Related Experiment Video
Updated: Sep 12, 2025
04:43
Visualizing Visual Adaptation
Published on: April 24, 2017
9.1K
Aversively conditioned context enhances visual size illusion via stimulus-specific neural networks
Jialin Zhu1,2, Yi Yang1,2, Lihong Chen1,2
1Institute of Psychological and Brain Sciences, Liaoning Normal University, Dalian 116029, China.
Iscience
|August 8, 2025
Summary
Aversive learning enhances visual perception, altering brain connectivity. Fear conditioning, using electric shock or noise with the Ebbinghaus illusion, impacts perceived size and neural pathways.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psychology
Background:
- Emotion-perception interaction is crucial but poorly understood.
- Neural mechanisms linking emotion and perception require elucidation.
Purpose of the Study:
- To investigate how aversive learning influences visual perception.
- To identify neural pathways mediating emotion-perception interactions.
Main Methods:
- Combined fear conditioning (electric shock, noise) with the Ebbinghaus illusion.
- Measured behavioral responses (perceived size) and neural activity (fMRI).
Main Results:
- Aversive contexts amplified the Ebbinghaus illusion effect.
- Shock conditioning strengthened occipital-parietal connectivity; noise conditioning enhanced prefrontal-parietal connectivity.
- Noise conditioning increased lateral amygdala (LA) and dorsolateral prefrontal cortex (dlPFC) activation, weakening LA-dlPFC connectivity.
Conclusions:
- Aversive learning shapes visual perception via stimulus-specific neural networks.
- Findings advance understanding of emotion-perception interaction.
- Provides insights for clinical interventions targeting fear-related perceptual distortions.
Keywords:
Cognitive neuroscience
Related Concept Videos
01:26Visual System
689
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
689
01:24Vision
55.3K
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.
55.3K
01:15Depth Perception and Spatial Vision
913
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
913
01:01Neuroplasticity
765
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
765
01:15Real-World Application of Classical Conditioning
734
Classical conditioning not only includes the initial pairing of stimuli but also extends to more complex forms, such as higher-order conditioning. Higher-order conditioning involves creating associations beyond the primary conditioned stimulus, resulting in a chain of conditioned responses.
Higher-order, or second-order, conditioning occurs when a neutral stimulus becomes associated with an already established conditioned stimulus through repeated pairings. For instance, if a dog has been...
Higher-order, or second-order, conditioning occurs when a neutral stimulus becomes associated with an already established conditioned stimulus through repeated pairings. For instance, if a dog has been...
734
01:21Gestalt Principles of Perception
444
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
444