RESPONSES OF MOTONEURONS UNDERGOING CHROMATOLYSIS
نویسندگان
چکیده
منابع مشابه
Responses of Motoneurons Undergoing Chromatolysis
The delayed and asynchronous firing of chromatolytic motoneurons in response to group I afferent volleys is shown to be evoked monosynaptically, there being an abnormally long and variable delay between onset of monosynaptic action and generation of impulse discharge. Intensity of monosynaptic excitatory action is reduced, and considerable variability in the form of successively evoked postsyna...
متن کاملMonosynaptic Reflex Responses of Individual Motoneurons
Individual motoneuron responses to a variety of afferent inputs have been examined. At a given input some motoneurons respond to every trial, some to no trial, and some respond to a certain percentage of trials that is characteristic for the motoneuron at that input. The performance of a motoneuron is expressed by means of a firing index that relates the number of responses to the number of tri...
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Observations have been made upon asphyxial and postasphyxial changes in the electrical responses of motoneurons to antidromic stimulation. Analysis has been aided by the use of a simple method for locating conduction blocks in the circumstances of volume conduction. Asphyxiation has been produced by suspending artificial ventilation. Regular practice has been to restore ventilation immediately ...
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PURPOSE Monkeys reared under conditions of alternating monocular occlusion during their first few months of life show large horizontal strabismus, "A" patterns, and dissociated vertical deviation. "A" patterns manifest as an inappropriate horizontal component in the deviated eye during vertical eye movements (cross-axis movement). The objective of this study was to investigate response properti...
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SOME spinal motoneurons are equipped with recurrent collaterals which arise from the axon near its origin and terminate in association with other neurons of the ventral horn (cf. Cajal, 1909). An impulse that sweeps over the motor axon must also invade its collaterals. Does it then affect the excita-bility of the neurons in association with which the collaterals terminate? Miiller (1835) could ...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1959
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.42.5.931