Anatomy Of The Gastrocnemius Muscle - Everything You Need To Know - Dr. Nabil Ebraheim

muscle Anatomy the gastrocnemius muscle

is a part of the superficial flexors of

the leg

official flexor muscles in the leg the

gastrocnemius the soleus and plantaris

the gastrocnemius muscle arises from the

femur and it crosses the knee joint and

the ankle joint the gastrocnemius muscle

has two heads medial and lateral head

origin there are two heads the lateral

head arises from the lateral surface of

the lateral femoral condyle a medial

head of the gastrocnemius comes from the

posterior surface of the femur above the

medial femoral condyle the medial head

is larger and extends lower than the

lateral head of the gastrocnemius

two heads of the gastrocnemius muscle

unite together near the middle of the

leg the two heads are separated by a

ferrule in which the shura nerve and the

small saphenous vein are present

the two bellies of the gastrocnemius end

in a tendon which joins the tendon of

the soleus to form together the Tendo

Achilles or the tendo calcaneus which

inserts into the middle third of the

posterior surface of the calcaneus

innovation the gastrocnemius muscle is

innervated by the tibial nerve s1 s2 and

each head of the muscle has its own

branch the tibial nerve passes behind

the gastrocnemius and soleus muscles

through the fibrous arch of the soleus

blood supply each head of the

gastrocnemius muscle is supplied by the

shorter branch of the popliteal artery

function together with the soleus the

gastrocnemius muscle is a powerful

plantar flexor of the ankle

because the gas with nameless muscle

crosses the knee joint

it also flexes the knee

muscle is involved in running and

jumping it is a fast movement muscle

it contains white type to fast twitch

muscle fibers in contrast to the soleus

which contains type 1 is slow twitch

muscle fibers

what is the clinical significance of the

gastrocnemius muscle

the flexor muscle group has two

compartments the superficial and the

deep the gas with genious muscle is part

of the superficial flexor compartment of

the leg

here is a cross-section showing the four

compartments of the leg

and this is the fasciotomy incisions for

the two incision technique it opens all

the four compartments including the

superficial flesh or group

the gastrocnemius muscle is part of the

boundaries of the popliteal fossa the

popliteal fossa is bounded by the biceps


Sapir ly and laterally as well the

semitendinosus and membranous Sapir ly

and medially in the lower part of the

popliteal fossa their space is formed by

the two heads of the gastrocnemius


bertha baker says baker says lies

between the semimembranosus and the

medial head of the gastrocnemius as you

can see in the cross-section

baker's cyst is commonly caused by knee

arthritis or meniscal tear the cyst is

connected to the knee joint through a

valve ler opening

knee effusion from the intra-articular

pathology allows the flow to go through

the valve to the cyst in one direction

another clinical situation in the

approach to the postural medial fragment

of the tibial plateau

you approach this posteromedial fracture

fragment of the tibial plateau through

an incision between the medial

gastrocnemius and the semimembranosus

and this fragment has its own fixation

an anti glide plate to buttress this


yes igneous tightness improved ankle

dorsiflexion with knee flexion means

gastrocnemius tightness or contracture

and when you have the same ankle

dorsiflexion with any inflection or an

extension that means achilles tightness

in gaseous tightness or contracture

the treatment is gastrocnemius recession

which can be helpful in diabetic foot


Media gastrocnemius rotation flap can be

used for proximal tibial open fractures

and large soft tissue defects around the


in supracondylar fractures of the femur

the gastrocnemius muscle extend the

distal fragment the a is

posteriorly the hamstrings and extensor

muscles cause shortening of the femur

adductor Magnus causes varus of the

distal fragment

thank you very much I hope that was