MECHANICAL SENSITIVITY OF GROUP-III AND GROUP-IV AFFERENTS FROM POSTERIOR ARTICULAR NERVE IN NORMAL AND INFLAMED CAT KNEE
MECHANICAL SENSITIVITY OF GROUP-III AND GROUP-IV AFFERENTS FROM POSTERIOR ARTICULAR NERVE IN NORMAL AND INFLAMED CAT KNEE
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DOI：
10.1152/jn.1986.55.4.635
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发表时间：
1986-04-01
影响因子：
2.5
通讯作者：
SCHMIDT, RF
中科院分区：
文献类型：
--
作者：
GRIGG, P;SCHAIBLE, HG;SCHMIDT, RF
在28只猫的坐骨神经或背根细丝上记录了通过后关节神经（PAN）供应膝关节的单个III组（传导速度2.5-20 m/s）和IV组（传导速度小于2.5 m/s）单位。其中7只猫的膝关节被人为地发炎。从坐骨神经细丝的记录显示，只有3的41组IV单位和12的18组III单位从正常关节的关节局部机械刺激的反应。在炎症关节中，36个IV组单位中的14个和36个III组单位中的24个被局部机械刺激兴奋。在背根细丝（正常关节）的记录中，11个IV组单位中的4个和13个III组单位中的7个通过局部刺激关节而被激活。在正常的联合四组IV单位（记录从背根丝）只对旋转对组织的阻力，而大多数的纤维没有反应，甚至有力的运动。第三组单位与当地mechanosensitivity在正常的关节反应强烈或微弱的运动在工作范围内的联合或只对运动的组织的阻力。在发炎的关节，第四组纤维（记录在坐骨神经丝）与可检测的感受野反应强烈，温和的运动或只对运动的组织阻力。有些人对运动没有反应。第三组单位反应强烈或微弱，以温和的运动或只对运动的组织阻力。（250字处删节）
Recordings were performed from sciatic nerve or dorsal root filaments in 28 cats to study single group III (conduction velocity 2.5-20 m/s) and group IV (conduction velocity less than 2.5 m/s) units supplying the knee joint via the posterior articular nerve (PAN). In seven of these cats the knee joint had been inflamed artificially. Recordings from sciatic nerve filaments revealed responses to local mechanical stimulation of the joint in only 3 of 41 group IV units and in 12 of 18 group III units from the normal joint. In the inflamed joint 14 of 36 group IV units and 24 of 36 group III units were excited with local mechanical stimulation. In recordings from dorsal root filaments (normal joint) 4 of 11 group IV units and 7 of 13 group III units were activated by stimulating the joint locally. In the normal joint four group IV units (recorded from dorsal root filaments) responded only to rotations against the resistance of the tissue, whereas the majority of the fibers did not respond even to forceful movements. Group III units with local mechanosensitivity in the normal joint reacted strongly or weakly to movements in the working range of the joint or only to movements against resistance of the tissue. In the inflamed joint, group IV fibers (recorded in sciatic nerve filaments) with detectable receptive fields responded strongly to gentle movements or only to movements against resistance of tissue. Some did not react to movements. Group III units reacted strongly or weakly to gentle movements or only to movements against resistance of the tissue.(ABSTRACT TRUNCATED AT 250 WORDS)