The organization of specific thalamocortical projections to the posteromedial barrel subfield of the rat somatic sensory cortex
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Mapping somatosensory connectivity in adult mice using diffusion MRI tractography and super-resolution track density imaging
2014, NeuroImageCitation Excerpt :The structural composition and connectivity of the “whisker pathways” have been described using 2D histologic and functional activation methods. Network tracking techniques include lesion studies (Killackey and Fleming, 1985; Killackey and Leshin, 1975), carbocyanine dyes (1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate; DiI, DiA) (Kivrak and Erzurumlu, 2013; Seehaus et al., 2013) and myelin staining (Barrera et al., 2012); these techniques are also complemented by Lenti and Adeno-associated viral vector expression of fluorescent proteins (Aronoff et al., 2010; Dittgen et al., 2004; Wimmer et al., 2010). A range of macroscopic to microscopic functional connectivity mapping techniques include functional MRI (Kim et al., 2012; Yang et al., 1996), and 2-photon imaging of electrical activity using voltage-sensitive dyes (Petersen et al., 2003a,b) and channel-rhodopsins to map neuronal connectivity have also been conducted (Paz et al., 2011; Petreanu et al., 2007).
The Balance Between Excitation And Inhibition And Functional Sensory Processing In The Somatosensory Cortex
2011, International Review of NeurobiologyCitation Excerpt :Each barrel is selectively activated by the corresponding whisker on the contralateral whisker pad, and responds only weakly to inputs from surrounding whiskers (Welker, 1971; Welker, 1976; Simons, 1978; Armstrong-James and Fox, 1987; Armstrong-James et al., 1991; Fox, 1994; Moore and Nelson, 1998; Zhu and Connors, 1999). The L4 barrels receive dense inputs exclusively from the thalamic ventro posterior medial (VPM) nucleus (Killackey, 1973; Killackey and Leshin, 1975; Koralek et al., 1988; Chmielowska et al., 1989; Lu and Lin, 1993) and are the first stage of cortical processing for sensory input. Each L4 barrel is composed of a central region of high density neuropil, containing the clustered VPM axonal arborizations, surrounded by a cell-dense wall of L4 neurons that orient their dendritic and axonal arborizations into one specific barrel (Woolsey et al., 1975).
Selective serotonin reuptake inhibitor disrupts organization of thalamocortical somatosensory barrels during development
2004, Developmental Brain ResearchDynamic aspects of cadherin-mediated adhesion in synapse development and plasticity
2002, Biology of the Cell
This research was supported by N.S.F. Grant GB-41294.