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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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Neural Regulation01:37

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Related Experiment Video

Updated: Jun 27, 2025

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Bayesian modelling disentangles language versus executive control disruption in stroke.

Gesa Hartwigsen1,2, Jae-Sung Lim3, Hee-Joon Bae4

  • 1Wilhelm Wundt Institute for Psychology, Leipzig University, 04109 Leipzig, Germany.

Brain Communications
|May 6, 2024
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Summary
This summary is machine-generated.

Stroke-induced brain damage impairs cognition, affecting language and executive functions. This study used Bayesian modeling in 1080 patients to link specific brain lesion locations to distinct cognitive deficits, revealing hemispheric specializations.

Keywords:
controldomain-generallateralizationlesionspeech

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Stroke is a primary cause of long-term disability, frequently leading to persistent cognitive deficits in language and executive functions.
  • Understanding the distinct and overlapping impairments in language versus executive control after stroke is crucial for effective treatment.
  • Existing research has not fully specified the relationship between stroke topology and these specific cognitive deficits.

Purpose of the Study:

  • To deconvolve language and executive control impairments in relation to stroke topology using advanced statistical modeling.
  • To identify distinct cognitive factors and their association with specific brain lesion locations in a large stroke patient cohort.
  • To elucidate the hemispheric specialization of cognitive functions affected by stroke.

Main Methods:

  • Utilized a Bayesian hierarchical modeling approach on a cohort of 1080 stroke patients.
  • Assessed cognitive function using a comprehensive neuropsychological test battery, including measures for global cognition, language, executive functions, visuospatial skills, and memory.
  • Employed multivariate factor analysis to extract distinct cognitive factors from outcome scores predicted by lesion topology.

Main Results:

  • Four distinct cognitive factors were identified, differentiating left- and right-hemispheric contributions to ischemic lesions.
  • Language and general cognitive performance were primarily associated with left-hemispheric frontal and temporal cortex damage.
  • Executive control functions were strongly linked to right-hemispheric posterior occipital cortex damage, while executive speech and verbal memory impairments were mainly associated with left-hemispheric lesions.

Conclusions:

  • Findings highlight the causal implications of hemispheric specialization for cognitive functions post-stroke.
  • The study provides a detailed map of how specific brain lesion locations relate to distinct cognitive deficits.
  • Results pave the way for developing more targeted, subgroup-specific treatment protocols for stroke survivors.