Anosmia and Olfactory Dysfunction: Insights into Neurological and Sensory Disorders

Anosmia the loss of smell-impacts quality of life significantly in terms of nutrition, safety, and emotional well-being. Olfaction is a complex chemosensory process involved in several activities of daily living, from the detection of environmental threats to enhanced enjoyment of food and social interplays. This review studies the epidemiology, prevalence, and physiological mechanisms related to olfactory dysfunction, including functions of olfactory neurons and neurogenesis. Anosmia with respect to aging, neurodegenerative diseases, viral infections, and environmental factors often indicates its clinical importance. To address this, psychophysical, electrophysiological, imaging, and biochemical studies are performed in order to assess olfactory function. Although emerging research has increased, gaps still remain in the treatment and management of anosmia. Future directions emphasize neuroplasticity, olfactory training, biomarker discovery, genetic therapies, and the psychosocial impact of anosmia. Understanding anosmia as an early sign for neurodegenerative diseases allows for enhanced diagnostic and therapeutic approaches, providing substance for interdisciplinary research on olfactory dysfunction.