A. Ishihara et al., COMPARISON OF SUCCINATE-DEHYDROGENASE ACTIVITY AND SOMA SIZE RELATIONSHIPS AMONG NEURONS IN DORSAL-ROOT GANGLIA OF RATS AND CATS, Brain research, 716(1-2), 1996, pp. 183-186
Compared to dorsal root ganglion (DRG) neurons at L(5) in rats, DRG ne
urons at L(7) in cat have a larger mean soma size, a bimodal rather th
an unimodal distribution of sizes and lower succinate dehydrogenase (S
DH) activities for neurons of all sizes. In contrast to spinal motoneu
rons in both cats and rats, the larger DRG neurons have the higher SDH
activities. The 10-20% higher SDH activity of DRG cells in rats than
in cats may reflect, in part, a species difference of about 40% in met
abolic rates.