Abstract
The application of a number of enzyme and other histochemical tests, and of cytological techniques to rat spinal ganglion cells has demonstrated a wide range in intensity and distribution of these reactions in individual cells. Since all stages between one type of intensity and distribution and another can be seen it is suggested that the spinal ganglion cells undergo continuous metabolic cycles which are related possibly to the synthesis of protein, acetyl choline, cholinesterase and perhaps other enzymes and compounds.