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Related Concept Videos

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.
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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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Lateralization01:28

Lateralization

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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: Sep 20, 2025

Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
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Structural Integrity and Functional Neural Activity Associated with Oral Language Function after Stroke.

Sunghyon Kyeong1, Hyunkoo Kang2, Dae Hyun Kim3

  • 1Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul 03722, Korea.

Journal of Clinical Medicine
|June 10, 2022
PubMed
Summary

Brain reorganization after stroke impacts language. This study links structural integrity and neural activity in specific brain pathways to improved oral language function in stroke patients.

Keywords:
aphasiaconnectivityrecoverystroke

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Area of Science:

  • Neuroscience
  • Neurology
  • Radiology

Background:

  • Language impairment is a common consequence of stroke.
  • Brain reorganization following cerebral infarction and its effect on language function remain incompletely understood.
  • Middle cerebral artery infarction frequently leads to aphasia, necessitating investigation into neural correlates.

Purpose of the Study:

  • To investigate the association between structural integrity and functional neural activity and language function in aphasic patients.
  • To explore brain reorganization patterns in patients with middle cerebral artery infarction.
  • To correlate neuroimaging findings with performance on oral language assessments.

Main Methods:

  • Observational study utilizing magnetic resonance imaging (MRI) data from 20 patients.
  • Voxel-wise linear regression analysis correlating fractional anisotropy (FA) and fractional amplitude of low-frequency fluctuation (fALFF) with Western Aphasia Battery (WAB) scores.
  • Controlled for patient age and time elapsed since stroke.

Main Results:

  • Spontaneous speech correlated with FA in the left dorsal stream and right posterior corpus callosum, and fALFF in pontomedullary cranial nuclei.
  • Comprehension showed a positive association with the left ventral stream.
  • Naming correlated with the left ventral stream, bilateral occipitofrontal fasciculus, and left supramarginal gyrus fALFF.

Conclusions:

  • The dorsal and ventral streams play crucial roles in articulation and meaning following stroke-induced neural reorganization.
  • Specific subdomains of oral language function, particularly those with visual components, rely on right-hemisphere visual association areas.
  • Understanding these neural pathways aids in comprehending post-stroke language recovery.