. The comparative anatomy of the domesticated animals. Veterinary anatomy. 280 THE MUSCLES. it contracts, it is limited to wrinkling the skin of the eyebrow in drawing it slightly to the nasal angle—which it can do whether the eyelids are in contact or apart. 3. Lacheymalis Muscle. ((Synonym.—Not mentioned by Percivall. It is the inferior palpebral muscle of Leyh.) A wide and very thin muscle, situated superficially below the eye. It is con- tinuous, in front, with the panniculus ; behind, with the levator labii superioris ; above, with the orbicularis of the eyelids. Its fibres, partly muscul
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 280 THE MUSCLES. it contracts, it is limited to wrinkling the skin of the eyebrow in drawing it slightly to the nasal angle—which it can do whether the eyelids are in contact or apart. 3. Lacheymalis Muscle. ((Synonym.—Not mentioned by Percivall. It is the inferior palpebral muscle of Leyh.) A wide and very thin muscle, situated superficially below the eye. It is con- tinuous, in front, with the panniculus ; behind, with the levator labii superioris ; above, with the orbicularis of the eyelids. Its fibres, partly muscular and partly aponeurotic, leave the external surface of the lachrymal and malar bones, are directed do«Ti wards, and become Fig-169. lost in a connective tissue fascia which covere the buccinator; some pass beneath the zygo- maticus and form the zygoma- ticus minor,when this is present. This muscle is supposed to corrugate and twitch the skin below the eye. c. aueicular, or conchal Region. The muscles of this region move the concha, or pavilion of the ear {concha auris). The largest arise from the surface of the cranial bones or cord of the cervical ligament, and terminate on the cartilages of the external ear ; the medium- sized pass from one cartilage to another; and the smallest are found on the surface of the concha, inside and out. The latter are really intrinsic muscles, but they are of so little importance that we will not describe them. The others are ten in number. In the first plane we find the zijgomatico-auricularis {atto- Ims anticus), tempero-auricu- laris externus (attolens maxi- mus), scuto-auricularis externus, three cervico-auriculares (re- trahens externum, medius, inter- nus), and parotido-auricularis (abducens) ; the second plane, the temporo-auricularis internus {attolens posticus), scuto-auricularis internus, tympano-auricularis {mastoido-auricularis). Before studying these muscles, it is indispensable to examine the pieces of. MUSCLES OF THE EXTERN
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