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Related Concept Videos

Visual System01:26

Visual System

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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.
Once through the pupil, the light passes through the lens, a...
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Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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
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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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Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

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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.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
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Association Areas of the Cortex01:21

Association Areas of the Cortex

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Related Experiment Video

Updated: May 23, 2025

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
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Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology

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Object knowledge representation in the human visual cortex requires a connection with the language system.

Bo Liu1,2,3,4, Xiaosha Wang1, Xiaoying Wang1

  • 1State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, China.

Plos Biology
|May 20, 2025
PubMed
Summary
This summary is machine-generated.

The brain

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Neuropsychology

Background:

  • Understanding how the human brain stores world knowledge is a key cognitive neuroscience question.
  • Object knowledge is often found in higher-order sensory areas, but the language system's role is debated.
  • Investigating object color knowledge provides a test case for the language system's necessity in neural representation.

Purpose of the Study:

  • To determine if communication with the language system is essential for neural representation of object knowledge in the visual cortex.
  • To examine the impact of the vision-language connection on object knowledge behaviors.
  • To elucidate the role of the language-sensory system interface in knowledge representation.

Main Methods:

  • Combined diffusion imaging, functional MRI (fMRI), and neuropsychological assessments in stroke patients (N=33).
  • Measured white-matter structural integrity, functional neural representation, and behavioral integrity.
  • Analyzed lesions in left, right, or bilateral hemispheres.

Main Results:

  • Loss of white-matter integrity between the anterior temporal language region and ventral visual cortex significantly impacted object color knowledge representation.
  • This structural damage also affected object color knowledge behavior across modalities.
  • Findings were independent of early visual perception pathways and confounding cognitive variables.

Conclusions:

  • The vision-language connection in the ventral occipitotemporal cortex (VOTC) is crucial for object knowledge neural representation.
  • This connection also plays a significant role in object knowledge behaviors.
  • The study highlights the importance of the language-sensory system interface for storing world knowledge.