Combining a Breath-Synchronized Olfactometer and Brain Stimulation to Study the Effect of Odor on Corticospinal Excitability and Effective Connectivity
Résumé
This paper describes using a breath-synchronized olfactometer to trigger single-and dual-coil transcranial magnetic stimulation during odorant presentation synchronized to human nasal breathing. This combination allows us to objectively investigate how pleasant and unpleasant odors impact corticospinal excitability and brain-effective connectivity in a given individual.
It is widely accepted that olfactory stimulation elicits motor behaviors, such as approaching pleasant odorants and avoiding unpleasant ones, in animals and humans. Recently, studies using electroencephalography and transcranial magnetic stimulation (TMS) have demonstrated a strong link between processing in the olfactory system and activity in the motor cortex in
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