Figure 8. Diagram of signal flow within loops that encompass vM1 cortex in the vibrissa sensorimotor system.
We shown only the subset of sensorimotor pathways that encompass the known flow of spike-based signaling in the rodent (Chakrabarti and Alloway, 2006; Kleinfeld et al., 2006; Urbain and Deschênes, 2007); the diagram is thus incomplete, especially with regard to basal ganglia (Hoffer et al., 2005) and cerebellar circuits (Lang et al., 2006; O'Connor et al., 2002). Minus signs mark inhibitory pathways. The brainstem nuclei include a hypothetical central pattern generator. Symbols: VPM, ventral posterior medial thalamus; PO, posterior medial thalamus, ZIvmot and ZLvvib, motor and vibrissa subdivision, of ventral zona incerta, respectively. Functional projections are labeled in blue.