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Vision

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.

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Related Experiment Video

Updated: Dec 18, 2025

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

Published on: February 20, 2014

Cue-triggered activity replay in human early visual cortex.

Junshi Lu^1,2, Lu Luo^1,2, Qian Wang^1,3

¹School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, China.

Science China. Life Sciences

|June 20, 2020

Summary

This summary is machine-generated.

Learned visual sequences can be recalled by a cue, triggering neural reactivation in the human visual cortex. This experience-based plasticity involves a faster, compressed neural response along the motion path.

Keywords:

neural plasticity replay sEEG visual cortex

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Area of Science:

Neuroscience
Visual Neuroscience
Cognitive Neuroscience

Background:

Experience-based neural plasticity underlies memory and learning.
The recall of learned temporal sequences is a key aspect of this plasticity.
Visual cues can trigger reactivation of previously learned patterns in the brain.

Purpose of the Study:

To investigate the neural mechanisms of recalling learned temporal sequences in the human visual cortex.
To observe experience-based neural plasticity in response to visual cues.
To characterize the properties of cue-induced neural reactivation.

Main Methods:

Intracranial recording in awake human subjects.
Presenting a moving dot stimulus followed by a visual cue (flash).
Analyzing neural activity in the visual cortex along the motion path.

Main Results:

A flash cue triggered neural reactivation in the downstream receptive field after repeated exposure to a moving dot.
Reactivation occurred only when the cue was presented near the receptive field.
The estimated speed of cue-induced reactivation was faster than that of real motion.

Conclusions:

Repeated visual exposure induces a range-limited, time-compressed neural reactivation in the awake human visual cortex.
This reactivation is triggered by a cue and follows learned temporal sequences.
Findings suggest a novel form of neural plasticity for rapid sequence recall.