Aviophobia subjects have visual input to equilibrium system practically none by sight : the back of the former seat and diminished sight capacity because of OCI or BPPV.
Proprioceptive sense input does not correlate gravitation in a moving aeroplane. The third factor is vestibular system imbalance because of BPPV.
Persons with aviophobia and who have OCI or BPPV seem to get help to the condition with positional treatments.
Thus all three inputs to equilibrium system brain stem are not normal and persons´ experience of flight is unpleaseant.
The treatment: see update and shortcut. It has helped to this part of aviophobia.
Motion sickness subjects have normal proprioceptive input.
They have OCI or BPPV and thus vestibular canals give distorted input to brain stem. During now 12 years all motion sickness persons have had this.
If they do not look continuously at some fixed target through the wind screen even if with diminished capacity, then 2 out of 3 input systems are not normal and they experience motion sickness.
When OCI or BPPV is treated, motion sickness disappears: see: update and shortcut
The treatment works through an effect on the basic phenomenon in motion sickness. It was published in Clinical Otolaryngology 2002. http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2273.2002.00602.x/full
Panic symptoms: When aviophobia mechanism described above increases, it may be a part of panic symptoms.
Because the vestibular canals adjust and control the eye movements ,the patients have more narrow visual field , worse accuracy and other effects on different senses: see the other panic chapter and dyslexia and visual field.