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Somatosensory Event-related Potentials from Orofacial Skin Stretch Stimulation

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Published on: December 18, 2015

Neural basis of speech perception.

Gregory Hickok¹, David Poeppel²

¹Department of Cognitive Sciences, Center for Language Science and Center for Cognitive Neuroscience, University of California, Irvine, CA, USA.

Handbook of Clinical Neurology

|March 2, 2015

Summary

This study presents a dual-stream model for speech processing, distinguishing between ventral (comprehension) and dorsal (articulation mapping) pathways. This neuroanatomic model clarifies how the brain processes spoken language.

Keywords:

Speech perception aphasia auditory comprehension language sensorimotor integration speech production

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Area of Science:

Neuroscience
Cognitive Science
Linguistics

Background:

Characterizing the functional neuroanatomy of speech processing presents significant challenges.
Previous research often overlooked task effects, hindering accurate mapping of speech-related neural systems.

Purpose of the Study:

To propose and summarize a dual-stream model of speech processing.
To address limitations in previous neuroanatomic mapping of speech systems by incorporating task effects.

Main Methods:

Summarization of a dual-stream model.
Integration of task-based considerations into neuroanatomic mapping.

Main Results:

A dual-stream model is proposed, comprising a ventral stream for speech comprehension and a dorsal stream for mapping acoustic signals to articulatory networks.
The ventral stream exhibits bilateral organization with hemispheric specializations.
The dorsal stream demonstrates strong left-hemisphere dominance.

Conclusions:

The dual-stream model provides a framework for understanding the neuroanatomy of speech processing.
Task effects are crucial for accurately characterizing the distinct roles and lateralization of speech processing streams.