Carbonic anhydrase enzyme histochemistry of cranial nerve primary sensory afferent neurons in the rat

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Abstract
Hansson's enzyme histochemical method for the demonstration of carbonic anhydrase has been used to examine primary sensory neurons of cranial nerves in the rat (cochlear ganglion cells excluded). Numerous carbonic anhydrase positive neurons were present in the trigeminal and geniculate ganglia as well as in the mecencephalic trigeminal nucleus. A few carbonic anhydrase positive ganglion cells were found in the nodose ganglion, but none in the petrosal and vestibular ganglia. However, in the latter ganglia, satellite cells surrounding the neurons frequently showed staining for carbonic anhydrase.