Fig. 9

Correlation of c-Fos expression between neurons in IC and orexin neurons during FAA. The number of c-Fos-orexin double-positive neurons in LH of the 8 days RF mice (n = 10) and their control AL mice (n = 10), and 15 days RF mice (n = 10) and their control AL mice (n = 10) are shown on the x-axis, respectively. The number of c-Fos positive neurons in AI, MI and PI in IC of the 8 days RF mice (n = 10) and their control AL mice (n = 10), and 15 days RF mice (n = 10) and their control AL mice (n = 10) are shown on the y-axis, respectively. Data of total IC are the sum of AI, MI and PI. RF-mice showed a significant positive correlation between the number of neurons activated in AI or MI or PI or total IC and the number of orexin neurons activated in LH (P < 0.001), but AL-mice did not (P > 0.05) according to Pearson's correlation coefficient