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Deltoid muscle - Wikipedia, the free encyclopedia (516 words) |
 | From this extensive origin the fibers converge toward their insertion, the middle passing vertically, the anterior obliquely backward and lateralward, the posterior obliquely forward and lateralward; they unite in a thick tendon, which is inserted into the V-shaped deltoid tubercle on the middle of the lateral aspect of the shaft of the humerus. |
| The middle fibres of the muscle arise in a bipenniform manner (like a bird's feather) from the sides of the tendinous intersections, generally four in number, which are attached above to the acromion and pass downward parallel to one another in the substance of the muscle. |
| The oblique fibers thus formed are inserted into similar tendinous intersections, generally three in number, which pass upward from the insertion of the muscle and alternate with the descending septa. |
| Inferior oblique muscle - Wikipedia, the free encyclopedia (386 words) |
| The Obliquus oculi inferior (inferior oblique) is a thin, narrow muscle, placed near the anterior margin of the floor of the orbit. |
| It arises from the orbital surface of the maxilla, lateral to the lacrimal groove. |
| It is the only muscle of eye movement whose origin is not on the common tendonous ring (annulus of Zinn). |
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