Task-dependent modulation of the visual sensory thalamus assists visual-speech recognition
Autor/a
Díaz Menéndez, Begoña
Blank, Helen
Von Kriegstein, Katharina
Data de publicació
2018-09ISSN
1053-8119
Resum
The cerebral cortex modulates early sensory processing via feed-back connections to sensory pathway nuclei. The functions of this top-down modulation for human behavior are poorly understood. Here, we show that top-down modulation of the visual sensory thalamus (the lateral geniculate body, LGN) is involved in visual-speech recognition. In two independent functional magnetic resonance imaging (fMRI) studies, LGN response increased when participants processed fast-varying features of articulatory movements required for visual-speech recognition, as compared to temporally more stable features required for face identification with the same stimulus material. The LGN response during the visual-speech task correlated positively with the visual-speech recognition scores across participants. In addition, the task-dependent modulation was present for speech movements and did not occur for control conditions involving non-speech biological movements. In face-to-face communication, visual speech recognition is used to enhance or even enable understanding what is said. Speech recognition is commonly explained in frameworks focusing on cerebral cortex areas. Our findings suggest that task-dependent modulation at subcortical sensory stages has an important role for communication: Together with similar findings in the auditory modality the findings imply that task-dependent modulation of the sensory thalami is a general mechanism to optimize speech recognition.
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
English
Matèries (CDU)
61 - Medicina
Paraules clau
Ressonància magnètica funcional
Nucli geniculat lateral
Lectura de llavis
Parla
Resonancia magnética funcional
Núcleo geniculado lateral
Lectura de labios
Habla
Functional MRI
Lateral geniculate nucleus
Lipreading
Speech
Pàgines
58
Publicat per
Elsevier
Col·lecció
178;
Publicat a
NeuroImage
Citació
Díaz Menéndez, Begoña; Blank, Helen; Von Kriegstein, Katharina. Task-dependent modulation of the visual sensory thalamus assists visual-speech recognition. NeuroImage, 2018, 178, p. 721-734. Disponible en: <https://www.sciencedirect.com/science/article/abs/pii/S1053811918304397?via%3Dihub>. Fecha de acceso: 29 jun. 2021. DOI: 10.1016/j.neuroimage.2018.05.032
Aquest element apareix en la col·lecció o col·leccions següent(s)
- Ciències de la Salut [745]
Drets
© 2018. This manuscript version is made available under the CC-BY-NC-SA 4.0 license. https://creativecommons.org/licenses/by-nc-sa/4.0/
Excepte que s'indiqui una altra cosa, la llicència de l'ítem es descriu com https://creativecommons.org/licenses/by-nc-sa/4.0/