64 
ANATOMY OF THE HORSE. 
Relations .—Externally, with the splenius ; internally, with 
the spinalis colli ; posteriorly, it is included between the spinalis 
and longissimus dorsi; 
the splenius. 
Direction. —Along the neck. 
Structure .—Tendinous, when it is attached to the back; 
fleshy from thence to its union with the splenius, where it ends in 
the tendon common to it and that muscle. 
Action. —To erect the head, or to draw it on one side. 
spinalis colli.* — Dorso-spinalis. 
Situation. —Deepest seated upon the side of the neck, 
lying within the interval between the oblique and spinous pro¬ 
cesses. 
Figure. —A near approach to a parallelogram. 
Attachment. —Interiorly, to the oblique processes of all the 
cervical vertebra, except the first and second; also to that of 
the first dorsal: superiorly, to the spines of all the cervical 
vertebra, excepting that of the atlas. 
Relations. —On the outer side, with the complexus and tra- 
chelo mastoideus; on the inner, with the Iigamentum colli and 
the vertebra of the neck. 
Structure. —More tendinous than fleshy at its attachments; 
intersected with layers of tendon elsewhere. 
Action .—To aid in the erection of the head, but more par¬ 
ticularly in the constrained flexion of the neck backwards. 
3.—SUPERIOR CERVICO-OCCIPITAL REGION. 
complexus minor. — Axoido-occipitalis Longus. 
Situation. —Upon the poll. 
Figure. —Long, slender, fusiform. 
Attachment. —To the spinous process of the vertebra den- 
tata ; and at the other end inseparably united with the tendon 
of the complexus major. 
Relations. —Superiorly, with the complexus major ; interiorly, 
with the next muscle: on the inner side, with the Iigamentum 
colli. 
Structure. —The posterior part consists of pale delicate fasci¬ 
culi : the anterior is tendinous. 
Action. —To assist the complexus major in its operation. 
rectus capitis posticus major. — Axoido-occipitalis Brevis. 
Situation. —Underneath, and rather to the outer side of the 
former muscle. 
anteriorly, it is inseparably united with 
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