CZ:Ref:Mountcastle 1957 Modality and Topographic Properties of Single Neurons of Cat's Somatic Sensory Cortex

Mountcastle, V.B. (1957), "Modality and Topographic Properties of Single Neurons of Cat's Somatic Sensory Cortex", Journal of Neurophysiology 20 (4): 408–434

Presents "an hypothesis of the functional organization of this cortical area. This is that the neurons which lie in narrow vertical columns, or cylinders, extending from layer II through layer VI make up an elementary unit of organization, for they are activated by stimulation of the same single class of peripheral receptors, from almost identical peripheral receptive fields, at latencies which are not significantly different for the cells of the various layers."