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Related Concept Videos

Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

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...
Language and Cognition01:27

Language and Cognition

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.
Association Areas of the Cortex01:21

Association Areas of the Cortex

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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
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Perceiving Loudness, Pitch, and Location01:21

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Related Experiment Video

Updated: Jun 13, 2026

Interaction between Phonological and Semantic Processes in Visual Word Recognition using Electrophysiology
05:38

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

Published on: June 29, 2021

Localizing the Frequency x Regularity word reading interaction in the cerebral cortex.

Jacqueline Cummine1, Gordon E Sarty, Ron Borowsky

  • 1Department of Speech Pathology and Audiology, University of Alberta, Edmonton, AB T6G 2G4, Canada. jcummine@ualberta.ca

Neuropsychologia
|April 14, 2010
PubMed
Summary

This study used behavioral and functional magnetic resonance imaging (fMRI) to locate the Frequency x Regularity interaction in word naming. Findings indicate the supplementary motor association cortex (SMA) is involved in this cognitive process.

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Comparing the Frequency Effect Between the Lexical Decision and Naming Tasks in Chinese
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05:38

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Published on: June 29, 2021

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Comparing the Frequency Effect Between the Lexical Decision and Naming Tasks in Chinese
08:08

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Neuroimaging

Background:

  • The Frequency x Regularity interaction influences word naming speed and accuracy.
  • Understanding the neural basis of this interaction is crucial for cognitive models of reading.

Purpose of the Study:

  • To spatially localize the Frequency x Regularity interaction in word naming using functional magnetic resonance imaging (fMRI).
  • To investigate the role of the supplementary motor association cortex (SMA) in this interaction.

Main Methods:

  • Participants performed word naming tasks with varying word frequency and regularity in behavioral and fMRI experiments.
  • The Additive Factors Method (AFM) was applied to reaction times and fMRI data.
  • fMRI data were analyzed to identify brain regions showing an overadditive interaction pattern.

Main Results:

  • Behavioral data showed longer reaction times for low-frequency exception words.
  • fMRI revealed significant activation in the SMA for low-frequency exception words.
  • SMA hemodynamic intensities exhibited an overadditive interaction pattern mirroring behavioral findings.

Conclusions:

  • The supplementary motor association cortex (SMA) is a potential neural source of the Frequency x Regularity interaction in word naming.
  • The Additive Factors Method (AFM) can be effectively applied to fMRI data to understand cognitive interactions.
  • Findings suggest the SMA's role in articulatory preparation and motor programming during word production.