A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex.
Substantial progress in the field of neuroscience has been made from anaesthetized preparations. Ketamine is one of the most used drugs in electrophysiology studies, but how ketamine affects neuronal responses is poorly understood. Here, we used in vivo electrophysiology and computational modelling...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2023-02-01
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| Series: | PLoS Biology |
| Online Access: | https://doi.org/10.1371/journal.pbio.3002013 |
| _version_ | 1797848197726470144 |
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| author | Luciana López-Jury Francisco García-Rosales Eugenia González-Palomares Johannes Wetekam Michael Pasek Julio C Hechavarria |
| author_facet | Luciana López-Jury Francisco García-Rosales Eugenia González-Palomares Johannes Wetekam Michael Pasek Julio C Hechavarria |
| author_sort | Luciana López-Jury |
| collection | DOAJ |
| description | Substantial progress in the field of neuroscience has been made from anaesthetized preparations. Ketamine is one of the most used drugs in electrophysiology studies, but how ketamine affects neuronal responses is poorly understood. Here, we used in vivo electrophysiology and computational modelling to study how the auditory cortex of bats responds to vocalisations under anaesthesia and in wakefulness. In wakefulness, acoustic context increases neuronal discrimination of natural sounds. Neuron models predicted that ketamine affects the contextual discrimination of sounds regardless of the type of context heard by the animals (echolocation or communication sounds). However, empirical evidence showed that the predicted effect of ketamine occurs only if the acoustic context consists of low-pitched sounds (e.g., communication calls in bats). Using the empirical data, we updated the naïve models to show that differential effects of ketamine on cortical responses can be mediated by unbalanced changes in the firing rate of feedforward inputs to cortex, and changes in the depression of thalamo-cortical synaptic receptors. Combined, our findings obtained in vivo and in silico reveal the effects and mechanisms by which ketamine affects cortical responses to vocalisations. |
| first_indexed | 2024-04-09T18:24:36Z |
| format | Article |
| id | doaj.art-b143dce0d45240f7af1dfac13cb6c15e |
| institution | Directory Open Access Journal |
| issn | 1544-9173 1545-7885 |
| language | English |
| last_indexed | 2024-04-09T18:24:36Z |
| publishDate | 2023-02-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Biology |
| spelling | doaj.art-b143dce0d45240f7af1dfac13cb6c15e2023-04-12T05:30:45ZengPublic Library of Science (PLoS)PLoS Biology1544-91731545-78852023-02-01212e300201310.1371/journal.pbio.3002013A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex.Luciana López-JuryFrancisco García-RosalesEugenia González-PalomaresJohannes WetekamMichael PasekJulio C HechavarriaSubstantial progress in the field of neuroscience has been made from anaesthetized preparations. Ketamine is one of the most used drugs in electrophysiology studies, but how ketamine affects neuronal responses is poorly understood. Here, we used in vivo electrophysiology and computational modelling to study how the auditory cortex of bats responds to vocalisations under anaesthesia and in wakefulness. In wakefulness, acoustic context increases neuronal discrimination of natural sounds. Neuron models predicted that ketamine affects the contextual discrimination of sounds regardless of the type of context heard by the animals (echolocation or communication sounds). However, empirical evidence showed that the predicted effect of ketamine occurs only if the acoustic context consists of low-pitched sounds (e.g., communication calls in bats). Using the empirical data, we updated the naïve models to show that differential effects of ketamine on cortical responses can be mediated by unbalanced changes in the firing rate of feedforward inputs to cortex, and changes in the depression of thalamo-cortical synaptic receptors. Combined, our findings obtained in vivo and in silico reveal the effects and mechanisms by which ketamine affects cortical responses to vocalisations.https://doi.org/10.1371/journal.pbio.3002013 |
| spellingShingle | Luciana López-Jury Francisco García-Rosales Eugenia González-Palomares Johannes Wetekam Michael Pasek Julio C Hechavarria A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. PLoS Biology |
| title | A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. |
| title_full | A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. |
| title_fullStr | A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. |
| title_full_unstemmed | A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. |
| title_short | A neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex. |
| title_sort | neuron model with unbalanced synaptic weights explains the asymmetric effects of anaesthesia on the auditory cortex |
| url | https://doi.org/10.1371/journal.pbio.3002013 |
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