|
KMID : 0376219710080010065
|
|
Chonnam Medical Journal
1971 Volume.8 No. 1 p.65 ~ p.74
|
|
|
Effect of electrical stimulation of utricular and deep peroneal nerves upon stretch-tension of the triceps surae in rabbits
|
|
Han Pyung-Ok
|
|
|
Abstract
|
|
|
It has been demonstrated that both vestibular and the other proprioceptive systems are active in regulation of posture and movement impulses arising from multiple sources converge and interact to influence the activity of the final common pathway. However, the mode of interaction of these signals at spinal or supraspinal level is not clearly elucidated.
Sherrington(1908) indicated that different inputs could interact in reflex system in an additive or subtractive manner. Magnus(1926) stated that the tone of muscle in decerebrate cats depends upon the algebraic sum of influences derived from various proprioceptive end organs. Koella et al. (1956) studied interrelation between stretch-tension and fixed position of the animal, and they concluded that the vestibular apparatus and muscle spindles exert influences in quantitatively interdependent manner. Kim and Partridge (1969) also demonstrated such interdependent action between vestibular and spindle afferent inputs on gastrocnemius muscle-tension in decerebrate cats.
In an attempt to observe the mode of interaction of multiple impulses from different origins, decerebrate rabbits were subjected to three independent inputs, stretch of triceps surae, electrical stimulation of the utricular nerve and peroneal or cutaneous nerve, and one output, reflex tension of the muscle,: was examined. The left vestibular canals were exposed and a minute hole was, provided on the horizontal canal through this hole, fine insulated electrode was inserted closely to the utricular nerve and fixed for monopolar stimulation. A force position recording system was mounted on a spring dash-pot muscle stretching device, and by means of this mechanical system the left triceps surae was stretched and length-tension relationship was automatically recorded. Left utricular nerve stimulation was initiated during the muscle stretch and sustained until the end of the Stretch. In the ipsilateral hindlimb, electrical stimulation of central end of peronea or cutaneous nerve was added to the utricular nerve stimulation. From these experiments following results were obtained.
1. Electrical stimulation of utricular nerve increases the stretch-tension of the triceps surae.
2. When stimulation of superficial peroneal nerve(mixed nerve) is added to the stimulation of utricular nerve, the stretch-tension of the muscle is further augmented than the tension increase by the stimulation of only utricular nerve.
3. Stimulation of inferior sural cutaneous nerve markedly augmented the effect of utricular nerve stimnlatiou on the stretch-tension of the muscle.
4. Stimulation of deep peroneal nerve branch from the tibialis, anterior(an antagonistic muscle) has little influence on the stretch-tension of the triceps surae. If stimulation of .the nerve is added to the utricular nerve stimulation the tension increment demonstrable by only utricular stimulation is markedly reduced.
5. In all experiments, when the stretch tension of the triceps surae was influenced by the inputs, the slopes of the length-tension relationships were definitely altered such effect of changing slopes of the length-tension curve suggests mode of multiplicative interaction of various impulses originating from different end organs.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|