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Lateral Compartment of the Leg
The lateral compartment of the leg also known as •Fibular compartment or•Peroneal compartment
The lateral compartment of the leg also known as •Fibular compartment or•Peroneal compartment
It is the smallest of the 4 compartments in the leg
It contains 2 muscles that •evert the foot •plantarflex the ankle joint
The lateral compartment of the leg also known as •Fibular compartment•Peroneal compartment
It is the smallest of the 4 compartments of the leg
It contains 2 muscles that •evert the foot •plantarflex the ankle joint
1. Fibularis or Peroneus Longus
2. Fibularis or Peroneus Brevis
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Septum
Septum
Interosseous membrane
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Deep PosteriorCompartment
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Deep PosteriorCompartment
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Superficial Posterior Compartment
Deep PosteriorCompartment
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Deep PosteriorCompartment
Superficial Posterior Compartment
Anterior Compartment
Tibia
Fibula
Cross Section through middle of right leg looking up from foot
anterioranterior
posteriorposterior
LATERAL
MEDIAL
Superficial Posterior Compartment
Deep PosteriorCompartment
Lateral Compartment
Anterior Compartment
Fibularis or Peroneus Longus
Arises from -Head of the Fibula -Upper 2/3rds of the lateral surface of the Fibula
Arises from -head of the fibula and the -upper 2/3rds of the lateral surface of the fibula
The tendon runs obliquely in the sole of the foot and inserts onto the-Medial cuneiform-base of 1st metatarsal
Fibularis or Peroneus Longus
Fibularis or Peroneus Brevis
Arises from the lower 2/3rds of the lateral surface of the shaft of the Fibula
Where the muscles overlap, Peroneus Brevis is the anterior one and Peroneus Longus is the posterior one.
Arises from the lower 2/3rds of the lateral surface of the shaft of the fibula
Inserts onto the styloid process at the base of the 5th metatarsal
Fibularis or Peroneus Brevis
Where these muscles overlap, Peroneus Brevis is the anterior one and Peroneus Longus is the posterior one.
Where the two tendons overlap behind the lateral malleolus
Peroneus Brevis lies anterior to Peroneus Longus
To help you remember, think of Peroneus Longus as
‘Lounging Behind’!
Peroneus Brevis lies anterior to
Peroneus Longus
Peroneus LongusPeroneus Longustendontendon
Peroneus Brevis Peroneus Brevis tendontendon
Lateral Malleolus Lateral Malleolus (distal end of Fibula)(distal end of Fibula)
Both muscles are supplied by the
Superficial Peroneal Nerve a terminal branch of the Common Peroneal Nerve
Both muscles are supplied by the
Superficial Peroneal Nerve a terminal branch of the Common Peroneal Nerve
It has an extensive sensory distribution to the•anterolateral aspect of distal part of the leg •dorsum of the foot
Both muscles are supplied by the
Superficial Peroneal Nerve a terminal branch of the Common Peroneal Nerve
It is sometimes referred to as the Musculocutaneous Nerve of the Leg
It has an extensive sensory distribution to the•anterolateral aspect of distal part of the leg •dorsum of the foot
Summary of Muscles
Peroneus or Fibularis LongusOrigin Head of fibula, upper 2/3rds of
lateral fibular shaft surfaceInsertion Plantar posterolateral aspect of
medial cuneiform and lateral side of 1st metatarsal base
Action Everts foot and plantar flexes ankle, supports the transverse arch of the foot
Nerve Supply Superficial peroneal nerve (L5, S1, S2)
Blood Supply Anterior tibial and peroneal arteries
Lateral Leg
Peroneus or Fibularis BrevisOrigin Lower 2/3rds of lateral fibular
surface; Insertion Lateral surface of styloid process
of 5th metatarsal baseAction Everts foot and plantar flexes
ankleNerve Supply Superficial peroneal nerve (L5, S1,
S2)Blood Supply Muscular branches of peroneal
artery
Lateral Leg
