Decoding stimulus identity from multi-unit activity and local field potentials along the ventral auditory stream in the awake primate: implications for cortical neural prostheses.
J Neural Eng
; 10(1): 016010, 2013 Feb.
Article
en En
| MEDLINE
| ID: mdl-23283406
ABSTRACT
OBJECTIVE:
Hierarchical processing of auditory sensory information is believed to occur in two streams a ventral stream responsible for stimulus identity and a dorsal stream responsible for processing spatial elements of a stimulus. The objective of the current study is to examine neural coding in this processing stream in the context of understanding the possibility for an auditory cortical neural prosthesis.APPROACH:
We examined the selectivity for species-specific primate vocalizations in the ventral auditory processing stream by applying a statistical classifier to neural data recorded from microelectrode arrays. Multi-unit activity (MUA) and local field potential (LFP) data recorded simultaneously from primary auditory complex (AI) and rostral parabelt (PBr) were decoded on a trial-by-trial basis. MAINRESULTS:
While decode performance in AI was well above chance, mean performance in PBr did not deviate >15% from chance level. Mean performance levels were similar for MUA and LFP decodes. Increasing the spectral and temporal resolution improved decode performance; while inter-electrode spacing could be as large as 1.14 mm without degrading decode performance.SIGNIFICANCE:
These results serve as preliminary guidance for a human auditory cortical neural prosthesis; instructing interface implementation, microstimulation patterns and anatomical placement.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Corteza Auditiva
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Vías Auditivas
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Vigilia
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Potenciales de Acción
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Prótesis Neurales
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Macaca mulatta
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Microelectrodos
Límite:
Animals
Idioma:
En
Revista:
J Neural Eng
Asunto de la revista:
NEUROLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos