Acute Sleep Deprivation Reduces Oscillatory Network Inhibition In The Young Rat Basolateral Amygdala

We examined whether a sleep deprivation (SD) alters the properties of the network inhibition by whole-cell recordings from BL projection neurons and interneurons of the slice preparation of the juvenile rats. The level of the oscillatory network inhibition, measured as summed power of the spectral density between 0.1 and 3 Hz of the synaptic currents in the projection neurons, was significantly attenuated by acute (3 h) SD in older (P20–24) but not in younger (P15–19) animals. This reduction was mainly derived from the reduced peak amplitude of periodic IPSC bursts. In inhibitory interneurons in BL, spontaneous firings were reduced in older SD rats. The spike threshold of interneurons was increased and the power of the periodic excitatory transmission was reduced in the SD rats. Moreover, a reduction in input resistance in projection neurons was observed in SD rats without significant difference in the excitability which was measured by the spike number induced by depolarizing currents. These results suggest that sleep deprivation stress affects the network oscillatory property accompanied by changes of individual neuronal excitability and synaptic communications.
Source: Neuroscience - Category: Neuroscience Source Type: research