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Science 19 April 1985:
Vol. 228. no. 4697, pp. 298 - 302
DOI: 10.1126/science.3983631
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Articles

Science, Vol 228, Issue 4697, 298-302
Copyright © 1985 by American Association for the Advancement of Science

articles

Geometrical differences among homologous neurons in mammals

D Purves and JW Lichtman

The dendritic arbors of sympathetic neurons in different species of mammals vary systematically: the superior cervical ganglion cells of smaller mammals have fewer and less extensive dendrites than the homologous neurons in larger animals. This difference in dendritic complexity according to body size is reflected in the convergence of ganglionic innervation; the ganglion cells of progressively larger mammals are innervated by progressively more axons. These relations have implications both for the function of homologous neural systems in animals of different sizes and for the regulation of neuronal geometry during development.


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