Organization of feedback and feedforward projections of the barrel cortex: a PHA-L study in the mouse

Experimental Brain Research
E WelkerH Van der Loos

Abstract

In order to analyze the organization of the efferent projections of single barrel columns (BC, i.e. a barrel in layer IV of parietal cortex plus the cortical tissue above and below it), we made small iontophoretic injections of the anterograde tracer Phaseolus vulgaris leucoagglutinin in the barrel cortex of 20 adult mice. On the basis of reconstructions of the sites of terminal labelling, the brain regions receiving projections from the barrel cortex could be identified and classified in five groups. Each group is characterized by the topography of the distribution of efferents arising from a single BC. The projections to the trigeminal sensory complex are point to point: i.e. one BC projects only to the site of termination of the primary sensory neurons innervating the corresponding whisker follicle. In the ventrobasal thalamic nucleus BC projections are not restricted to the corresponding barreloid; instead they contract parts of barreloids belonging to one arc. In the reticular and posterior thalamic nuclei the projections from a row of BC's converge to a collective termination site, whereas in the superior colliculus the projections from an arc of BC's converge to a common termination site. There is a complete overlap of B...Continue Reading

Citations

Jun 1, 2006·Pflügers Archiv : European journal of physiology·Michael BrechtPavel Osten
May 6, 2011·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Safiye ÇavdarFiliz Onat
Jul 2, 2011·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Safiye CavdarFiliz Onat
Jun 25, 2013·Behavioural Brain Research·A Cybulska-KlosowiczM Kossut
Jan 1, 1990·Neuroscience and Biobehavioral Reviews·J P HustonR K Schwarting
Feb 17, 2001·Brain Research Bulletin·E M Rouiller, E Welker
Dec 14, 2004·Proceedings. Biological Sciences·Ben MitchinsonTony J Prescott
Nov 27, 2009·Journal of Neurophysiology·Nicholas Wright, Kevin Fox
Dec 5, 2008·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Ron D FrostigJimmy Stehberg
May 14, 2014·Annual Review of Neuroscience·Carl C H Petersen
Aug 11, 2011·PloS One·Izabela M ZakiewiczJan G Bjaalie
Apr 7, 2006·The International Journal of Neuroscience·Jan G BjaalieChristian Pettersen
Jan 1, 1990·Somatosensory & Motor Research·M F JacquinR W Rhoades
Jan 30, 2016·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·J EversJ F X Jones
Sep 8, 1990·The Journal of Comparative Neurology·K A KoralekH P Killackey
Jan 8, 1990·The Journal of Comparative Neurology·K L BernardoR N Strominger
Oct 30, 2004·The Journal of Comparative Neurology·Kevin D AllowayShubhodeep Chakrabarti
Apr 19, 2005·The Journal of Comparative Neurology·Craig E Brown, Richard H Dyck

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Barrel cortex

Here is the latest research on barrel cortex, a region of somatosensory and motor corticies in the brain, which are used by animals that rely on whiskers for world exploration.