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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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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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Long-term Potentiation01:35

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Long-term Potentiation01:25

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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Language and Cognition01:27

Language and Cognition

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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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Epilepsy and Seizures: Overview01:24

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Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
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Updated: Dec 31, 2025

Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
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Lesion-Specific Language Network Alterations in Temporal Lobe Epilepsy.

O Foesleitner1, K-H Nenning1, L Bartha-Doering2

  • 1From the Departments of Biomedical Imaging and Image-Guided Therapy (O.F., K.-H.N., M.S., V.S., G.L., D.P., G.K.).

AJNR. American Journal of Neuroradiology
|January 4, 2020
PubMed
Summary
This summary is machine-generated.

Different temporal lobe epilepsy pathologies cause distinct changes in brain language networks, as shown by fMRI. This network analysis offers insights into language organization and personalized epilepsy treatment.

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Area of Science:

  • Neuroscience
  • Neurology
  • Medical Imaging

Background:

  • Temporal lobe epilepsy (TLE) can impair language function.
  • The specific impact of different epileptogenic lesions on language networks is not well understood.
  • Functional connectivity alterations in the language connectome are hypothesized to vary by lesion type.

Purpose of the Study:

  • To investigate how different epileptogenic lesions in TLE affect the functional language connectome.
  • To compare language network alterations in patients with mesiotemporal sclerosis, tumors, and nonlesional TLE.
  • To identify potential imaging biomarkers for language function in TLE.

Main Methods:

  • Task-based functional MRI (fMRI) was used in 101 TLE patients and 22 healthy controls.
  • Participants underwent fMRI during language tasks.
  • Analysis included laterality indices and functional connectivity between language areas.

Main Results:

  • fMRI activation laterality indices did not differentiate patient groups.
  • Functional connectivity analysis revealed the most significant alterations in left mesiotemporal sclerosis.
  • Connectivity strength correlated with naming and verbal fluency, suggesting network integrity impacts language performance.

Conclusions:

  • Different TLE pathologies are associated with distinct functional language connectome alterations.
  • fMRI functional connectivity analysis provides novel insights into language organization in TLE.
  • These findings support personalized treatment strategies for epilepsy patients based on imaging biomarkers.