The parotid gland, most of the masseter muscle, and a portion of the
ramus of the mandible are removed. _a_, Remnant of masseter muscle;
_b_, internal pterygoid muscle; _c_, stylo-mandibularis; _d_, _d′_,
levator labii superioris proprius (portion removed); _e_,
periorbita; _1_, masseteric artery; _1′_, parotid branch; _2_, trunk
for anterior (_3_) and posterior (_4_) auricular arteries; _5_,
_5′_, superficial temporal artery; _5″_, transverse facial artery;
_6_, inferior alveolar (or dental) artery; _6′_, mental continuation
of _6_; _7_, buccinator artery; _8_, infraorbital artery; _9_, _11_,
jugular vein; _10_, external maxillary vein; _12_, inferior cerebral
vein; _13_, facial vein; _14_, angular vein of eye; _15_, dorsal
nasal vein; _16_, lateral nasal vein; _17_, superior labial vein;
_18_, _19_, inferior labial veins; _20_, labial plexus; _21_, _22_,
emergent veins of plexus; _23_, vena reflexa; _24_, trunk of
sphenopalatine and infraorbital veins; _25_, palatine vein; _26_,
great auricular vein; _27_, _28_, superficial temporal vein; _29_,
transverse facial vein; _30_, buccinator vein; _31_, dorsal lingual
vein; _32_, inferior alveolar or dental vein; _33_, pterygoid vein;
_34_, deep temporal vein; _35_, superior cerebral vein; _36_,
external nasal nerve; _37_, anterior nasal nerve; _38_, superior
labial nerve; _39_, masseteric nerve; _39′_, end branches of _39_;
_40_, buccinator nerve; _41_, pterygoid nerve; _41a_, inferior
alveolar or dental nerve; _41b_, mylo-hyoid nerve; _42_, posterior
auricular nerve; _43_, auricular branch of vagus; _44_, internal
auricular nerve; _45_, auriculo-palpebral nerve (cut); _46_,
digastric nerve. (After Leisering’s Atlas.)
]
The =lingual vein= (V. lingualis) is not a satellite of the artery. It
is formed at the side of the lingual process of the hyoid bone by the
confluence of several veins which come from the substance of the tongue.
One or two considerable vessels run partly in the substance of the
hyo-glossus, and another in the genio-hyoideus. The vein is at first
covered by the mylo-hyoideus, perforates that muscle, runs back along
the omo-hyoideus in relation to the submaxillary lymph glands, and joins
the external maxillary near the posterior border of the jaw. Near its
termination it receives the =sublingual vein=, or the latter may open
into the external maxillary directly.
8. The =thyroid vein= (V. thyreoidea) is a large vessel which joins the
jugular near the external maxillary vein. It receives anterior thyroid,
laryngeal, and pharyngeal radicles, and sometimes a posterior thyroid
vein.