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Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation
12:09

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Published on: June 14, 2014

Reading aloud boosts connectivity through the putamen.

Mohamed L Seghier1, Cathy J Price

  • 1Wellcome Trust Centre for Neuroimaging, Institute of Neurology, UCL, London WC1N 3BG, UK. m.seghier@fil.ion.ucl.ac.uk

Cerebral Cortex (New York, N.Y. : 1991)
|June 30, 2009
PubMed
Summary

This study reveals the putamen plays a key role in reading aloud by enhancing connections between visual and speech areas. This pathway is crucial for skilled reading, though other routes also exist.

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Human Brain Function

Background:

  • Thalamic and putamen activation is observed during reading and speech.
  • The interaction between these areas and other reading/speech regions remains unclear.

Purpose of the Study:

  • To investigate how reading aloud modulates neuronal interactions between visual recognition and articulatory areas.
  • To examine the role of the putamen and thalamus in these reading-related pathways.

Main Methods:

  • Dynamic causal modeling was used in skilled English readers.
  • Twenty-seven potential pathways from the occipito-temporal sulcus (aOT) to the precentral cortex (PrC) were analyzed.
  • Neuronal interactions were compared during reading aloud versus picture naming and control tasks.

Main Results:

  • Reading aloud significantly enhances the aOT-PrC pathway through the putamen, not the thalamus.
  • An alternative reading pathway, independent of the putamen and thalamus, was also identified.
  • The putamen's role in reading is significant but not exclusive.

Conclusions:

  • The putamen plays a distinct role in the neurobiology of reading.
  • Individual reading strategies and preferences may influence the specific neural pathways utilized.
  • Further research can explore the variability in putamen involvement across different reading contexts.