Posterior thigh and blood supply Flashcards
what nerve is affected if a patient has pain and numbness in the medial thigh region?
obturator nerve
what sings can you look for to determine if you have obturator nerve damage?
weakness adductors
muscles innervated by obturator nerve
longus
brevis
magnus
gracilis
pectinous
What is the path of obturator nerve?
obturator canal (foramen)
posterior thigh
hip extensors
knee flexors
hamstring muscles
ALL ATTACH AT ISCHIAL TUBEROSITY
Inn: Tibial Nerve
blood: Perforating arteries, DFA,
Posterior thigh muscles
semitendinosus
semembranosus
bicep femoris Short/long head
Semitendinosus
O: ischial tuberosity, sacrotuberous ligament
I: pes anserinus
Inn: tibial nerve
A: Hip ext, IR
Blood: Perforating arteries, IGA
Semimembranosus
O: ischial tubersity
I: medial condyle of tibia
Inn: tibial nerve
A: Hip etc, IR
Blood: Perforating arteries, IGA
bicep femoris long head
O: ischial tuberosity
I: head of fibula
Inn: tibial nerve
A: Hip ext, ER
Blood: Perforating arteries, IGA
bicep femoris short head
O: ischial tuberosity - later linea aspera of the femur
I: head of fibula
Inn: tibial nerve
A: hip ext, ER
Blood: perforating arteries, IGA
true or false: biceps femoris is removed to see the deeper arteries/veins
true
Sciatic nerve splits into
Common fibular nerve
tibial nerve
posterior femoral cutaneous nerve (S1-S3
inferior clonal branches and branches to the perineum
tibial nerve (L4-S3)
innervates superficial and deep muscles of the popliteal fossa and posterior leg muscles and hamstring (posterior thigh)
common fibular nerve (L4-S2)
spirits into superficial and deep nerves which innervate to the lateral and anterior leg
Popliteal region (diamond) made up of
semimembranosus (Superomedial)
gastrocnemius medial head (inferomedial)
Biceps femoris (superolateral)
gastrocnemius lateral head ( inferolateral)
Popliteal region contents: 6
popliteal A/V
tibial nerve
common fibular nerve
lymphatic vessels
posterior femoral cutaneous nerve
small saphenous vein
what space is located between the two attachments of adductor magnus?
adductor hiatus
Popliteus
O: lateral condyle of femur, lateral meniscus
I: posterior tibia
Inn: Tibial nerve
A: rotation (unlock knee)
Blood: popliteal artery
true or false: a third head (accessory head) of the gastrocnemius is described as “not uncommon?”
true
true or false third head only sups up in about 5-10% of the population ?
false (2-5%)
where does the third head usually sit by?
runs lateral to the popliteal vessels but occasionally joins in the with the medial head compression the popliteal vessels
baker’s cyst (popliteal cyst) occurs when
synovial fluids leaves the synovial membrane/cavity
(hurts the most when doing knee flexion)
