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Related Concept Videos

Vision01:24

Vision

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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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Visual System01:26

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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.
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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Higher Mental Functions of the Brain: Language01:10

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Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
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Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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The Language of Vision.

Patrick Cavanagh1,2,3

  • 1York University, Canada.

Perception
|February 15, 2021
PubMed
Summary
This summary is machine-generated.

The brain processes visual information into a compressed "visual language" for other centers like memory and language. This visual language may have grammar rules, similar to spoken language, acquired from the environment.

Keywords:
Perceptionattentionlanguageshapes/objectsspatial cognition

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Area of Science:

  • Cognitive Neuroscience
  • Computational Neuroscience
  • Linguistics

Background:

  • Visual processing generates complex descriptions of scenes.
  • These descriptions must be communicated to non-visual brain centers (e.g., memory, language, planning).
  • Transmitting raw visual data is inefficient, necessitating a compressed format.

Purpose of the Study:

  • To explore the concept of a "visual language" used for inter-center communication.
  • To investigate the potential grammatical structures within this visual language.
  • To consider the environmental acquisition of visual language grammar and its relation to spoken language.

Main Methods:

  • Analysis of visual processing outputs.
  • Identification of grammatical components analogous to "nouns," "verbs," and "prepositions" in visual scenes.
  • Examination of recursion and errors in visual grammar patterns.

Main Results:

  • Evidence suggests visual processing involves distinct components akin to parts of speech.
  • The study identifies potential recursive structures and grammatical errors in visual representations.
  • The possibility of a shared or adapted grammar acquisition mechanism for visual and spoken language is raised.

Conclusions:

  • Visual information is likely encoded in a structured "visual language" for broader brain use.
  • This visual language may possess grammatical rules, influencing how information is processed and transmitted.
  • Understanding visual language grammar could offer insights into language evolution and acquisition.