筋紡錘の求心性発射活動に対する前庭迷路の影響

抄録

The labyrinthine influences on muscle spindle activity were studied on decerebrated cats by recording single spindle discharges from ankle flexor and extensor muscles. Fluctuation of gamma activity by rotatory accerelatory stimulation was revealed. Effects of unilateral labyrinthectomy and spinal transection was also observed.
Following conclusions were obtained from these experiments:
1) The labyrinth exerts influences of two different types upon spindle activity by rotatory stimulation; one is non-reciprocal facilitatory influence and the other is reciprocal one.
2) The labyrinth exerts ipsilaterally non-reciprocal facilitatory effects.
3) The labyrinthine reciprocal influence conducts unilaterally from both labyrinths in rotatory stimulation.
4) Impulses conducting the labyrinthine reciprocal influence descend along lateral part of the ipsilateral spinal cord, probably along the reticulo-spinal pathway.