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首页> 外文期刊>Journal of Neurophysiology >Fiber types contributing to dorsal root reflexes induced by joint inflammation in cats and monkeys.
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Fiber types contributing to dorsal root reflexes induced by joint inflammation in cats and monkeys.

机译：纤维类型有助于猫和猴子的关节发炎引起的背根反射。

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摘要

1. Injection of kaolin and carrageenan into the knee joint of cats or monkeys resulted in an acute inflammation. Four hours after injection of the knee joint, efferent activity could be evoked in articular afferent fibers and in dorsal root filaments. We interpret this efferent activity to be dorsal root reflexes (DRRs). Under our experimental conditions, the DRRs were generally synchronized compound action potentials, although in some cases single-unit activity was also observed. 2. DRRs were not produced in animals with uninflamed knee joints and normal body temperatures. 3. Recordings from two different sites on cut dorsal root filaments ipsilateral to the inflamed knee joint allowed the determination of the conduction velocities of groups of afferent fibers carrying DRRs. The DRRs occurred in A beta-, A delta-, and C fibers. However, in these experiments the peripheral destination of the afferent fibers was unknown. 4. To prove that DRRs occurred in joint afferents, recordings were made from two different sites on the proximal stump of the medial articular nerve that innervated the inflamed knee. The DRRs were again found in all fiber types, i.e., group II, III, and IV (A beta, A delta, and C) articular afferent fibers. 5. Compound DRRs were recorded from the central end of a cut dorsal root filament after electrical stimulation at C fiber intensity of a dorsal root adjacent to the filament. This DRR activity was eliminated by extensive dorsal rhizotomies of the L2-S1 roots.(ABSTRACT TRUNCATED AT 250 WORDS)
机译：1.将高岭土和角叉菜胶注入猫或猴子的膝盖关节会导致急性炎症。膝关节注射后四小时，关节传入纤维和背根细丝可引起传出活动。我们将这种传出活动解释为背根反射（DRRs）。在我们的实验条件下，DRR通常是同步的复合动作电位，尽管在某些情况下也观察到了单单位活性。 2.膝关节未发炎且体温正常的动物未产生DRR。 3.从发炎的膝关节同侧切开的背根细丝上两个不同部位的记录，可以确定携带DRRs的传入纤维组的传导速度。 DRR发生在Aβ，A和C纤维中。然而，在这些实验中，传入纤维的外围目的地是未知的。 4.为了证明DRRs发生在关节传入神经中，记录了支配发炎膝盖的内侧关节神经近端残端上两个不同的位置。在所有纤维类型，即II，III和IV组（A beta，A delta和C）关节传入纤维中也再次发现了DRR。 5.在电刺激之后，从切开的背根细丝的中心端记录邻近根丝的C纤维强度的化合物DRR。通过广泛的L2-S1根部背侧根除术消除了这种DRR活性（摘要以250字截断）

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