最終更新日：2024/07/31
(anatomy) A broad sheet of muscle that is situated on each side of the neck immediately under the superficial fascia belonging to the group of facial muscles, extends from the collar bone to the angle of the jaw and overlaps the sternocleidomastoid; it is innervated by the facial nerve, draws the lower lip and the corner of the mouth to the side and down, and when moved forcefully expands the neck and draws its skin upward.
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platysma
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platysma
noun
(anatomy)
A
broad
sheet
of
muscle
that
is
situated
on
each
side
of
the
neck
immediately
under
the
superficial
fascia
belonging
to
the
group
of
facial
muscles,
extends
from
the
collar
bone
to
the
angle
of
the
jaw
and
overlaps
the
sternocleidomastoid;
it
is
innervated
by
the
facial
nerve,
draws
the
lower
lip
and
the
corner
of
the
mouth
to
the
side
and
down,
and
when
moved
forcefully
expands
the
neck
and
draws
its
skin
upward.
意味（1）
(anatomy)
A
broad
sheet
of
muscle
that
is
situated
on
each
side
of
the
neck
immediately
under
the
superficial
fascia
belonging
to
the
group
of
facial
muscles,
extends
from
the
collar
bone
to
the
angle
of
the
jaw
and
overlaps
the
sternocleidomastoid;
it
is
innervated
by
the
facial
nerve,
draws
the
lower
lip
and
the
corner
of
the
mouth
to
the
side
and
down,
and
when
moved
forcefully
expands
the
neck
and
draws
its
skin
upward.
