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Altered Nociceptive Neuronal Circuits After Neonatal Peripheral Inflammation
M. A. Ruda,*Qing-Dong Ling,Andrea G. Hohmann,Yuan
Bo Peng,Toshiya Tachibana
Nociceptive neuronal circuits are formed during
embryonic and postnatal times when painful stimuli are normally absent
orlimited. Today, medical procedures for neonates with health riskscan involve tissue injury and pain for which the long-term effectsare
unknown. To investigate the impact of neonatal tissue injuryand pain
on development of nociceptive neuronal circuitry, weused an animal
model of persistent hind paw peripheral inflammation.We found that, as
adults, these animals exhibited spinal neuronalcircuits with increased
input and segmental changes in nociceptiveprimary afferent axons and
altered responses to sensory stimulation.
Cellular Neuroscience Section, Pain and Neurosensory Mechanisms
Branch, National Institute of Dental and Craniofacial Research,
National Institutes of Health (NIH), Bethesda, MD 20892, USA.
*
To whom correspondence should be addressed. E-mail:
maruda{at}dir.nidcr.nih.gov
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