Description

Nerve: Superior cervical ganglion (sympathetics)

Action: Pupil dilation

Antagonist: Iris sphincter muscle

Description:
The radiating muscular fibers of the iris form the Dilatator pupillae; they converge from the circumference toward the center, and blend with the circular fibers near the margin of the pupil.


Text by Antoine Micheau, MD - Copyright IMAIOS

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