1. Field potentials and single unit discharges were recorded in the dorsal accessory olive of the cat following stimulation of nerves of the contralateral hind limb.2. The largest field potentials were evoked when nerves were stimulated with brief trains at 200-300/sec. Responses were sometimes evoked from quadriceps nerve by volleys restricted to low threshold group I afferents, but responses were not usually evoked from other muscle nerves unless both group I and II afferents were excited.3. The spatial distributions of the field potentials evoked from different nerves were very similar and individual units were made to discharge by stimulation of each of a wide range of nerves including muscle, skin and joint nerves. Single units were also made to discharge by stimulation of both the ipsilateral and the contralateral quadriceps nerve.4. The latency of the field potentials evoked by stimulation of quadriceps nerve ranged from 14 to 23 msec in different preparations. The latency of responses evoked from various branches of the sciatic nerve was consistently longer and was usually between 20 and 30 msec.5. The activity was conveyed by a tract which, at the upper lumbar level of the spinal cord, lay in the ventral quadrant ipsilateral to the olive. In the upper cervical region the tract lay close to the ventral surface of the cord. Values between 24 and 30 m/sec were found for the conduction velocity of the tract.6. An excitatory response in the dorsal accessory olive was followed by a period of about 100 msec during which the amplitude of a second response was reduced.
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机译:1.刺激对侧后肢神经后,在猫的背橄榄中记录了电场势和单个单位放电。当以200-300 / sec的短暂训练刺激神经时,会激发出最大的野外潜能。有时由限制在低阈值的I组传入者的抽空引起四头肌神经的反应,但除非I和II组传入者都兴奋,否则通常不会从其他肌肉神经引起反应。3。不同神经引起的场电位的空间分布非常相似,并且通过刺激包括肌肉,皮肤和关节神经在内的各种神经来使单个单位放电。还通过刺激同侧和对侧四头肌神经使单个单位放电。4。在不同的准备工作中,通过刺激股四头肌引起的场电位潜伏期为14到23毫秒。坐骨神经各分支引起的反应潜伏期持续较长,通常在20至30毫秒之间。5。该活动是通过一条管道进行的,该管道在脊髓的上腰水平处位于橄榄同侧的腹侧象限。在上颈部区域,呼吸道靠近脐带的腹面。发现该管道的传导速度为24至30 m / sec之间的值6。在背附生橄榄中发生兴奋性反应,其后约100毫秒,在此期间第二反应的幅度降低。
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