The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Bijan Pesaran - One of the best experts on this subject based on the ideXlab platform.
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Sensory Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
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Sensory–Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
M. Ishikawa - One of the best experts on this subject based on the ideXlab platform.
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High-speed Sensory-Motor fusion for robotic grasping
Measurement Science and Technology, 2002Co-Authors: A. Namiki, Takashi Komuro, M. IshikawaAbstract:In this paper a new high-speed vision device and its application to a grasp system is proposed, and we discuss a processing architecture for grasping based on visual and tactile feedback designed with real-time control in mind. First, we describe a high-speed vision chip that serves as a robotic eye that includes a general-purpose parallel processing array along with a photo-detector all on a single silicon chip. Next, we present a grasping algorithm based on real-time visual and tactile feedback, and a high-speed Sensory–Motor fusion system for robotic grasping. We then describe a grasping experiment using high-speed vision, and finally, based on these results, the effectiveness of high-speed Sensory–Motor fusion for robotic grasping is discussed.
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High-speed Sensory-Motor fusion based on dynamics matching
Proceedings of the IEEE, 2002Co-Authors: A. Namiki, Takashi Komuro, M. IshikawaAbstract:This paper discusses a design concept of a Sensory-Motor fusion system to achieve high performance in a dynamic changing environment. From the viewpoint of a dynamic system, the new concept called "dynamics matching" is proposed to match the dynamics constraints of a system. Based on this concept, we describe a high-speed vision chip that has a general purpose parallel processing array along with a photodetector all in a single silicon chip. Next we describe a new Sensory-Motor fusion system which consists of a hierarchical parallel processing system, a vision chip system, and a multifingered hand-arm. All Sensory feedback, including visual feedback, can be achieved in 1 ms. In addition, as an application of the system, we demonstrate high-speed grasping using visual and force feedback.
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1-ms Sensory-Motor fusion system
IEEE ASME Transactions on Mechatronics, 2000Co-Authors: A. Namiki, Y. Nakabo, I. Ishii, M. IshikawaAbstract:To achieve robotic manipulation tasks in the real world in which there are dynamic changes in an environment, we have developed a high-speed Sensory-Motor fusion system consisting of a multiprocessor system, a massively parallel active vision, and a multifingered hand-arm. This 1-ms Sensory-Motor fusion system has the following three features: 1) 1-ms high-speed visual and force feedback to deal with changes in the real world environment; 2) heterogeneous sensor fusion to process a multiple environments; and 3) hierarchical parallel processing architecture to perform multiple tasks. These features allow dynamic motion in the real-world environment.
Chad Carlson - One of the best experts on this subject based on the ideXlab platform.
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Sensory Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
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Sensory–Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
Stéphane Ibrahime - One of the best experts on this subject based on the ideXlab platform.
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Dual-task automatization: The key role of Sensory–Motor modality compatibility
Attention Perception & Psychophysics, 2018Co-Authors: Francois Maquestiaux, Alexis Defer, Eric Ruthruff, Stéphane IbrahimeAbstract:How do people automatize their dual-task performance through bottleneck bypassing (i.e., accomplish parallel processing of the central stages of two tasks)? In the present work we addressed this question, evaluating the impact of Sensory–Motor modality compatibility—the similarity in modality between the stimulus and the consequences of the response. We hypothesized that incompatible Sensory–Motor modalities (e.g., visual–vocal) create conflicts within modality-specific working memory subsystems, and therefore predicted that tasks producing such conflicts would be performed less automatically after practice. To probe for automaticity, we used a transfer psychological refractory period (PRP) procedure: Participants were first trained on a visual task (Exp. 1) or an auditory task (Exp. 2) by itself, which was later presented as Task 2, along with an unpracticed Task 1. The Task 1–Task 2 Sensory–Motor modality pairings were either compatible (visual–manual and auditory–vocal) or incompatible (visual–vocal and auditory–manual). In both experiments we found converging indicators of bottleneck bypassing (small dual-task interference and a high rate of response reversals) for compatible Sensory–Motor modalities, but indicators of bottlenecking (large dual-task interference and few response reversals) for incompatible Sensory–Motor modalities. Relatedly, the proportion of individuals able to bypass the bottleneck was high for compatible modalities but very low for incompatible modalities. We propose that dual-task automatization is within reach when the tasks rely on codes that do not compete within a working memory subsystem.
Gregory B Cogan - One of the best experts on this subject based on the ideXlab platform.
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Sensory Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
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Sensory–Motor transformations for speech occur bilaterally
Nature, 2014Co-Authors: Gregory B Cogan, Thomas Thesen, Chad Carlson, Werner Doyle, Orrin Devinsky, Bijan PesaranAbstract:Direct neural recordings from electrodes over bilateral cortices show that Sensory–Motor transformations for speech occur bilaterally; neural responses are robust during both perception and production in an overt word-repetition task, and bilateral Sensory–Motor responses can perform transformations between speech-perception and speech-production representations during a non-word transformation task. It has long been believed that speech perception and production are linked, but the neural mechanisms underlying this connection and the question of hemispheric lateralization for either function have remained unknown. Here, Bijan Pesaran and colleagues reveal that Sensory–Motor transformations occur bilaterally and thus underscore the existence of a bilateral Sensory–Motor system for speech. This contrasts with higher-order language processes, which are lateralized to the left hemisphere. Historically, the study of speech processing has emphasized a strong link between auditory perceptual input and Motor production output1,2,3,4. A kind of ‘parity’ is essential, as both perception- and production-based representations must form a unified interface to facilitate access to higher-order language processes such as syntax and semantics, believed to be computed in the dominant, typically left hemisphere5,6. Although various theories have been proposed to unite perception and production2,7, the underlying neural mechanisms are unclear. Early models of speech and language processing proposed that perceptual processing occurred in the left posterior superior temporal gyrus (Wernicke’s area) and Motor production processes occurred in the left inferior frontal gyrus (Broca’s area)8,9. Sensory activity was proposed to link to production activity through connecting fibre tracts, forming the left lateralized speech Sensory–Motor system10. Although recent evidence indicates that speech perception occurs bilaterally11,12,13, prevailing models maintain that the speech Sensory–Motor system is left lateralized11,14,15,16,17,18 and facilitates the transformation from Sensory-based auditory representations to Motor-based production representations11,15,16. However, evidence for the lateralized computation of Sensory–Motor speech transformations is indirect and primarily comes from stroke patients that have speech repetition deficits (conduction aphasia) and studies using covert speech and haemodynamic functional imaging16,19. Whether the speech Sensory–Motor system is lateralized, like higher-order language processes, or bilateral, like speech perception, is controversial. Here we use direct neural recordings in subjects performing Sensory–Motor tasks involving overt speech production to show that Sensory–Motor transformations occur bilaterally. We demonstrate that electrodes over bilateral inferior frontal, inferior parietal, superior temporal, preMotor and somatoSensory cortices exhibit robust Sensory–Motor neural responses during both perception and production in an overt word-repetition task. Using a non-word transformation task, we show that bilateral Sensory–Motor responses can perform transformations between speech-perception- and speech-production-based representations. These results establish a bilateral sublexical speech Sensory–Motor system.
