Liss1 studied the histology of the olfactory bulb and extracerebral part of the tract in a number of postmortem specimens from persons ranging in age from 18 months to 80 years, by means of a silver-carbonate stain. He found four distinctly outlined layers: fila olfactoria, glomeruli, ganglion cells, and olfactory tract fibers. Seven different types of neurons were described in the bulb and three in the tract. Structures not previously described were demonstrated. These are the synaptic structures in the glomeruli, minute neurons in the ganglionic layer, and bipolar ganglion cells in the olfactory tract.
Degenerative changes in the neurons were not found in the older specimens, although an increase of the astroglia and corpora amylacea commonly seen in the senile brain were present.
Liss,2 again employing the silver-carbonate staining technique of del Rio Hortega as modified by Sibarenberg and the author, reports further observations in a number
SALINGER S. The Paranasal Sinuses: Summaries of the Bibliographic Material Available for 1955-1956. AMA Arch Otolaryngol. 1958;68(2):217–262. doi:10.1001/archotol.1958.00730020225016
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