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Laterally. The sacro-lumbalis aids to raise the ribs upon
the cervical vertebra?, and also draws the cervical vertebrae
obliquely downwards. The serratus posticus superior lifts the
ribs upward upon the spine, and draws the ribs firmly against
the spine. The cervicis transversalis and the complexus help in
sustaining the head and neck erect. The tracclo-mastoideus
draws the head sidcwise, and draws the cervical spine towards
the side of the head. The semi-spinalis colli aids in a powerful
perpendicular traction against the cervical vertebra?.
2. In the dorsal region we find that the trapezius draws the
scapula almost horizontally towards the spine, and the spine
towards the scapula. The latissimus dorsi draws the shoulder
towards the dorsal vertebras, likewise that portion of the spine
towards the shoulder. The rhomboideus major here draws the
scapula horizontally towards the vertebra, and the spine to the
scapula. The serratus posticus superior simply lifts the ribs upon
the spine, and the serratus posticus inferior depresses the ribs.
The longissimus dorsi creates an oblique action in the whole
dorsal portion of the spine, which is lateral and posterior.
The spinalis dorsi holds the spine perpendicularly erect pos-
teriorly. The tracclo-mastoideus draws the cervical vertebrae
obliquely. The complexus draws the head backward, sets it
firmly, and holds it erect. The splenius capitis draws the head
towards the dorsal spine, and the dorsal towards the head.
3. In the lumbar region, we observe that the latissimus dorsi
draws the shoulder down towards the lumbar region, and that
portion of the spine to the shoulder. The serratus posticus
inferior simply draws down the ribs. The sacro-lumbalis exerts
a powerful oblique action in the whole of the lumbar, and in a
part of the dorsal region. The longissimus dorsi exercises an
oblique influence along the whole of the lumbar vertebra?.
4. In the scapular region, it is noticed that the trapezius
draws the scapula upward and backward; that the levator an-
guli scapula lifts the scapula towards the cervical region, and
draws the spine downward towards the scapula; that the
rhomboideus minor draws the scapula towards the dorsal spine,
and the spine to the scapula; that the rhomboideus major