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q-GI - hipp
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12-20-2007, 01:48 PM
Increase in which of the following causes Cushing ulcer following a brain hemorrhage:
1) pepsin 2) H2 stimulation 3) cck production 4) acid absorption 5) M1 block
12-20-2007, 02:33 PM
2-h2 stimulation
exact mechanism behind the development of Cushing™s ulcer from raised intracranial tension s a matter of debate. raised intracranial tension stimulates the vagus nerve. This vagus nerve or 10th cranial nerve controls the acid secretion from the stomach. So, when vagus nerve is stimulated, it reflexly stimulates the acid secreting cells of the stomach. This results in excess hydrochloric acid secretion. Gastric and duodenal mucous membrane is damaged in this acidic environment resulting in Cushing™s ulcer.
12-21-2007, 10:13 AM
do u have any explanation? if so plz...... iwas thinking of acid increase(H2 stimu)??
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