ISSN:
1573-8221
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Experiments on cats under nembutal anesthesia were used to study the summary afferent impulse flux in fiber bundles of the posterior roots at the level T3−T7, at the normal level and at an excessive intrapulmonary pressure. Normally, volley activity either in inspiration or in expiration was registered in the majority of cases. Under conditions of an excess intrapulmonary pressure the volleylike respiratory character of the activity was retained. In the inspiratory fiber bundles the summary electrical activity during inspiration increased at the expense of growing activity of available units and appearance of new ones. However, during arrest of respiratory with an excessive intrapulmonary pressure, no activity in the inspiratory fiber bundles was noted. In the expiratory fiber bundles the activity mainly reduced and disappeared in the excessive intrapulmonary pressure, the appearance of new expiratory units being noted at the same time. It is supposed that the afferent activity of the muscle spindles, for which γ-activation plays an important role, was mainly registered in the fiber bundles of the posterior roots.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00805264
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