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- W2012506918 abstract "The activity of lumbar spinal dorsal horn lamina I neurons with afferent drive from the sciatic nerve was studied in intact cats and in cats with acute sciatic nerve transection or chronic sciatic nerve transection with neuroma formation. The majority (51 of 75) of neurons recorded in lamina I ipsilateral to a neuroma had no receptive field and could only be identified by their responses to electrical stimulation of the sciatic nerve. The remainder could be activated by the sciatic nerve, but their responses to mechanical stimulation were irregular in comparison to the stable responses of cells recorded in control animals and to the responses of cells contralateral to chronic nerve lesions. Animals with acute nerve transections demonstrated a loss of sciatic nerve-innervated cells with receptive fields except for those cells located on the lateral edge of the dorsal horn, which had normal, proximal receptive fields and response characteristics. In addition, the characteristic somatotopy of lamina I cells was not observed in some cats with chronic neuromata. The mediolateral distribution of cell types indicated that some cells had altered receptive fields following chronic nerve transection. The data presented for lamina I neurons agrees with the observation of spinal cord plasticity first presented for cat dorsal horn cells. Since there is no evidence for a redistribution of intact afferent fibers following chronic nerve transection in adult mammals, the mechanism of altered somatotopy may involve alterations in synaptic efficacy at existing synapses." @default.
- W2012506918 created "2016-06-24" @default.
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- W2012506918 date "1987-05-01" @default.
- W2012506918 modified "2023-09-23" @default.
- W2012506918 title "Altered responses of nociceptive cat lamina I spinal dorsal horn neurons after chronic sciatic neuroma formation" @default.
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- W2012506918 doi "https://doi.org/10.1016/0006-8993(87)91086-9" @default.
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