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The Journal of Neuroscience, April 1, 2009, 29(13):4089-4095; doi:10.1523/JNEUROSCI.5393-08.2009

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Behavioral/Systems/Cognitive
Septal Neurons in Barrel Cortex Derive Their Receptive Field Input from the Lemniscal Pathway

Takahiro Furuta,¹ Takeshi Kaneko,^1,2 and Martin Deschênes³

¹Department of Morphological Brain Science, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan, ²Core Research for Evolution Science and Technology, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan, and ³Centre de Recherche, Université Laval Robert-Giffard, Québec City, Canada G1J 2G3

Correspondence should be addressed to Martin Deschênes at the above address. Email: martin.deschenes{at}crulrg.ulaval.ca

Barrel-related circuits in the somatosensory cortex of rodents process vibrissal information conveyed through the lemniscal pathway. Yet, the origin of vibrissal input to interbarrrel regions (septa) remains an unsettled issue. A recurring proposal that never received conclusive experimental support is that septa-related circuits process paralemniscal inputs conveyed through the posterior group of the thalamus. Here we show that the receptive field of septal cells is independent of paralemniscal inputs, and that septal cells derive their receptive field input from neurons in the dorsal part of the thalamic barreloids. This result provides the missing piece of evidence for a separate pathway of vibrissal information that projects to septal columns of the barrel cortex.

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Received Nov. 8, 2008; revised Feb. 16, 2009; accepted Feb. 19, 2009.

Correspondence should be addressed to Martin Deschênes at the above address. Email: martin.deschenes{at}crulrg.ulaval.ca

This article has been cited by other articles:

				C. P. J. de Kock and B. Sakmann Spiking in primary somatosensory cortex during natural whisking in awake head-restrained rats is cell-type specific PNAS, September 22, 2009; 106(38): 16446 - 16450. [Abstract] [Full Text] [PDF]

				S. Chakrabarti and K. D. Alloway Differential Response Patterns in the SI Barrel and Septal Compartments During Mechanical Whisker Stimulation J Neurophysiol, September 1, 2009; 102(3): 1632 - 1646. [Abstract] [Full Text] [PDF]

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