口腔領域における交感，感覚および運動神経支配に関する研究 ： Ⅱ. 顎下腺，舌下腺，耳下腺における神経支配

Abstract

Sympathetic and sensory innervation of the submandibular，sublingual and parotid glands，and difference of sensory innervation between the body and duct were studied by horseradish peroxidase (HRP) method. Numerous labeled cells were observed in the ipsilateral superior cervical (SCG) and a few in stellete ganglion (SG) after HRP injection into the submandibular and parotid gland bodies. They were localized at the central 1/2 of SCG. No labeled cells were found in the sympathetic ganglia following sublingual HRP injection. HRP injection into the submandibular，sublingual and parotid gland body brought labeling of small numbers of neurons (1.4，0.6 and 2.2，respectively) in the unilateral trigeminal ganglion (TRG). However，more TRG neurons were labeled after HRP application in the submandibular (7.8±3.4 units) and parotid duct (9.4±3.7 units) than in the gland body. Mean diameter of labeled cells from the duct was significantly smaller (18.6±3.2μm and 18.2±3.4μm，respectively) than that of tooth plup (27.4±5.0μm) or TMJ (23.7±5.9μm). No labeled neurons in SCG were recognized by submandibular gland HRP application after sectioning the facial artery or by parotid HRP injection after cutting the external carotid artery. Most of the sympathetic components supplying the submandibular or parotid gland originate from SCG and much more limitedly from SG. No sympathetic innervation exists in the sublingual gland. While the sensory innervation of the submandibular and parotid gland bodies is rare，that of their ducts is more dense by C-fibers which may generate a pain sensation related to the intraductal sialolithiasis. The sympathetic nerve from SCG and SG is supposed to innervate the submandibular or parotid gland via the feeding arteries after arising from the external carotid plexus. They do not pass by way of the lingual nerve or submandibular ganglion for the submandibular gland，or of the auriculotemporal nerve for the parotid gland.