Related Experiment Video
Updated: Jul 27, 2025
08:42
Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
Published on: August 4, 2018
14.2K
Information Geometry of the Retinal Representation Manifold
Xuehao Ding1, Dongsoo Lee2, Joshua B Melander2
1Department of Applied Physics, Stanford University.
Biorxiv : the Preprint Server for Biology
|June 9, 2023
Summary
This study introduces a new framework using information geometry to understand how the brain discriminates visual stimuli. Findings suggest retinal noise correlations limit information transmission, contrary to prior speculation.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Visual System
Background:
- Visual discriminability is limited by retinal representations.
- Previous studies used artificial stimuli or lacked realistic encoding models.
Approach:
- Developed a novel framework using information geometry for stimulus discriminability.
- Created a stochastic encoding model of retinal ganglion cells using a convolutional neural network.
- Computed the Fisher information metric to identify the most discriminable stimulus directions.
Key Points:
- The most discriminable stimulus direction varies significantly across different stimuli.
- The most discriminative neural response mode often aligns with the most stochastic mode.
- Retinal noise correlations appear to limit, rather than enhance, information transmission under natural scenes.
Conclusions:
- Population coding in the retina benefits from complementary coding under natural scenes.
- Population coding helps equalize information across different firing rates, aiding stimulus decoding.
- Sensitivity saturation is reduced in neural populations compared to single cells.
Related Concept Videos
01:20Anatomy of the Eyeball
7.2K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.2K
01:24Vision
53.6K
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.
53.6K
01:32The Retina
69.2K
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
69.2K
02:18Fischer Projections
13.5K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines.
13.5K
01:26Visual System
627
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...
Once through the pupil, the light passes through the lens, a...
627
01:10Vector Algebra: Graphical Method
12.5K
Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
12.5K