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Related Concept Videos

Vision01:24

Vision

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.
Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
Color Vision01:24

Color Vision

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.
Visual System01:26

Visual System

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...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.

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Related Experiment Video

Updated: Jun 6, 2026

Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus
05:01

Inducing Long-Term Plasticity of Intrinsic Neuronal Excitability in Neurons of the Dorsal Lateral Geniculate Nucleus

Published on: September 20, 2024

Visual experience induces long-term potentiation in the primary visual cortex.

Sam F Cooke1, Mark F Bear

  • 1The Picower Institute for Learning and Memory, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|December 3, 2010
PubMed
Summary
This summary is machine-generated.

Stimulus-specific response potentiation (SRP) in the visual cortex is mediated by the same mechanisms as long-term potentiation (LTP). This finding suggests LTP can be used to enhance vision.

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Last Updated: Jun 6, 2026

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

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Area of Science:

  • Neuroscience
  • Visual System Plasticity
  • Synaptic Plasticity

Background:

  • Stimulus-specific response potentiation (SRP) is a form of experience-dependent plasticity in the primary visual cortex.
  • Repeated visual stimuli in awake mice increase visual evoked potential (VEP) amplitude in a stimulus-specific manner.

Purpose of the Study:

  • To determine if thalamocortical long-term potentiation (LTP) mechanisms can explain SRP.
  • To investigate the relationship between SRP and LTP in the visual cortex.

Main Methods:

  • Induced LTP in the dorsal lateral geniculate nucleus using theta burst stimulation (TBS).
  • Recorded VEPs in layer 4 of the visual cortex.
  • Administered a peptide inhibiting PKMζ via local cortical infusion.

Main Results:

  • LTP enhanced VEP amplitude but generalized across stimuli, unlike SRP.
  • LTP occluded subsequent SRP expression.
  • SRP occluded TBS-induced LTP for experienced stimuli but not novel ones.
  • PKMζ inhibition rapidly and selectively reversed SRP.

Conclusions:

  • SRP and LTP share common underlying mechanisms in the visual cortex.
  • SRP can serve as an assay for assessing LTP integrity in vivo.
  • LTP in the visual cortex may hold potential for vision improvement.