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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.
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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Language and Cognition01:27

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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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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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Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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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.
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Related Experiment Video

Updated: Jan 19, 2026

Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
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Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia

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Differences in Brain Areas Affecting Language Function After Stroke.

Sunghyon Kyeong1, Hyunkoo Kang2, Sohyon Kyeong3

  • 1From the Department of Physical Medicine and Rehabilitation (Sohyon Kyeong, D.H.K.), Veterans Health Service Medical Center, Seoul, South Korea.

Stroke
|September 24, 2019
PubMed
Summary

Brain connectivity linked to language recovery after stroke differs by phase. Early recovery involves bilateral dorsal pathways, while later recovery shows less lateralization, impacting ventral pathways.

Keywords:
aphasiabraincorpus callosumrecovery of functionspeech

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Related Experiment Videos

Last Updated: Jan 19, 2026

Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
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Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition
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Brain Infarct Segmentation and Registration on MRI or CT for Lesion-symptom Mapping
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Area of Science:

  • Neuroscience
  • Neurology
  • Neuroimaging

Background:

  • Brain regions supporting functional recovery after stroke vary between acute and chronic phases.
  • Understanding these differences is crucial for targeted rehabilitation strategies.

Purpose of the Study:

  • To investigate brain areas associated with language function recovery at different time points post-stroke.
  • To differentiate neural correlates of language function in subacute versus chronic stroke survivors.

Main Methods:

  • Voxel-wise linear regression analyses using diffusion tensor imaging (DTI) and fractional anisotropy (FA) mapping.
  • Patients with post-stroke aphasia were categorized into subacute (≤3 months) and chronic (>12 months) groups.
  • Language functions assessed included spontaneous speech, comprehension, repetition, and naming.

Main Results:

  • In the subacute phase, left dorsal pathway connectivity correlated positively with speech, repetition, and naming. Right hemisphere white matter tracts showed negative associations.
  • Comprehension was linked to left superior temporal gyrus and right corona radiata in the subacute phase.
  • In the chronic phase, comprehension was associated with the right corpus callosum.

Conclusions:

  • Language function recovery in the subacute phase involves more lateralized dorsal pathways and bilateral brain areas.
  • Chronic phase recovery shows less lateralization, with ventral pathways being influenced bilaterally in both subacute and chronic periods.