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Related Concept Videos

Auditory Pathway01:15

Auditory Pathway

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
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Related Experiment Video

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Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Functional and structural brain connectivity in congenital deafness.

Karolyne Dell Ducas1, Antonio Carlos da S Senra Filho2,3, Pedro Henrique Rodrigues Silva3

  • 1Department of Medical Clinics, FMRP, University of Sao Paulo, Ribeirão Preto, Brazil. karoldducas@gmail.com.

Brain Structure & Function
|March 19, 2021
PubMed
Summary
This summary is machine-generated.

Congenital deafness leads to significant brain reorganization in functional and structural networks. Sign language learners show altered connectivity in visual, motor, and attention networks, supporting adaptation.

Keywords:
Brain connectivityDTIDeafnessSign languagefMRI

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Neuroimaging

Background:

  • Neural plasticity and language processing in deaf individuals are under investigation.
  • Intrinsic brain organization in congenital deafness remains an open research question.

Purpose of the Study:

  • To investigate differences in brain organization in congenitally deaf individuals.
  • To examine resting-state functional patterns and white matter structure.

Main Methods:

  • Functional and diffusion magnetic resonance imaging (MRI) were used.
  • 18 congenitally deaf individuals and 18 age-sex-matched hearing controls participated.

Main Results:

  • Deaf individuals showed higher functional connectivity between the posterior cingulate cortex and visual/motor networks.
  • Lower functional connectivity was observed between salience and language networks, with right-hemisphere changes.
  • Structural connectivity changes were noted in occipital and parietal lobes, impacting attention and cognitive filtering networks.

Conclusions:

  • Congenital deafness and sign language acquisition induce significant brain functional and structural reorganization.
  • Reorganization supports large-scale brain networks for attention, environmental monitoring, and sensorimotor control.