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Suppose you swallowed a little capsule with a blunt poker which had some impulse of force applied every few seconds. What would be the sensitivity ordering (of lips, mouth, throat, esophagus, stomach, duodenum, jejunum, ilium, colon, rectum, anus)?

Does sensitivity just fall to a minimum in the middle of the digestive tract and increase again to the exit, or are there any other extremum (e.g., at the ilium-colon interface) along the way? I'm guessing people could infer the answer by looking at the density of nerve cells along this route, but I couldn't find any comparable scientific data in my quick internet searches.

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    $\begingroup$ Let's be clear do you want only perceivable sensibility or non perceivable sensitivity? $\endgroup$
    – JM97
    Sep 3, 2017 at 15:09
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    $\begingroup$ I want perceivable sensibility. In the experiment, the person would be ranking how well he/she feels the periodic poking (and for a bonus, I might ask if it feels good or feels painful). It's still subjective, but the best experiment I could think of. $\endgroup$
    – bobuhito
    Sep 3, 2017 at 15:51
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    $\begingroup$ This is such an artificial scenario, I'm wondering why it would matter? Different parts of the GI tract are innervated for different things/reasons. $\endgroup$
    – anongoodnurse
    Sep 3, 2017 at 18:00

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