Abstract
Choline and acetylcholine were measured in necropsy brain tissue (temporal cortex and caudate nucleus) obtained from elderly, mentally normal hospital cases and established cases of Alzheimer's disease. ACh levels were as expected, extremely low in all cases; in cases with Alzheimer's disease, the ACh level was lower in the temporal cortex but not changed in the caudate compared with normal cases (matched for ages and post-mortem sampling delays). The level of choline in Alzheimer's disease was not significantly different from the normal in either brain region. The choline levels in the human material were, however, substantially and significantly lower than those obtained from young adult rat cerebral cortex which was cooled after death according to the post-mortem temperature decline in the human cadaver.
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