Human brain uses theta oscillations to structure fragrance data during active sniffingNeurobiologists from Northwestern University have identified a common mechanism for the conscious processing of smells in both humans and rodents. The research demonstrates that when an individual purposefully sniffs, the brain employs specific activity rhythms to structure scent information without requiring repeated inhalations. Data analysis revealed that during active sniffing, the brain generates low-frequency theta oscillations ranging from 2 to 8 Hz—a frequency that aligns with the rapid breathing rhythm observed in rodents. Instead, sniffing triggers an internal process that structures incoming data within fractions of a second by organizing high-frequency neural impulses that read the fragrance details. This mechanism is governed by the motor cortex and depends on conscious attention rather than acting as an automatic reflex.