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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.
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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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Localizing Function-specific Targets for Transcranial Magnetic Stimulation in the Absence of Navigation Equipment
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[Localization of language function in the brain].

Hiroyuki Miyashita1, Kuniyoshi L Sakai

  • 1Department of Basic Science, The University of Tokyo, Tokyo, Japan.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|December 8, 2011
PubMed
Summary
This summary is machine-generated.

Brain imaging and lesion studies reveal distinct brain modules for language processing. Research highlights a specific grammar center in the left frontal cortex, advancing our understanding of language localization.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Linguistics

Context:

  • The localization of brain function, particularly language, has been debated for over 150 years since Paul Broca's initial reports.
  • Advancements in non-invasive brain imaging techniques have enabled more precise investigation of cognitive functions, including language processing.
  • The concept of double dissociation in lesion studies has been crucial for inferring localized cognitive functions.

Purpose:

  • To review recent neuroimaging and lesion studies investigating the localization of language functions within the human brain.
  • To present evidence supporting the existence of a specialized grammar center in the left frontal cortex.
  • To discuss the modular organization of language processing, including syntax and phonology.

Summary:

  • Neuroimaging studies, employing subtraction and correlation analyses, indicate that syntax, phonology, and sentence comprehension are processed in distinct cortical regions.
  • Evidence strongly suggests that the syntactic module is localized in the left lateral premotor cortex and specific parts of the left inferior frontal gyrus.
  • This modular perspective reframes aphasia as deficits in syntactic or phonological processing, necessitating an update to classical speech production/comprehension models.

Impact:

  • Findings challenge traditional models of language processing and suggest a specialized neural architecture for human language.
  • The identification of a grammar center provides a more precise understanding of the cortical basis of syntactic computation.
  • Future research in the neuroscience of language will further elucidate the precise neural computations underlying language in the human brain.