TEM images of the amygdala in SPS rats. TEM images of the amygdala. A: Normal control amygdala neuron, displaying abundant organelles such as mitochondria, endoplasmic reticulum, and ribosomes. The nucleus is large and round, density of chromatin is uniform, and nucleolus is clear. B: Chromatin condensation (shown with arrow) and nucleolus disappearance (shown with star) is shown in the amygdala cells of SPS 7 day rats. C: The mitochondria showed swelling, vacuolation and loss of crest (shown with arrowhead) in cells of the amygdala from SPS 7 day rats. Scale bar, 300 nm.