Concepedia

Concept

speech neural systems

Parents

746

Publications

70.3K

Citations

2.5K

Authors

853

Institutions

Sensorimotor Speech Integration

2006 - 2012

During the period from 2006 to 2012, research in speech neural systems foregrounded sensorimotor integration as a central mechanism underlying both speech perception and production. Premotor and frontal–temporal circuits were repeatedly implicated, with gesture–speech coupling and embodied processing driving left-lateralized sensorimotor networks. The superior temporal sulcus and surrounding temporal cortex emerged as key substrates for lexical-phonological access and intelligibility, while reading and cross-modal mapping linked visual word processing to temporal language areas via ventral and dorsal routes. Across development, word learning and consolidation moved beyond infancy to encompass adults, revealing evolving lexical representations and stabilization of new spoken words. Historical Significance: This era shifted the field away from purely auditory accounts toward action-oriented, sensorimotor theories of speech, favoring oscillatory dynamics as organizing principles for speech networks. Evidence that premotor cortex plays an essential role in speech perception reframed perceptual decoding as a motorly grounded process, setting the stage for motor-speech models and neuroprosthetic ambitions. Breakthrough demonstrations showed that speech features could be reconstructed from activity in nonprimary auditory cortex and that phonemic content could be decoded from invasive brain signals, providing concrete neural bridges between perception and production and catalyzing subsequent advances in speech neuroprostheses and cross-modal decoding.

Sensorimotor integration and dorsal speech pathways implicate premotor and frontal–temporal circuits in both speech perception and production; gesture–speech coupling and embodied mechanisms recruit left-lateralized sensorimotor networks. [3], [6], [18], [19], [20], [16], [17].

Temporal and lexical-phonological networks emphasize the superior temporal sulcus (STS) and temporal cortex for speech perception, intelligibility, and sublexical phonology, with functional magnetic resonance imaging (fMRI) and positron emission tomography evidence guiding lexical access and memory for phonology. [5], [8], [9], [10], [12], [11].

Reading and cross-modal mapping rely on ventral and dorsal language routes, connecting visual word processing to temporal language areas; frequency effects and lexical access modulate processing along these routes in functional magnetic resonance imaging (fMRI) studies. [12], [10], [5], [14].

Hemispheric lateralization and asymmetry originate in sensory cortices with early left-dominance in speech networks; posterior auditory cortices contribute to a left-lateralized speech system. [7], [20], [19].

Word learning and consolidation extend across development from infants to adults, with neural substrates supporting acquisition and stabilization of novel spoken words; infant word understanding and adult word learning reveal evolving lexical representations. [11], [13].

Sensorimotor Multiscale Speech Processing

2013 - 2020