The non-lemniscal auditory cortex in ferrets: convergence of corticotectal inputs in the superior colliculus.

Frontiers in Neuroanatomy
Victoria M BajoAndrew J King

Abstract

Descending cortical inputs to the superior colliculus (SC) contribute to the unisensory response properties of the neurons found there and are critical for multisensory integration. However, little is known about the relative contribution of different auditory cortical areas to this projection or the distribution of their terminals in the SC. We characterized this projection in the ferret by injecting tracers in the SC and auditory cortex. Large pyramidal neurons were labeled in layer V of different parts of the ectosylvian gyrus after tracer injections in the SC. Those cells were most numerous in the anterior ectosylvian gyrus (AEG), and particularly in the anterior ventral field, which receives both auditory and visual inputs. Labeling was also found in the posterior ectosylvian gyrus (PEG), predominantly in the tonotopically organized posterior suprasylvian field. Profuse anterograde labeling was present in the SC following tracer injections at the site of acoustically responsive neurons in the AEG or PEG, with terminal fields being both more prominent and clustered for inputs originating from the AEG. Terminals from both cortical areas were located throughout the intermediate and deep layers, but were most concentrated in t...Continue Reading

Citations

Mar 19, 2013·Hearing Research·Nicole ChabotStephen G Lomber
Feb 18, 2016·Proceedings of the National Academy of Sciences of the United States of America·Melville J Wohlgemuth, Cynthia F Moss
Nov 23, 2012·The Journal of Comparative Neurology·W Alex FoxworthyM Alex Meredith
Mar 21, 2012·The Journal of Comparative Neurology·Ana C C GiassiLeonard Maler
Apr 8, 2015·The Journal of Comparative Neurology·Jennifer K BizleyAndrew J King
Jul 6, 2016·Frontiers in Neuroscience·David B GreenMerri J Rosen
Nov 4, 2016·The European Journal of Neuroscience·Amy Hammond-KennyFernando R Nodal
May 29, 2018·The European Journal of Neuroscience·Michael LohseAndrew J King
Feb 15, 2020·Cerebral Cortex·Aldis P WeibleMichael Wehr
May 2, 2012·The Journal of Physiology·Fernando R NodalAndrew J King

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BETA
sedation

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TDT system
Neurolucida
StereoInvestigator
SPSS
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