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Mesoscopic cortical network reorganization during recovery of optic nerve injury in GCaMP6s mice.
- Source :
-
Scientific reports [Sci Rep] 2020 Dec 08; Vol. 10 (1), pp. 21472. Date of Electronic Publication: 2020 Dec 08. - Publication Year :
- 2020
-
Abstract
- As the residual vision following a traumatic optic nerve injury can spontaneously recover over time, we explored the spontaneous plasticity of cortical networks during the early post-optic nerve crush (ONC) phase. Using in vivo wide-field calcium imaging on awake Thy1-GCaMP6s mice, we characterized resting state and evoked cortical activity before, during, and 31 days after ONC. The recovery of monocular visual acuity and depth perception was evaluated in parallel. Cortical responses to an LED flash decreased in the contralateral hemisphere in the primary visual cortex and in the secondary visual areas following the ONC, but was partially rescued between 3 and 5 days post-ONC, remaining stable thereafter. The connectivity between visual and non-visual regions was disorganized after the crush, as shown by a decorrelation, but correlated activity was restored 31 days after the injury. The number of surviving retinal ganglion cells dramatically dropped and remained low. At the behavioral level, the ONC resulted in visual acuity loss on the injured side and an increase in visual acuity with the non-injured eye. In conclusion, our results show a reorganization of connectivity between visual and associative cortical areas after an ONC, which is indicative of spontaneous cortical plasticity.
- Subjects :
- Animals
Calcium analysis
Disease Models, Animal
Female
Male
Mice, Inbred C57BL
Nerve Crush
Nerve Net pathology
Optic Nerve pathology
Optic Nerve Injuries pathology
Optic Nerve Injuries therapy
Visual Acuity
Visual Cortex pathology
Nerve Net physiopathology
Optic Nerve physiopathology
Optic Nerve Injuries physiopathology
Visual Cortex physiopathology
Subjects
Details
- Language :
- English
- ISSN :
- 2045-2322
- Volume :
- 10
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Scientific reports
- Publication Type :
- Academic Journal
- Accession number :
- 33293617
- Full Text :
- https://doi.org/10.1038/s41598-020-78491-z