The influence of olfactory experience on the birthrates of olfactory sensory neurons with specific odorant receptor identities.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing preclinical mechanistic and animal research without new human data.
PubMed 38888221 · doi:10.1002/dvg.23611
What was done
This narrative review synthesized literature on mammalian olfactory sensory neuron (OSN) neurogenesis. It examined preclinical evidence from olfactory deprivation, enrichment, conditioning paradigms, and injury recovery models to evaluate whether the generation of OSNs expressing specific odorant receptors is strictly stochastic or can be modulated by sensory experience.
What was found
The abstract reports no numerical metrics or statistical values. It summarizes evidence indicating that the birthrates of specific OSN subtypes can be selectively altered by manipulating olfactory experience and that post-injury population recovery shows non-stochastic neurogenesis patterns.
Why it matters
If olfactory sensory neurogenesis is regulated by specific olfactory experience rather than purely stochastic replacement, neurogenesis serves an active adaptive role in tuning sensory perception to the environment.
Limits
The abstract describes a narrative review without systematic inclusion criteria or quantitative synthesis, reporting no sample sizes or effect sizes. The cited underlying literature relies on preclinical and animal models, and direct human relevance was not measured.