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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 Memory01:18

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
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.
Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
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...
Sensory Memory01:14

Sensory Memory

Sensory memory captures information from the environment in its original form for a very brief duration, just long enough to be exposed to visual, auditory, and other senses. This type of memory is detailed and rich but quickly lost unless certain strategies are employed to transfer it into short-term or long-term memory. Sensory information is continuously bombarding the human brain, yet only a small fraction is absorbed, as most of it does not significantly impact daily life. For instance,...

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Related Experiment Video

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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
07:11

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Visual short-term memory: activity supporting encoding and maintenance in retinotopic visual cortex.

Markus H Sneve1, Dag Alnæs, Tor Endestad

  • 1Center for the Study of Human Cognition, Department of Psychology, University of Oslo, Norway. m.h.sneve@psykologi.uio.no

Neuroimage
|July 11, 2012
PubMed
Summary
This summary is machine-generated.

This study reveals how the brain encodes visual information for short-term memory. Intermediate visual cortex areas are crucial for memory encoding, with active maintenance supporting memory traces.

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Last Updated: May 20, 2026

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Retinotopic cortex retains visual information during memory retention intervals.
  • The transformation of sensory responses into memory representations remains unclear.

Purpose of the Study:

  • Investigate the neural mechanisms of visual short-term memory encoding.
  • Identify specific retinotopic areas involved in memory encoding.
  • Understand how visual features are transformed into memory traces.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) with univariate and multivariate analyses.
  • Short-term visual memory tasks.
  • Pattern classification techniques to analyze representational content.

Main Results:

  • All visual areas showed reduced responses when memory encoding was interrupted, potentially originating from primary visual cortex (V1).
  • Intermediate visual areas (dorsal V3a/b, ventral LO1/2) were more active during memory encoding than during non-memory processing.
  • These findings held for different visual features (orientation and spatial frequency), suggesting higher-level encoding.
  • Active maintenance, not just initiation, was necessary for memory-specific patterns in retinotopic cortex during delay periods.

Conclusions:

  • Intermediate visual cortex plays a key role in visual memory encoding.
  • Active maintenance is essential for forming enduring memory traces in the retinotopic cortex.
  • The findings provide insights into the neural basis of visual short-term memory.