Olfactory system

The **olfactory system** is the sensory system responsible for the detection of odorants (smell) in the environment. It comprises peripheral elements (such as the olfactory epithelium, sensory neurons, and olfactory nerves) and central processing centers (including the olfactory bulb and higher brain regions). Odorant molecules are detected by olfactory sensory neurons via olfactory receptors in the nasal cavity, with signals ultimately transmitted through the olfactory nerves to the olfactory bulb and further brain regions that process smell. The system is essential for chemosensory perception, quality of life, and some survival behaviors. It is not a single protein, receptor, or drug target, but rather a complex functional network comprising many molecular targets—including several hundred different olfactory receptor proteins, ion channels, signaling proteins, and axonal guidance molecules[3][4][1][5]. As such, “olfactory system” as a target is too broad and nonspecific to map to a canonical molecular target suitable for drug discovery or biomarker purposes. Key issues: - “Olfactory system” is not a single molecule or receptor and does not fit the definition of a canonical drug target, such as a receptor, enzyme, transporter, or ion channel[3][4]. - The system contains hundreds of molecular targets (e.g., many olfactory receptor proteins), but the name itself is anatomical/functional, not molecular or gene-specific[3][4]. - For structured information as required, you must specify a particular molecular target within the olfactory system, such as a specific olfactory receptor (e.g., “Olfactory receptor 1A1”), the olfactory nerve, or relevant signaling molecules like Neuropilin-1 or Robo family proteins[1][4].

Other names

Olfactory senseOlfactionChemosensory system (when referenced with taste)