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Related Experiment Videos

Functional links between motor and language systems.

Friedemann Pulvermüller1, Olaf Hauk, Vadim V Nikulin

  • 1Cognition and Brain Sciences Unit, Medical Research Council, 15 Chaucer Road, Cambridge CB2 2EF, UK. friedmann.pulvermuller@mrc-cbu.cam.ac.uk

The European Journal of Neuroscience
|March 1, 2005
PubMed
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Transcranial magnetic stimulation (TMS) reveals category-specific links between language and motor systems. Left hemisphere stimulation differentially affected processing of action-related words, challenging modular theories.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psycholinguistics

Background:

  • The relationship between language processing and motor control remains a key area of investigation.
  • Modular theories propose distinct, independent systems for language and motor functions.
  • Understanding how semantic information about actions influences language processing is crucial.

Purpose of the Study:

  • To investigate the functional relationship between language and motor systems in the left hemisphere.
  • To determine if specific motor cortical areas influence the processing of semantically related action words.
  • To test predictions derived from embodied cognition theories against modular accounts.

Main Methods:

  • Transcranial magnetic stimulation (TMS) applied to left hemisphere motor areas (hand, leg) in right-handed subjects.

Related Experiment Videos

  • Lexical decision tasks involving words related to leg actions versus arm/hand actions.
  • Comparison of response times under different stimulation sites and control conditions (right hemisphere, sham stimulation).

    • Main Results:

    • A significant interaction between stimulation site and word category was observed.
    • Stimulation of arm motor areas facilitated processing of arm-related words, while leg area stimulation facilitated leg-related word processing.
    • No such category-specific effects were found in control conditions (right hemisphere or sham TMS).

    Conclusions:

    • The left hemispheric cortical systems for language and action are linked in a category-specific manner.
    • Activation in motor and premotor areas influences the processing of words semantically related to specific actions.
    • These findings challenge modular theories and provide evidence for interaction between language and motor systems during semantic processing.