Extrathalamic ascending projections to physiologically identified fields of the cat auditory cortex.

Hearing Research
E M RouillerF De Ribaupierre

Abstract

The neurons of origin of ascending extrathalamic projections to the auditory cortex were labeled retrogradely with WGA-HRP injected in physiologically identified auditory cortical fields of the cat (anterior (AAF), primary (AI), posterior (PAF) and secondary (AII) fields). After injection in the tonotopically organized auditory cortical fields (AAF, AI and PAF), labeled neurons were distributed in 7 extrathalamic subcortical regions included in one or the other of 2 distinct systems of ascending projections to the neocortex. In the 'diffuse' system of projection, labeled neurons were observed bilaterally in the locus coeruleus, the nuclei of the raphe, the lateral hypothalamus, ipsilaterally in the ventromedial mesencephalic tegmentum and the basal forebrain; in the 'accessory sensory' system of projection, labeled neurons were found ipsilaterally in the nucleus of the brachium of the inferior colliculus and bilaterally in the claustrum. After injection in AII, labeled neurons were seen only in the 'diffuse' system of projection. For AAF and AI, the major contribution to the total extrathalamic ascending input originated from the lateral hypothalamus, whereas for AII it was the locus coeruleus. In contrast, PAF received extrath...Continue Reading

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Citations

Nov 5, 2004·Anatomy and Embryology·Susanne Radtke-SchullerWilliam E O'Neill
Oct 29, 2002·Neuroscience·V V Senatorov, B Hu
Jul 22, 2009·Hearing Research·John F Smiley, Arnaud Falchier
Jun 28, 2006·The Journal of Comparative Neurology·Mercedes PeralesJorge J Prieto
Apr 21, 2007·The Journal of Comparative Neurology·John F SmileyCharles E Schroeder
Aug 28, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Diana K SarkoRoger L Reep
Aug 19, 2007·Journal of Neurophysiology·Mark N WallaceAlan R Palmer
Jun 16, 2017·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Meichan ZhuAnzhou Tang
Dec 1, 1990·The Journal of Comparative Neurology·P Arnault, M Roger

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