Related Experiment Video
Updated: Jun 18, 2025
09:48
Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
Published on: September 11, 2017
9.9K
Recurrent inhibition refines mental templates to optimize perceptual decisions
Ke Jia1,2,3,4, Mengxin Wang4, Cecilia Steinwurzel4
1Affiliated Mental Health Center and Hangzhou Seventh People's Hospital, Zhejiang University School of Medicine, Hangzhou 310013, China.
Science Advances
|July 31, 2024
Summary
Learning to make better decisions involves refining internal brain templates. This study shows that increased inhibitory signals in the visual cortex, driven by experience, enhance these templates for improved perceptual decision-making.
Area of Science:
- Neuroscience
- Cognitive Science
- Computational Neuroscience
Background:
- Perceptual decision-making requires internal representations of task-relevant features.
- The brain mechanisms for forming these feature representations, or mental templates, remain unclear.
- Experience-dependent plasticity is crucial for optimizing cognitive functions.
Purpose of the Study:
- To investigate the role of recurrent inhibition in refining mental templates for perceptual decisions.
- To explore experience-dependent plasticity in superficial visual cortex layers.
- To elucidate the interplay between functional and neurochemical changes during learning.
Main Methods:
- Utilized ultrahigh-field (7 Tesla) functional magnetic resonance imaging (fMRI) at submillimeter resolution.
- Employed magnetic resonance spectroscopy (MRS) to assess neurochemical changes.
- Combined fMRI and MRS to investigate plasticity in visual cortex during a fine orientation discrimination task.
Main Results:
- GABAergic inhibition significantly increased after training on the visual discrimination task.
- This increase in inhibition enhanced the discriminability of orientation representations.
- Recurrent processing in superficial visual cortex layers was found to be modulated by training.
Conclusions:
- Recurrent inhibition is an experience-dependent plasticity mechanism that refines mental templates.
- Enhanced GABAergic inhibition and recurrent processing optimize brain computations for perceptual decisions.
- This mechanism contributes to adaptive behavior and improved task performance.
More Related Videos
Related Concept Videos
01:28Perception
445
Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
445
01:15Subliminal Perception
247
Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
247
01:16Interference and Decay
121
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
121
01:20Parallel Processing
149
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...
149
01:24Vision
53.1K
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.
53.1K
01:01Neuroplasticity
320
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.
320