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Transmitting Pain and Itch Messages: A Contemporary View of the Spinal Cord Circuits that Generate Gate Control
被引:317
作者:
Braz, Joao
[1
]
Solorzano, Carlos
[1
]
Wang, Xidao
[1
]
Basbaum, Allan I.
[1
]
机构:
[1] Univ Calif San Francisco, Dept Anat, San Francisco, CA 94158 USA
来源:
关键词:
SUPERFICIAL DORSAL-HORN;
SUBSTANTIA-GELATINOSA NEURONS;
PERIPHERAL-NERVE INJURY;
LAMINA-I NEURONS;
CHRONIC CONSTRICTION INJURY;
NEUROKININ;
RECEPTOR;
LASER-SCANNING PHOTOSTIMULATION;
CONTAINING PRIMARY AFFERENTS;
TRIGEMINAL-NUCLEUS-CAUDALIS;
DELTA-OPIOID RECEPTORS;
D O I:
10.1016/j.neuron.2014.01.018
中图分类号:
Q189 [神经科学];
学科分类号:
071006 ;
摘要:
The original formulation of Gate Control Theory (GCT) proposed that the perception of pain produced by spinal cord signaling to the brain depends on a balance of activity generated in large (nonnociceptive)-and small (nociceptive)-diameter primary afferent fibers. The theory proposed that activation of the large-diameter afferent "closes" the gate by engaging a superficial dorsal horn interneuron that inhibits the firing of projection neurons. Activation of the nociceptors "opens" the gate through concomitant excitation of projection neurons and inhibition of the inhibitory interneurons. Sixty years after publication of the GCT, we are faced with an ever-growing list of morphologically and neurochemically distinct spinal cord interneurons. The present Review highlights the complexity of superficial dorsal horn circuitry and addresses the question whether the premises outlined in GCT still have relevance today. By examining the dorsal horn circuits that underlie the transmission of "pain" and "itch" messages, we also address the extent to which labeled lines can be incorporated into a contemporary view of GCT.
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页码:522 / 536
页数:15
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