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LOUIS T. PALUMBO, M.D.

AMA Arch Surg. 1955;71(5):743-751.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The sympathetic pathways to the muscles of the iris concerned with pupillary action have been described by many investigators both in animals and in man.* It has been generally agreed that the cell bodies of the preganglionic neurons are in the eighth cervical and the first and second thoracic (dorsal) levels of the spinal cord. The greatest number apparently are found at the first thoracic level. These preganglionic neurons leave the spinal cord, as recorded in the literature surveyed, mainly by way of the first and second thoracic ventral roots and enter the sympathetic chain at these levels via the rami communicantes. They pass cephalad through the inferior cervical or the stellate ganglion (a fusion of the first thoracic with the inferior cervical ganglion) to synapse with the postganglionic neurons located in the superior cervical ganglion. These latter fibers then pass via the carotid vessels or nasociliary nerves to the . . . [Full Text PDF of this Article]

Author Affiliations
Des Moines

From the Department of Surgery, Veterans Administration Hospital.

Footnotes
Submitted for publication Jan. 10, 1955.

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