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Docosahexaenoic Acid Explains the Unexplained in Visual Transduction.

Michael A Crawford¹, Andrew J Sinclair^2,3, Yiqun Wang¹

¹Institute of Brain Chemistry and Human Nutrition, Imperial College, London SW10 9NH, UK.

Entropy (Basel, Switzerland)

|November 24, 2023

Summary

This summary is machine-generated.

Docosahexaenoic acid (DHA) may explain how the eye rapidly processes light. This omega-3 fatty acid traps photon energy, enabling fast visual signal transmission to the brain for image creation.

Keywords:

di-DHA phosphatidylcholine docosahexaenoic docosapentaenoic essential fatty acids hexatriaconta-hexaenoic membrane non-classicality quantum-field retina rhodopsin vision waveform π-electrons

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Area of Science:

Biochemistry
Neuroscience
Ophthalmology

Background:

George Wald's Nobel Prize-winning work highlighted unexplained speed limitations in visual reception.
Rhodopsin activation alone is insufficient to account for the rapid physiological and chemical visual processes.
Photoreceptor membranes are rich in docosahexaenoic acid (DHA), an omega-3 fatty acid.

Purpose of the Study:

To propose a revised model for visual processing that addresses the speed of information transfer.
To explain how the energy and wavelength of a photon are conserved during visual reception.
To elucidate the specific role of DHA in the visual process.

Main Methods:

The study is primarily theoretical, proposing a hypothesis based on existing biochemical and physiological knowledge.
It analyzes the energy dynamics of retinal cis-trans isomerization following photon absorption.
It integrates the known properties of DHA within the context of visual signal transduction.

Main Results:

The hypothesis posits that DHA traps energy released during cis-trans isomerization of retinal.
This energy trapping leads to hyperpolarization and extraction of an energized electron.
The energized electron depolarizes the membrane, transmitting a signal encoding photon energy to the brain.

Conclusions:

DHA's role in trapping photon energy offers a potential explanation for the speed of visual reception.
This mechanism accounts for the conservation of photon wavelength information.
The findings underscore the indispensable role of DHA in the visual system and conscious image formation.