Modulatory effects of somatosensory electrical stimulation on neural activity of the dorsal cochlear nucleus of hamsters

2008 ◽  
Vol 86 (5) ◽  
pp. 1178-1187 ◽  
Author(s):  
Jinsheng Zhang ◽  
Zhenlong Guan
Keyword(s):  
Electrical Stimulation ◽  
Neural Activity ◽  
Cochlear Nucleus ◽  
Dorsal Cochlear Nucleus

scholarly journals Long range channelrhodopsin-assisted circuit mapping of inferior colliculus neurons with blue and red-shifted channelrhodopsins

2019 ◽  
Author(s):  
David Goyer ◽  
Michael T. Roberts
Keyword(s):  
Electrical Stimulation ◽  
Patch Clamp ◽  
Inferior Colliculus ◽  
Long Range ◽  
Cochlear Nucleus ◽  
Auditory Brainstem ◽  
Dorsal Cochlear Nucleus ◽  
Multiple Sources ◽  
Patch Clamp Recording

ABSTRACTWhen investigating neural circuits, a standard limitation of the in vitro patch clamp approach is that axons from multiple sources are often intermixed, making it difficult to isolate inputs from individual sources with electrical stimulation. However, by using channelrhodopsin assisted circuit mapping (CRACM) this limitation can now be overcome. Here, we report a method to use CRACM to map ascending inputs from lower auditory brainstem nuclei and commissural inputs to an identified class of neurons in the inferior colliculus (IC), the midbrain nucleus of the auditory system. In the IC, local, commissural, ascending, and descending axons are heavily intertwined and therefore indistinguishable with electrical stimulation. By injecting a viral construct to drive expression of a channelrhodopsin in a presynaptic nucleus, followed by patch clamp recording to characterize the presence and physiology of channelrhodopsin-expressing synaptic inputs, projections from a specific source to a specific population of IC neurons can be mapped with cell type-specific accuracy. We show that this approach works with both Chronos, a blue light-activated channelrhodopsin, and ChrimsonR, a red-shifted channelrhodopsin. In contrast to previous reports from the forebrain, we find that ChrimsonR is robustly trafficked down the axons of dorsal cochlear nucleus principal neurons, indicating that ChrimsonR may be a useful tool for CRACM experiments in the brainstem. The protocol presented here includes detailed descriptions of the intracranial virus injection surgery, including stereotaxic coordinates for targeting injections to the dorsal cochlear nucleus and IC of mice, and how to combine whole cell patch clamp recording with channelrhodopsin activation to investigate long-range projections to IC neurons. Although this protocol is tailored to characterizing auditory inputs to the IC, it can be easily adapted to investigate other long-range projections in the auditory brainstem and beyond.SUMMARYChannelrhodopsin-assisted circuit mapping (CRACM) is a precision technique for functional mapping of long-range neuronal projections between anatomically and/or genetically identified groups of neurons. Here, we describe how to utilize CRACM to map auditory brainstem connections, including the use of a red-shifted opsin, ChrimsonR.

Tinnitus suppression by electrical stimulation of the rat dorsal cochlear nucleus

2012 ◽  
Vol 522 (1) ◽  
pp. 16-20 ◽  
Author(s):  
Hao Luo ◽  
Xueguo Zhang ◽  
Javan Nation ◽  
Edward Pace ◽  
Laura Lepczyk ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Nucleus ◽  
Dorsal Cochlear Nucleus ◽  
Stimulation Of

Cisplatin-induced Increases in Spontaneous Neural Activity in the Dorsal Cochlear Nucleus and Associated Outer Hair Cell Loss

2000 ◽  
Vol 39 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Sarah B. Melamed ◽  
James A. Kaltenbach ◽  
Michael W. Church ◽  
Donald L. Burgio ◽  
Chad E. Afmar
Keyword(s):  
Hair Cell ◽  
Neural Activity ◽  
Cochlear Nucleus ◽  
Outer Hair Cell ◽  
Cell Loss ◽  
Dorsal Cochlear Nucleus ◽  
Hair Cell Loss ◽  
Spontaneous Neural Activity

Changes in spontaneous neural activity in the dorsal cochlear nucleus following exposure to intense sound: relation to threshold shift

1998 ◽  
Vol 124 (1-2) ◽  
pp. 78-84 ◽  
Author(s):  
James A Kaltenbach ◽  
Donald A Godfrey ◽  
John B Neumann ◽  
Devin L McCaslin ◽  
Chad E Afman ◽  
...  
Keyword(s):  
Neural Activity ◽  
Cochlear Nucleus ◽  
Dorsal Cochlear Nucleus ◽  
Threshold Shift ◽  
Spontaneous Neural Activity
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