Title | Creator | Description | Identifier | ||
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1 | The Pupil in Clinical Diagnosis | Thomas J. Zweifel, DO; H. Stanley Thompson, MD | The muscle fibers in the iris which regulate pupil size are innervated by sympathetic and parasympathetic divisions of the autonomic nervous system. The sphinctel; a 1 mm circular band at the pupillary margin, is under parasympathetic control and is activated in response to light stimuli or during a... | 19800220_nanos_varsubjectssympos1_05 |