Muscles
Muscles of the mouth or the lips
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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
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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.
Muscle occipito frontalis (Douglas), epi-cranius (Albinus)
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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
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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.
Infraspinatus muscle
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The infraspinatus muscle (French: Muscle infraépineux) is named from its position below the spine of the scapula - is a fan-shaped, thick, triangular sheet.
Supra-spinatus muscle
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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.
Subscapularis muscle
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The subscapularis muscle (French: muscle sous-scapulaire)- named from its position beneath the scapula - is a thick triangular and somewhat multipenniform sheet.
Anatomy of the Deltoid muscle
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The deltoid muscle (French: muscle Deltoïde; latin : deltoideus) is fleshy from the lateral border and upper surface of the acromion and from the ventral border and upper surface of the lateral third of the clavicle, and tendinous from the spine of the scapula. Some fibre-bundles also at times arise from the deep fascia of the muscle where it overlies and is fused to the fascia of the infraspinatus muscle near the spine.