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- W1967454994 abstract "This study looks into the relationship between the effects of acetylcholine on single neurons in the sensorimotor cortex of cats and the synaptic transmission of impulses to these neurons from the mesencephalic reticular formation. The effects of general anesthesia on the neuronal responses to drugs and to synaptic stimulation were avoided by using ence´phale isole´preparations; because the neuronal firing in these preparations fluctuates as it does in normal cats, long periods of recording were obtained and analyzed by the computation of histograms of the distribution of action potentials. The iontophoretic application of acetylcholine from extracellular multibarreled micropipettes increased the firing rate of about one-third of 103 neurons studied and decreased it in about one-sixth of them. Repetitive electrical stimulation of the reticular formation produced unsustained, multiphasic, or sustained changes of firing in many neurons; initial excitation was more common than initial depression. Many neurons reacted by excitation to both acetylcholine and reticular stimulation, but some neurons were depressed by acetylcholine and excited by reticular stimulation, while others were excited by acetylcholine and depressed by reticular stimulation, and still other neurons were depressed by both agents. Atropine and scopolamine, which antagonized the effects of acetylcholine, also blocked the excitatory responses to reticular stimulation in some acetylcholine-excited neurons. However, the depressant effects of reticular stimulation were not antagonized by these agents. These results support the assumption that acetylcholine acts as a synaptic transmitter of the excitatory responses to reticular stimulation in some of the neurons in the sensorimotor cortex." @default.
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- W1967454994 date "1974-07-01" @default.
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- W1967454994 title "The effects of acetylcholine and of synaptic stimulation on the sensorimotor cortex of cats. I. neuronal responses to stimulation of the reticular formation" @default.
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- W1967454994 doi "https://doi.org/10.1016/0006-8993(74)90580-0" @default.
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