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* Omo-hyoidel's.—Coraco-hyoideus.—This is a very long
thin muscle, arising fom the scapula near the coracoid pro-
cess, and passing around the throat, to be inserted into the
side of the os hyoides. When one of these muscles acts, the
os hyoides is pulled to one side, and when both act, it is pull-
ed downwards.
Sterno-thyroideus.—This muscle lies under the sterno-
hyoideus, which it very much resembles, except that it is
much shorter. It arises immediately under it, from the ster-
num and cartilage of the first rib, and goes upwards to be in-
serted into a rough ridge in the thyroid cartilage, which it
pulls downwards.
Hvo thyroideus.—Thijrco-hijoideus. — Arises from the
basis and horn of the os hyoideus, and goes down to be im-
planted into the lower border of the thyroid cartilage. It
raises the thyroid cartilage, and depresses the os hyoides.
v Crico-thyroideus.—A very short muscle, passing from the
upper edge of the cricoid to the lower margin of the thyroid
cartilage. It pulls the thyroid towards the cricoid cartilage.
MUSCLES SITUATED BETWEEN THE LOWER JAW
AND OS HYOIDES LATERALLY.
Stylo GLOSSus.—Arises from the styloid process of the
temporal bone, goes obliquely downwards and forwards to be
inserted into the side of the tongue in a radiated form, so as
to make part of the llesh of the tongue. Its office is to pull
the tongue backwards into the mouth.
Stylo-hyoideus.—Stijlo-hijoideus alter.—Arises, like the
former, from the styloid process, and goes obliquely down-
wards and forwards to be inserted into the side of the os hyo-
ides. Just above its insertion, its fibres are slit so as to
form a small loop for the tendon of the digastricus to pass
• f5 - -
* Omo-hyoidel's.—Coraco-hyoideus.—This is a very long
thin muscle, arising fom the scapula near the coracoid pro-
cess, and passing around the throat, to be inserted into the
side of the os hyoides. When one of these muscles acts, the
os hyoides is pulled to one side, and when both act, it is pull-
ed downwards.
Sterno-thyroideus.—This muscle lies under the sterno-
hyoideus, which it very much resembles, except that it is
much shorter. It arises immediately under it, from the ster-
num and cartilage of the first rib, and goes upwards to be in-
serted into a rough ridge in the thyroid cartilage, which it
pulls downwards.
Hvo thyroideus.—Thijrco-hijoideus. — Arises from the
basis and horn of the os hyoideus, and goes down to be im-
planted into the lower border of the thyroid cartilage. It
raises the thyroid cartilage, and depresses the os hyoides.
v Crico-thyroideus.—A very short muscle, passing from the
upper edge of the cricoid to the lower margin of the thyroid
cartilage. It pulls the thyroid towards the cricoid cartilage.
MUSCLES SITUATED BETWEEN THE LOWER JAW
AND OS HYOIDES LATERALLY.
Stylo GLOSSus.—Arises from the styloid process of the
temporal bone, goes obliquely downwards and forwards to be
inserted into the side of the tongue in a radiated form, so as
to make part of the llesh of the tongue. Its office is to pull
the tongue backwards into the mouth.
Stylo-hyoideus.—Stijlo-hijoideus alter.—Arises, like the
former, from the styloid process, and goes obliquely down-
wards and forwards to be inserted into the side of the os hyo-
ides. Just above its insertion, its fibres are slit so as to
form a small loop for the tendon of the digastricus to pass
• f5 - -