... to the reticular activating system via the reticular formation, beginning in the medulla and extend-ing to the midbrain. This pathway links the brain withperception of external events. Pain ... levels and a minimum of 2days to achieve a steadystate concentration, making this route ponderous for acutecare use [91]. Unfortunately, clonidine is not yet approved for intravenous use in the USA, ... memory,working memory, memory indexing/storage, relatingexpectancy to reality, and internal inhibition. Memory isrecorded in several parts of the brain at same time as‘memory molecules’ for...