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peroneus

Peroneus is a term used in human anatomy to designate muscles associated with the fibula. Derived from Latin, it broadly refers to the fibular region and its muscular attachments. In standard usage, the peroneal muscles include the peroneus longus and peroneus brevis in the lateral leg compartment, with the peroneus tertius variably present in the anterior compartment.

Peroneus longus originates from the head and upper two-thirds of the lateral fibula, courses around the lateral

Peroneus brevis arises from the lower two-thirds of the lateral fibula, travels behind the lateral malleolus,

Peroneus tertius, present variably among individuals, is typically considered part of the anterior compartment. It originates

Innervation differs among the muscles: peroneus longus and peroneus brevis are supplied by the superficial fibular

Clinically, peroneal tendons are prone to injuries such as tenosynovitis or tears, especially with ankle sprains

malleolus,
and
inserts
on
the
plantar
surfaces
of
the
medial
cuneiform
and
the
base
of
the
first
metatarsal.
Its
primary
actions
are
foot
eversion
and
plantarflexion,
and
it
helps
support
the
transverse
and
longitudinal
arches
of
the
foot.
and
inserts
on
the
tuberosity
of
the
base
of
the
fifth
metatarsal.
It
mainly
everts
the
foot
and
plantarflexes
the
ankle,
contributing
to
lateral
ankle
stability.
from
the
distal
portion
of
the
fibula
and
inserts
on
the
base
of
the
fifth
metatarsal.
It
assists
dorsiflexion
and
eversion
of
the
foot.
(peroneal)
nerve,
while
peroneus
tertius
is
supplied
by
the
deep
fibular
nerve.
or
overuse.
Dysfunction
can
affect
foot
eversion,
ankle
stability,
and
arch
support.