantitatively compare the perception of different contour configurations.
  • To investigate the visual system's sensitivity to contour relationships.
  • To determine if specific configurations like perpendicular junctions or parallel contours affect perception thresholds.

Main Methods:

  • Conducted three psychophysical experiments.
  • Measured orientation thresholds of single contours within configurations.
  • Employed a modified Method of Constant Stimuli assuming linear integration of contours.

Main Results:

  • Quantitative comparison of perceived configurations was achieved.
  • Thresholds for perpendicular junctions were significantly lower than for single or non-perpendicular contours.
  • Parallel contours yielded the lowest orientation thresholds.

Conclusions:

  • The visual system demonstrates heightened sensitivity to perpendicular junctions.
  • Parallel contours are perceived with exceptional ease, indicated by the lowest thresholds.
  • Contour relationships, not just individual contours, are critical for visual processing.