All around the oral opening eleven muscles are laid out: one initially, of annular form, the labial or orbicular one of the lips, which governs its occlusion then a series of ten others which from the various areas of the face, come to fit on its circumference like so many convergent rays. They are, from top to bottom: the common elevator of the wing of the nose and the upper lip; the very elevator of the upper lip; the canine one; the minor zygomatic muscle; the big zygomatic; the buccinator; the risorius; the triangular one of the lips; the square of the chin; the muscle of the bunch of the chin.
Anatomy of the muscles of the nose
On the nose develop four muscles, knowledge in top, the pyramidal one; in bottom, the myrtiforme; on the sides, the transverse and the dilator one of the nostrils.
This is a flat, thin, digastric muscle, extended from the occiput to the forehead (from which circumstance its name is derived), and placed immediately beneath the cranial integument, to which it closely adheres, at the same time that it rests upon the arch of the skull, over which it slides. It consists of two broad but short fleshy bellies, united by an intervening aponeurosis.
Anatomic description of the biceps muscle
The biceps flexor cubiti (French: muscle biceps-brachial) - named from its two heads and its action - is a thick, somewhat flattened fusiform muscle with a bifid upper extremity.
The infraspinatus muscle (French: Muscle infraépineux) is named from its position below the spine of the scapula - is a fan-shaped, thick, triangular sheet.
The supra-spinatus muscle (French: Muscle supra-épineux) is named from its position above the spine of the scapula. It is a somewhat fan-shaped, thick triangular sheet.
The subscapularis muscle (French: muscle sous-scapulaire)- named from its position beneath the scapula - is a thick triangular and somewhat multipenniform sheet.
Teres major muscle
The teres major muscle (french : muscle grand rond)- named from its somewhat cylindrical shape and its size - is a thick ribbon-shaped muscle.
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