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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.
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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Computational Modeling of Retinal Neurons for Visual Prosthesis Research - Fundamental Approaches
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Computational Modeling of Retinal Neurons for Visual Prosthesis Research - Fundamental Approaches

Published on: June 21, 2022

Toward the development of a cortically based visual neuroprosthesis.

Richard A Normann1, Bradley Greger, Bradley A Greger

  • 1Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA.

Journal of Neural Engineering
|May 22, 2009
PubMed
Summary
This summary is machine-generated.

Researchers aim to restore vision in blind patients using a visual neuroprosthesis connected to the occipital cortex. This involves addressing challenges and conducting psychophysical research for effective microelectrode stimulation patterns.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Ophthalmology

Background:

  • Cochlear implants have restored hearing.
  • Profound blindness presents a significant unmet medical need.
  • Developing brain-computer interfaces is advancing rapidly.

Purpose of the Study:

  • To explore the feasibility of a visual neuroprosthesis for the occipital cortex.
  • To identify key challenges in creating a cortical visual prosthesis.
  • To highlight the necessity of psychophysical research for effective visual stimulation.

Main Methods:

  • Review of current neuroprosthetic approaches.
  • Identification of challenges in cortical stimulation.
  • Emphasis on human psychophysical research methodologies.

Main Results:

  • The development of a visual neuroprosthesis faces significant challenges.
  • Understanding optimal stimulation patterns for the occipital cortex is crucial.
  • Psychophysical research is essential for guiding device design.

Conclusions:

  • A visual neuroprosthesis interfacing with the occipital cortex is a potential future treatment for blindness.
  • Further research is needed to overcome technical and psychophysical hurdles.
  • The goal is to develop design specifications for a first-generation cortical visual prosthesis.