360 THE MUSCLES OF THE PIG 
MUSCLES OF THE NECK 
The cutaneus consists of two layers which cross each other obliquely. The 
fibers of the superficial layer are directed nearly vertically, those of the deep layer 
toward the face, on which they are continued to form the facial portion. 
The brachiocephalicus is described with the other muscles of the shoulder girdle. 
The sterno-cephalicus arises on the sternum and is inserted by a long round 
tendon on the mastoid process. 
The thyroid part of the sterno-thyro-hyoideus has a peculiar arrangement. 
It arises (separately from the opposite muscle) on the manubrium sterni. About 
the middle of the neck it has an oblique tendinous intersection, beyond which it 
Fic. 316.—Superrician Muscies or Pic, Arrer Remoyvan or M. Curanevs. 
a, Levator nasolabialis; b, levator labii superioris proprius; 6’, fleshy slip of b which comes from premaxilla; c¢, 
dilatator naris lateralis; d, depressor rostri; e, orbicularis oris; /, depressor labii inferioris; g, zygomaticus; h, masseter; 
t wv, wv’, brachiocephalicus (cleido-occipitalis, cleido-mastoideus, pars clavicularis deltoidei); 4, sterno-cephalicus; J, 
sterno-hyoideus; m, omo-transversarius; 7, n’, trapezius; o, anterior deep pectoral; p, latissimus dorsi; g, lumbo- 
dorsal fascia; 7, obliquus abdominis externus; r’, aponeurosis of 7; s, serratus dorsalis; ¢, serratus ventralis; u, posterior 
deep pectoral; v, supraspinatus; w, w’, deltoideus; 2, long head of triceps; y, lateral head of triceps; z, tensor fascie 
antibrachii; 1, brachialis; 2, extensor carpi radialis; 3, extensor digiti quarti; 4, extensor digiti quinti; 5, extensor 
earpi ulnaris; 6, ulnar head of deep flexor; 7, gluteus medius; 8, tensor fascie# late; 9, 10, 10’, biceps femoris; 11, 
semitendinosus; 72, semimembranosus; 13, caudal muscles; 14, panniculus adiposus in section. (After Ellenberger, 
in Leisering’s Atlas.) 
divides into two branches: one of these is inserted in the usual fashion, the other 
ends on the laryngeal prominence. The hyoid part is well developed. 
The omo-hyoideus is thin. It arises as in the horse, but has no connection 
with the brachiocephalicus nor with the opposite muscle. 
The omo-transversarius arises on the first or second cervical vertebra (under 
cover of the brachiocephalicus), and is inserted into the lower part of the scapular 
spine. 
There are two scaleni. The scalenus ventralis (s. primi costs) resembles 
that of the ox, is attached to the last four cervical vertebra, and is perforated by 
the nerves of the brachial plexus. The scalenus dorsalis (s. supracostalis) arises 
on the transverse processes of the third to the sixth cervical vertebra, and ends 
on the third rib. 
The ventral muscles of the head present no special features. 
The longus colli is separated from the opposite muscle, so that part of the 
bodies of the cervical vertebrie is exposed as in man. 
