Hot Topics Published: 30 November 2010 Cortical Circuits for Motor Control Patrick L Sheets & Gordon MG Shepherd Neuropsychopharmacology 36, 365–366 (2011) Cite this article ...

Reversing ‘bridges’ have four switches (relay contacts or transistors) and the diagram (right) shows how they work. Because students are using it, it needs to be short-circuit-proof – no possibility ...