Slow Modulation of Ongoing Discharge in the Auditory Cortex during an Interval-Discrimination Task

Autor: Juan M. Abolafia, Marina eMartinez-Garcia, Gustavo eDeco, Maria V Sanchez-Vives
Rok vydání: 2011
Předmět:
Awake
Cognitive Neuroscience
media_common.quotation_subject
Rate modulation
Decision Making
Spontaneous generation
Stimulus (physiology)
Auditory cortex
lcsh:RC346-429
lcsh:RC321-571
03 medical and health sciences
Cellular and Molecular Neuroscience
0302 clinical medicine
Hearing
Auditory stimulation
Perception
Attention
chronically implanted
spontaneous activity
lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry
Auditory
lcsh:Neurology. Diseases of the nervous system
Original Research
030304 developmental biology
media_common
0303 health sciences
Spontaneous
Interstimulus interval
Presa de decisions
rat auditory cortex
Sensory Systems
Generació espontània
Brain state
Auditory brainstem response
Rat
Psychology
Decision making
Neuroscience
030217 neurology & neurosurgery
Decision-making
Oïda
Zdroj: Dipòsit Digital de la UB
Universidad de Barcelona
Recercat. Dipósit de la Recerca de Catalunya
instname
Frontiers in Integrative Neuroscience, Vol 5 (2011)
Frontiers in Integrative Neuroscience
ISSN: 1662-5145
Popis: In this study, we recorded single unit activity from rat auditory cortex while the animals performed an interval-discrimination task. The animals had to decide whether two auditory stimuli were separated by either 150 or 300 ms, and go to the left or right nose poke accordingly. Spontaneous firing in between auditory responses was compared in the attentive versus non-attentive brain states. We describe the firing rate modulation detected during intervals while there was no auditory stimulation. Nearly 18% of neurons (n = 14) showed a prominent neuronal discharge during the interstimulus interval, in the form of an upward or downward ramp towards the second auditory stimulus. These patterns of spontaneous activity were often modulated in the attentive versus passive trials. Modulation of the spontaneous firing rate during the task was observed not only between auditory stimuli, but also in the interval preceding the stimulus. These slow modulatory components could be locally generated or the result of a top-down influence originated in higher associative association areas. Such a neuronal discharge may be related to the computation of the interval time and contribute to the perception of the auditory stimulus. Supported by a grant from the Ministerio de Ciencia e Innovación/n(BFU2008-01371/BFI) to MVS–V. MM–G and GD were supported/nby the European Union grant BRAINSCALES, by the Spanish/nResearch Project SAF2010-16085 and by the CONSOLIDERINGENIO/n2010 Programme CSD2007-00012, and EU FP7/2007-/n2013 under grant agreement 214728-2.
Databáze: OpenAIRE
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