Related Experiment Video
Updated: May 21, 2026
12:12
Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
Published on: May 14, 2014
The Role of Competitive Inhibition and Top-Down Feedback in Binding during Object Recognition
Dean Wyatte1, Seth Herd, Brian Mingus
1Department of Psychology and Neuroscience, University of Colorado Boulder Boulder, CO, USA.
Frontiers in Psychology
|June 22, 2012
Summary
The brain solves the binding problem by using neural inhibition and top-down feedback to create competition, ensuring only relevant visual features are unified for object recognition. This approach avoids specialized binding mechanisms.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Vision Science
Background:
- The brain must integrate visual features processed by distinct neurons into a coherent perception for tasks like object recognition.
- Understanding the neural mechanisms underlying this integration, known as the binding problem, is crucial for cognitive neuroscience.
Purpose of the Study:
- To propose and demonstrate a solution to the brain's binding problem using fundamental neural processing principles.
- To investigate the roles of neural inhibition and top-down feedback in visual feature binding.
Main Methods:
- Development of a biologically realistic neural model of vision.
- Simulation of neural processing across a hierarchy of interconnected brain areas.
- Analysis of the model's ability to bind visual features and suppress irrelevant information.
Main Results:
- Neural inhibition effectively suppresses irrelevant features by creating competition among neural populations.
- Top-down feedback reinforces relevant features, contributing to the binding process.
- The model successfully demonstrated how inhibition and feedback solve the binding problem without specific binding mechanisms.
Conclusions:
- The binding problem can be solved through the interplay of neural inhibition and top-down feedback, creating a competitive neural environment.
- Temporal synchrony plays a supportive, rather than primary, role in binding by enhancing feature contrast.
- This theory offers a parsimonious explanation for visual binding based on general neural principles.
Related Concept Videos
00:46Feedback Inhibition
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
02:34Enzymes
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
01:29The Two-State Receptor Model
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with one...
The binding affinity of a drug determines its interaction with one...
01:30Enzyme Inhibition
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
01:58Cooperative Allosteric Transitions
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
00:49Ligand Binding and Linkage
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence the...