. Diseases of the ear; a text-book for practitioners and students of medicine. oral and facial veins. Someof the deeper vessels pass into the pterygoid plexus. Theveins of the Eustachian tube follow the course of the arteriesdistributed to this region, and empty into the internal jugulardirectly, or occasionally communicate with the facial, thelingual, or the superior thyroid veins. Between the internalpterygoid muscle and the adjacent wall of the tube a trunk ofconsiderable size establishes communication with the cavern-ous sinus; near the pharyngeal orifice of the Eustachian ca-nal there is,
. Diseases of the ear; a text-book for practitioners and students of medicine. oral and facial veins. Someof the deeper vessels pass into the pterygoid plexus. Theveins of the Eustachian tube follow the course of the arteriesdistributed to this region, and empty into the internal jugulardirectly, or occasionally communicate with the facial, thelingual, or the superior thyroid veins. Between the internalpterygoid muscle and the adjacent wall of the tube a trunk ofconsiderable size establishes communication with the cavern-ous sinus; near the pharyngeal orifice of the Eustachian ca-nal there is, according to Zuckerkandl,* a venous plexus com-municating with the turbinated bodies in the nasal free anastomosis of the veins which return the bloodfrom the deeper portions of the conducting mechanism is ofparticular importance from a therapeutic point of view, sincethis intercommunication between the various channels iscomparatively superficial, and enables us to relieve deep-seated congestion by phlebotomy. The combined area of * Op. cit., p. 38. PLATE The Venous Supply of the Conducting Apparatus. yi fw;T* ki tern PLATE V.
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