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Abstract:The a. malaris of the Japanese monkey (Macaca fuscata fuscata) was investigated comparatively by means of the acryl plastic injection method. The infraorbital artery itself divided into two to four branches, and each of which entered the same named canal. The medialmost of them gave off the a. malaris immediately before the orifice of the canal, sometimes anastomosing with a twig of the inferior muscular branch of the ophthalmic artery. The a. malaris passed superomedially and slightly posteriorly on the orbital surface of the maxilla, giving off the infraorbital nerve, the infraorbital marginal and the periosteal branches, upto a position in front of the origin of the obliquus inferior muscle, where the artery gave off the inferior nasolacrimal canal and the inferior oblique muscular branches and passed within the bone through a small foramen located in the lacrimomaxillary suture as the superior nasolacrimal canal branch. Rarely, the artery gave off a lacrimal sac branch, and anastomosed with the lacrimalsac branch of the medial palpebral artery of the ophthalmic artery. The inferior nasolacrimal canal branch, giving twigs to the maxillary body and sinus, passed downward along the nasolacrimal canal and formed the inferior portion of the nasolacrimal artery. The superior nasolacrimal canal branch passed medialward and formed the superior portion of the above artery.In conclusion, the author confirmed the presence of the a. malaris in the Japanese monkey, although the main stream of this artery terminated in the nasolacrimal canal branches and formed the nasolacrimal artery.
Abstract:The a. malaris of the Japanese monkey (Macaca fuscata fuscata) was investigated comparatively by means of the acryl plastic injection method. The infraorbital artery itself divided into two to four branches, and each of which entered the same named canal. The medialmost of them gave off the a. malaris immediately before the orifice of the canal, sometimes anastomosing with a twig of the inferior muscular branch of the ophthalmic artery. The a. malaris passed superomedially and slightly posteriorly on the orbital surface of the maxilla, giving off the infraorbital nerve, the infraorbital marginal and the periosteal branches, upto a position in front of the origin of the obliquus inferior muscle, where the artery gave off the inferior nasolacrimal canal and the inferior oblique muscular branches and passed within the bone through a small foramen located in the lacrimomaxillary suture as the superior nasolacrimal canal branch. Rarely, the artery gave off a lacrimal sac branch, and anastomosed with the lacrimalsac branch of the medial palpebral artery of the ophthalmic artery. The inferior nasolacrimal canal branch, giving twigs to the maxillary body and sinus, passed downward along the nasolacrimal canal and formed the inferior portion of the nasolacrimal artery. The superior nasolacrimal canal branch passed medialward and formed the superior portion of the above artery.In conclusion, the author confirmed the presence of the a. malaris in the Japanese monkey, although the main stream of this artery terminated in the nasolacrimal canal branches and formed the nasolacrimal artery.
Summary: The arterial vasculature in the floor region of the mouth and the submandibular region of the crab-eating monkey was studied by the acrylic plastic injection method.1. The titled regions were found to be supplied by the hyoid branch and the sublingual artery arising from the lingual artery, and the submandibular glandular branch, the mylohyoid branch and the submental artery from the facial artery.2. The hyoid branch supplied the mylohyoid and geniohyoid muscles. 3. The sublingual artery sent off the following branches: (1) the genioglossal branch to the genioglossus muscle, (2) the alveolingual artery to a wide area in the floor region of the mouth including several muscles, the sublingual gland and the gingiva and mucosa of the lingual side of the premolar area, (3) the sublingual papillary branch to the papilla, (4) the incisive gingival branch to the lingual gingiva of the lower incisors and canine, (5) the alveolar branch to the lower incisors, and (6) the median inferior labial artery to the lower lip and labial gingiva of the lower incisors.4. The submandibular glandular branch of the facial artery supplied the submandibular gland.5. The mylohyoid branch supplied the mylohyoid and digastric muscles and the lingual gingiva of the lower molars.6. The branches of the submental artery were as follows: (1) the submandibular lymph node branch to the lymph nodes and the skin and muscles in the submandibular region, (2) the digastric branch to the digastric muscle, and (3) the gingival branch to the labial gingiva opposite the canine and lower lateral incisors.
Summary: Detailed observations were made of the a. malaris in 11 adult common squirrel monkeys (Saimiri sciureus) utilizing the plastic injection method. The malar artery was well-developed in all 21 examples observed and arose medially from the infraorbital artery proximal to the entrance of the infraorbital canal and lateral to the obliquus inferior muscle. The a. malaris passed superomedially outside the periorbita on the orbital surface of the maxilla and curved medially in front of the muscle, where it gave rise to the infraorbital nerve, the periosteal, the inferior oblique muscular and the infraorbital marginal branches. However, these branches arose directly from the infraorbital artery in many cases. The malar artery ascended in the lower eyelid up to the bottom of the lacrimal sac, where it gave rise to the third palpebral branch and the medial inferior palpebral artery. This artery did not anastomose with peripheral branches of the supraorbital artery. The malar artery continued to pass superomedially behind the lacrimal sac and gave off the nasolacrimal canal and the lacrimal sac branches. However, the former arose in common with the latter in many cases. The malar artery finally ascended behind the medial palpebral ligament after giving off the dorsal nasal branch and the medial superior palpebral artery at the superior end of the lacrimal sac. Its main stream formed a strong communication with the dorsal nasal artery of the supraorbital artery. This communication in an arc was characteristic in the common squirrel monkey. The medial inferior and superior palpebral arteries were well-developed in all examples and formed distinct, inferior and superior palpebral arterial arches by anastomosing with the lateral fellows of the lacrimal, respectively. A large arterial ring surrounding the upper tarsus was constructed from the superior palpebral arterial arch, branches of the lateral superior palpebral artery and the palpebral branch of the supraorbital artery.
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