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Figure 5      Neuronal synchrony dynamics *anesthetized with  isoflurane

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Figure 5      Neuronal synchrony dynamics *anesthetized with  isoflurane

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Firing synchronization of neurons within 100 µm was considerably higher in anesthetized WT mice than in unanesthetized.

In contrast, Firing synchronization of fmr mice neurons were almost unchanged by anesthesia.

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Figure 4   Further causation underling the higher firing rate.

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Figure 4   Further causation underling the higher firing rate.

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The higher firing rates in Fmr mice during Up/Down states were due to more average active Up states ( more spikes) and fewer silent Up states .(Firing probability during Up state was 2 times higher in Fmr mice than WT mice

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Figure 3.         Firing rate of neocortex neurons in two states

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Figure 3.         Firing rate of neocortex neurons in two states

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The result indicates that mice have two different brain states the fast oscillatory activity (FOA)---- normal wakefulness or (REM) sleep states, and the  Up/Down states, which are nonREM sleep or quiet wakefulness.

Frequency histograms according to two states for sampled membrane voltage.(left side)

Neocortex neurons in Fmr mutant mice had 3 times firing rates than WT mice during Up/Down states and same firing rate during activity(FOA states).(right side)

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Figure 2:     Relationship between  the peaks of synchrony and proportion of active  neurons

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Figure 2:     Relationship between  the peaks of synchrony and proportion of active  neurons

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a)Peaks of  neuronal burst activity synchrony (25% of neurons involving)

b)The frequency of peaks of synchrony was slightly higher in Fmr mutant mice at P14–16(postnatal days).

c)The Greater proportion of neurons that participated in synchrony was in Fmr mutant mice than in WT mice.

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Figure 1    Neuronal  activity synchrony  of layer 2/3 in barrel  neocortex 

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Figure 1    Neuronal  activity synchrony  of layer 2/3 in barrel  neocortex 

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Fmr mutant mice showed a higher neuronal synchrony in the postnatal period .