Taste and Smell
Age Related Changes in Perception of Flavor and Aroma
It has been posited that the perception of flavor and aroma are derived from the senses of chemical irritation, taste and smell (Rawson, 2003).
Together, these senses constitute what has been termed chemosensation, although these sensory systems are purportedly considerably variant in their physiology and anatomy. Nevertheless, they do have the ability to regenerate, and their noted susceptibility to aging and age associated diseases has been noted (Rawson, 2003). It has been reported that nearly one third of all older individuals report dissatisfaction with their sense of smell and taste, and the actual occurrence of sensory loss amongst the elderly is maintained to be even higher (Pelchat, 2001). Furthermore, it has been asserted that age related sensory loss affects both personal safety and quality of life (Rawson, 2003). Moreover, the impact of the loss on the elderly's physical well being and emotional well being should not be underestimated. If older persons are complaining about chemosensory function, it should be taken seriously both for the significance and prevalence to the older individual and as a possible indicator of neurological disorder (Rawson, 2003).
Article Overview
Researchers posit that there are several features of the human sensory system related to smell, taste, and chemical irritation that make them especially susceptible to age and associated disease changes that may lead to deficits in functionality. These features reportedly include long-term exposure to harsh environmental externalities, replacement of receptor cells for taste and smell over the course of the life span, dependence on the ability of stimuli to penetrate through and dissolve in watery protective layers, and dependency on multiple types of receptors which are necessary to perceive the entirety of the sensory spectrum (Rawson, 2003).
Loss within the sensory system has been attributed to changes in structural anatomy such as loss of olfactory receptor cells or taste buds, changes...
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