IN-OT decreased PUI at rest: (Unexpectedly) suggestive of PNS 
sleepiness, alertness, drowsiness
Our finding of IN-OT having an effect on pupil size at rest, that is, a medium-sized (On the other hand, and more substantially supported by previous evidence, PUI also increases with sleepiness and drowsiness and decreases with alertness (While PUI’s direct association with each branch of the ANS has not yet been researched, HF-HRV is one of the most robust proxies of the PNS, backed by practical and theoretical evidence (