The continuous airflow system used to deliver odor to an antenna was described previously [25].
Unlike the stereotyped response to odors of the olfactory projection neurons that deliver odor information to the MB, the odor tuning of the MBONs is modified by plasticity and varies significantly between individual flies, suggesting that MBONs change their response to odors based on experience (Hige et al., unpublished).
Many research olfactometers deliver odors by bubbling air through a liquid containing the fragrance molecules.
To measure the sniff-response in children, we built a computer-controlled air-dilution olfactometer equipped with a custom-designed double-barreled pediatric nasal cannula that allowed us to simultaneously deliver odors and measure nasal airflow.
Perhaps because of the particular technical expertise that is required in blending and delivering odor, only two of the finalists worked alone.
A stimulus controller (CS-55, Syntech) delivered odor stimuli to the bee's antennae without changing the total air flux to avoid mechanical stimuli.
The child was comfortably seated in front of a computer monitor viewing a cartoon and fitted with a custom-designed double-barreled pediatric nasal cannula that both delivered odors from a computer-controlled air-dilution olfactometer and measured the nasal airflow of the sniff response.
"We use an apparatus to sense the onset of slow-wave sleep and deliver the odor" in short, alternating bursts, Dr. Born said, adding, "I suppose for some students it would not be too difficult to develop something like this".
6 07 P.M. "We're waiting for the first pulse of smell," Forrest says, explaining that this is how the corpse flower delivers its odor.
There was no effect of cimetidine on performance before the odor was delivered (before the odor, 0 14 s, Wald test; 0 mM vs. 1 mM: χ2 = 0.143, p = 0.705; 0 mM vs. 10 mM: χ2 = 0.106, p = 0.744), but the 10 mM cimetidine group was significantly different from the saline group once the odor was delivered (Wald test; 0 mM vs. 10 mM during the odor, 15 19 s: χ2 = 4.169, p = 0.041).
To examine activity to the novel odors, we examined activity from 300 1300 ms after initial odor onset, which corresponded approximately to the time during which the novel odors were delivered to the odor port.
