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During the late 1970s, ethchlorvynol was sometimes over-prescribed causing a minor epidemic of persons who quickly became addicted to this powerful drug. Elvis Presley was quite fond of Placidyl, Supreme Court Justice William Rehnquist had to be hospitalized for detox of Placidyl, as was Steven Tyler of Aerosmith. |
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The correlation coding model of neuronal firing claims that correlations between action potentials, or "spikes", within a spike train may carry additional information above and beyond the simple timing of the spikes. Early work suggested that correlation between spike trains can only reduce, and never increase, the total mutual information present in the two spike trains about a stimulus feature.[51] However, this was later demonstrated to be incorrect. Correlation structure can increase information content if noise and signal correlations are of opposite sign.[52] Correlations can also carry information not present in the average firing rate of two pairs of neurons. A good example of this exists in the pentobarbital-anesthetized marmoset auditory cortex, in which a pure tone causes an increase in the number of correlated spikes, but not an increase in the mean firing rate, of pairs of neurons.[53] |
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autism |
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