Insulin and its A and B chain increased the quantity of intracellular PAS-positive material (glycogen) in tetrahymena, whereas the combined A + B chains decreased it. Imprinting--previous interaction-with insulin, its A and B chains in themselves and with the A + B chain increased the hormone binding capacity of tetrahymena, but the functional effect of imprinting (storage or breakdown of glyco...

Repetitive pairing of a peripheral stimulation with a magnetic transcortical stimulation (PAS) is widely used to induce plastic changes in the human motor cortex noninvasively. Based on the contrast between PAS-induced increase of corticospinal excitability and absence of PAS-induced increase of the spinal F wave size, it has been generally accepted that PAS-induced plasticity is cortical in or...