[Pathohistological changes of the superior cervical ganglion after 99.5% ethyl alcohol injection]

The authors attempted to clarify the histological changes of superior cervical ganglion (SCG) cells in chronological order. Adult rat SCGs were injected with ethyl alcohol and were examined under light microscopy after fixation and histological processes. All neurons showed the so-called coagulation necrosis. Inflammatory reactions characterized by cellular invasion were delayed in contrast to ethyl alcohol exposure from outside of the ganglion capsule.