Last Updated：2025/11/25
(anatomy) A long thick superficial muscles on each side of the anterior neck which arises by one head from the first segment of the sternum and by a second from the inner part of the clavicle, that inserts into the mastoid process of the temporal bone and that acts especially to bend, flex, rotate and extend the head.
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sternocleidomastoid muscle
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Source Word
sternocleidomastoid muscle
Noun
(anatomy)
A
long
thick
superficial
muscles
on
each
side
of
the
anterior
neck
which
arises
by
one
head
from
the
first
segment
of
the
sternum
and
by
a
second
from
the
inner
part
of
the
clavicle,
that
inserts
into
the
mastoid
process
of
the
temporal
bone
and
that
acts
especially
to
bend,
flex,
rotate
and
extend
the
head.
Japanese Meaning
前頸部の左右に位置する長く厚い表在筋で、胸骨の第1部からの起始と鎖骨の内側部からの起始があり、側頭骨の乳様突起に停止する。頭部の屈曲、回旋、伸展などの運動に作用する。
Sense（1）
(anatomy)
A
long
thick
superficial
muscles
on
each
side
of
the
anterior
neck
which
arises
by
one
head
from
the
first
segment
of
the
sternum
and
by
a
second
from
the
inner
part
of
the
clavicle,
that
inserts
into
the
mastoid
process
of
the
temporal
bone
and
that
acts
especially
to
bend,
flex,
rotate
and
extend
the
head.
（ plural ）
