Background: Approximately 5% of the general population is affected by functional anosmia. An
additional 15% exhibit decreased olfactory function. Many of these individuals ask ENT-doctors or neurologists
for help. A cornerstone of the counselling process is the assessment of olfactory function. The aim of this work is
to give a differentiated overview about the administration of commonly used psychophysical tests for olfactory and
gustatory function including their normative data. Conclusion: The use of standardized, reliable and validated tools
is mandatory to provide patients with state-of the-art counseling on treatment options.
Keywords: Smell, taste, olfaction, gustation, orthonasal and retronasal olfactory function, normative data.
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