Download muscles ankle - PA

Muscles of the Foot, Ankle,
Lower Leg
Gastrocnemius
• Origin
• Medial head medial femoral
condyle;
• Lateral head lateral condyle
• Insertion the Achilles tendon,
inserting on the middle 1/3 of
the posterior calcaneal surface
• Action Powerful plantar flexor
of ankle
• InnervationTibial nerve (S1,
S2)
Gastrocnemius-medial head
Gastrocnemius-medial head
Gastrocnemius-medial head
Gastrocnemius-lateral head
Gastrocnemius-lateral head
Aponeurosis of Gastrocnemius
Soleus
• Origin fibular head,
Insertion Achilles
tendon, inserting on
the middle 1/3 of the
posterior calcaneal
surface
• Action Powerful
plantar flexor of ankle
• Innervation Tibial
nerve (S1, S2)
Soleus
Soleus
Soleus
Soleus
Plantaris
• Origin supracondylar line
of distal femur
• Insertion Middle 1/3 of
the posterior calcaneal
surface, just medial to
Achilles tendon
• Action Plantar flexor of
ankle; also flexes knee
• Innervation Tibial nerve
(L5, S1, S2)
Plantaris
Plantaris
Plantaris
Achilles Tendon
Achilles Tendon
Achilles Tendon
Tibialis Posterior
• Origin medial fibula,
• Insertion 2
• superficial slip inserts on
the tuberosity of the
navicular bone;
• deeper slip plantar
sufraces of metatarsals 2 4 and second cuneiform
• Action Principal invertor
of foot
• Innervation Tibial nerve
(L4, L5)
Tibialis Posterior
Tibialis Posterior
Tibialis Posterior
Flexor Digitorum Longus
• Origin Posterior surface
of tibia
• Insertion Splits into four
slips these slips then insert
on plantar surface of bases
of 2nd - 5th distal
phalanges
• Action Flexes toes 2 - 5;
also helps inversion of
ankle
• Innervation Tibial nerve
Flexor Digitorum Longus
Flexor Digitorum Longus
Flexor Digitorum Longus
Flexor Digitorum Longus
Flexor Digitorum Longus
Flexor Hallucis Longus
• Origin Inferior 2/3 of
posterior surface of fibula,
• Insertion Plantar surface
of base of distal phalanx
of great toe
• Action Flexes great toe,
helps to invert ankle
• Innervation Tibial nerve
Flexor Hallucis Longus
Flexor Hallucis Longus
Flexor Hallucis Longus
Flexor Hallucis Longus
Flexor Hallucis Longus
Tibialis Anterior
• Origin Lateral condyle of
tibia,
• Insertion 1st cuneiform
and on base of first
metatarsal
• Action Dorsiflexor of
ankle
• Innervation Deep
peroneal nerve (L4, L5,
S1)
Tibialis Anterior -origin
Tibialis Anterior
Tibialis Anterior
Tibialis Anterior
Extensor Hallucis Longus
• Origin Anterior fibula and
the interosseous
membrane
• Insertion Base and dorsal
center of distal phalanx of
great toe
• Action Extends great toe
and dorsiflexes ankle
• Innervation Deep
peroneal nerve (L4, L5,
S1)
Extensor Hallucis Longus
Extensor Hallucis Longus
Extensor Hallucis Longus
Extensor Hallucis Longus
Extensor Digitorum Longus
• Origin head of fibula,
• Insertion Splits into 4
tendon slips each of which
insert on middle and distal
phalanges
• Action Extend toes 2 - 5
and dorsiflexes ankle
• Innervation Deep
peroneal nerve (L4, L5,
S1)
Extensor Digitorum Longus
Extensor Digitorum Longus
Extensor Digitorum Longus
Peroneus Tertius
• Origin fibular shaft
surface
• Insertion base of the fifth
metatarsal
• Action evert the foot
• Innervation Deep
peroneal nerve
Peroneus Tertius
Peroneus Tertius
Peroneus Tertius
Peroneus Brevis
• Origin Inferior 2/3 of
lateral fibular surface;
• Insertion Base of 5th
metatarsal base
• Action Everts foot
Innervation
Superficial peroneal
nerve
Peroneus Brevis
Peroneus Brevis-insertion
Peroneus Brevis
Peroneus Brevis
Peroneus Longus
• Origin Head of fibula,
• Insertion 1st
metatarsal base
• Action Everts foot
• Innervation
Superficial peroneal
nerve
Peroneus Longus
Peroneus Longus
Peroneus Longus