The information transmitted by a single larval OSN is sufficient to represent positive and negative odor gradients through the excitation and inhibition of spiking activity.
"I disagree," says Giff. "This hand seems like it might be the key to our Possible Source of your Negative Odor.
(E, right) Quantification of FLAG-H2BE in Olfr653+ neurons (chosen randomly as a negative control) exposed to odors or mineral oil (no odor).
A negative association was reported when odor was the measure of exposure to AFOs and self-reported disease, the measure of outcome.
One study found that CAFO neighbors experience lower secretion and concentration of an immune system protein during odor episodes; another reported livestock odor as having a negative impact on adult levels of tension, depression, and anger.
Thus, using the Orco − mutation as a negative control allows the identification of odors that only rely on Or signaling.
Consequently, for transiens locusts that have already formed an aversive association between HSC and an odor, HSC may no longer act as a negative reinforcer upon subsequent exposure.
Stimulating odors are indicated, except for Olfr167, which serves as a negative control.
A third odor receptor loss-of-function mutant, Orco −, was used as a negative control.
We first monitored odor-evoked activity in flies that express GCaMP in PNs and DTK-RNAi in LNs or ORNs as a negative control.
