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When the hands speak.

Maurizio Gentilucci¹, Riccardo Dalla Volta, Claudia Gianelli

¹Dipartimento di Neuroscienze, Università di Parma, via Volturno 39, 43100 Parma, Italy. gentiluc@unipr.it

Journal of Physiology, Paris

|April 29, 2008

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The control of spoken language and arm gestures share the same neural system, potentially originating from primate motor control evolution. This integrated system, located in Broca

Area of Science:

Neuroscience
Primatology
Linguistics

Background:

Primate premotor cortex studies reveal mirror systems and dual hand-mouth command systems.
These systems may have evolved from ingestion functions to support combined vocal-manual communication.

Purpose of the Study:

To review evidence linking spoken language control with arm gesture control.
To explore the evolutionary and developmental integration of manual and vocal communication.

Main Methods:

Review of existing behavioral, neuroimaging, and repetitive transcranial magnetic stimulation (rTMS) studies.

Main Results:

Manual gestures integrate with speech production in humans, influencing lip kinematics and voice spectra.

Related Experiment Videos

Manual actions are crucial for language acquisition in children from the babbling stage.

Behavioral data show reciprocal influence between words and symbolic gestures.

Conclusions:

The neural system governing speech and gesture control is likely located in Broca's area.
Evidence suggests a shared neural basis for manual and vocal communication, rooted in evolutionary adaptations.