Does olfactory experience during early development influence the functional maturation of the cognitive system and the development of cognitive abilities?

Is the coordination of activity in the cognitive system by the respiration rhythm necessary for cognitive processing?

Is olfactory dysfunction specific enough as a biomarker for Alzheimer’s disease and Parkinson’s disease? Does olfactory dysfunction and the lack of coordination in olfactory rhythms contribute to cognitive dysfunctions?

Does olfactory dysfunction contribute to cognitive symptoms in other mental and neurodevelopmental disorders?