Or, if you feel a sneeze coming on, and it feels "stuck," you can bring it on by looking at a light, or even just upwards toward the ceiling or sky. What gives, here?
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So does this explain why I can make myself sneeze by scratching my eyebrow? Is the trigeminal nerve in that area too?
This could be the case, yes. The trigeminal nerve is rather large, and handles most facial sensations. The part of the nerve near the eyebrow is called the ophthalmic nerve, so scratching this portion of the nerve may cause you to sneeze
Thanks for that information, Btryon86 - I always wondered why I could do that!
That is a very reasonable-sounding answer. So, in essence, the same nerve as in (your?) hub about what causes a "brain freeze." Interesting. Thank you for a clear explanation.