histological investigation of thermosensitivity in the laryngopharynx.

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It is not investigated in detail about thermosensitivity of laryngopharynx. We guess transiend receptor potential (TRP) family receptors have an intimate involvement in thermosensitivity of laryngopharynx. Most famous receptor is vanilloid receptor type 1(VR1) that is known as capsaicin receptor.We use immunostaining method with VR1, PV5 and PM8 in dorsal root ganglion and trigeminal nerve of Rat. We found VR1 and TRPM positive neuron cell in dorsal root ganglion and trigeminal nerve.