Journal of Yeungnam Medical Science

Sung Hee Kim

2 Articles

Approach to pupillary abnormalities via anatomical pathways: Sung Hee Kim; Yeungnam Univ J Med. 2017;34(1):11-18. Published online June 30, 2017; DOI: https://doi.org/10.12701/yujm.2017.34.1.11

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The pupillary size and movement are controlled dynamically by the autonomic nervous system; the parasympathetic system constricts the iris, while the sympathetic system dilates the iris. Under normal conditions, these constrictions and dilations occur identically in both eyes. Asymmetry in the pupillomotor neural input or output leads to impaired pupillary movement on one side and an unequal pupil size between both eyes. Anisocoria is one of the most common signs in neuro-ophthalmology, and the neurological disorders that frequently cause anisocoria include serious diseases, such as vascular dissection, fistula, and aneurysm. A careful history and examination can identify and localize pupillary disorders and provide a guide for appropriate evaluations.

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The Effects of Anticholinesterase Drugs on Gastric Motility.: Hyoung Chul Choi, Jong Ho Kim, Jeoung Hee Ha, Kwang Yoon Lee, Won Joon Kim, Dong Suk Kwak, Sung Hee Kim, Phil Hyun Song, Ji Hyun Yeo; Yeungnam Univ J Med. 1999;16(2):318-325. Published online December 31, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.2.318

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Abstract PDF: BACKGROUND
Anticholinesterase drug inhibits acetylcholinesterase(AChE), induce accumulation of acetylcholine(ACh) near cholinergic receptors and cholinergic stimulation. This experiment was performed to study the effects of anticholinesterase drugs on gastric motility and the effect of ethanal on anticholinesterase drug-induced motility change. MATERIALS AND METHODS: After excision of stomach, 2x10mm circular musele strips were made, which were then fixed to the isolated muscle chamber. An isometric tension transducer was used to measure the contraction change of the gastric smooth muscle strips after drug addition. RESULTS: Fenthion, and irreversible anticholinesterase drug, increased ACh induced contraction of gastric smooth muscle strips and PAM, a cholinesterase activator, antagnized this action. Physostigmine, a reversible anticholinesterase drug, also increased the ACh induced contraction. The gastric motility was decreased by PAM. Ethanol, which is known to induce smooth muscle relaxation, inhibited the increase of contraction by fenthion. CONCLUSION: These results indicate that irreversible and reversible anticholinesterase drugs increase gastric motility and antagonized by cholinesterase activating drugs. And when exposed to both ethanol and anticholinesterase drug, gastric motility was decreased by the smooth muscle relaxation effect by ethanal.

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