POSTERIOR MUSCLES OF THE THIGH Flashcards
how is the thigh broken down in terms of compartments?
posterior compartment -superficial -deep anterior compartment -superficial -intermediate -deep medial compartment -anterior -intermediate -posterior
what muscles are found in the posterior compartment of the thigh?
-superficial layer biceps femoris, long head semitendinosus -deep layer biceps femoris, short head semimembranosus
this muscle of the hamstring forms part of the pes anserinus?
semitendinosus
what muscles of the posterior compartment make up the hamstrings?
biceps femoris long head
semimembranosus
semitendinosus
BICEPS FEMORIS M., LONG HEAD ORIGIN
posteroinferomedial ischial
tuberosity (squared posterior part); shared with
semitendinosus muscle
BICEPS FEMORIS M., LONG HEAD INSERTION
lateral aspect of the fibular head and the anterior edge of the lateral tibial condyle; shared with short
head of biceps femoris muscle
- muscle passes inferiorly, then
angles laterally at the knee region 85
- can palpate the tendon at the posterolateral knee region with
resisted contraction
BICEPS FEMORIS M., LONG HEAD ACTION
extends the thigh; flexes and laterally rotates the leg
BICEPS FEMORIS M., LONG HEAD ARTERY
perforating arteries of the profunda femoris, inferior gluteal,
and popliteal arteries
BICEPS FEMORIS M., LONG HEAD INNERVATION
tibial part of sciatic nerve
SEMITENDINOSUS M ORIGIN
posteroinferomedial area of the ischial tuberosity; shared with
the long head of biceps femoris muscle
SEMITENDINOSUS M INSERTION
proximal medial shaft of the tibia - forms part of the pes anserinus (a tendinous structure) - passes inferiorly, then angles medially at the knee region - can palpate the tendon at the posteromedial knee region with resisted contraction - the more prominent tendon in this area, due to a more posterior position
SEMITENDINOSUS M ACTION
extends the thigh; flexes and medially rotates the leg
SEMITENDINOSUS M ARTERY
profunda femoral perforating arteries, inferior gluteal and
popliteal arteries
SEMITENDINOSUS M INNERVATION
tibial part of sciatic nerve
BICEPS FEMORIS M., SHORT HEAD ORIGIN
lateral lip of the linea aspera (inferior 2/3) and the lateral supracondylar line (also the posterior femoral intermuscular
septum)
BICEPS FEMORIS M., SHORT HEAD INSERTION
lateral aspect of the head of the fibula and the lateral condyle of
the tibia; shared with the long head of biceps femoris muscle
- passes inferolaterally and blends with the long head of the biceps
femoris m
BICEPS FEMORIS M., SHORT HEAD ACTION
flexes and laterally rotates the leg
BICEPS FEMORIS M., SHORT HEAD ARTERY
profunda femoral perforating arteries and popliteal artery
BICEPS FEMORIS M., SHORT HEAD INNERVATION
common fibular part of sciatic nerve
SEMIMEBRANOSUS M. ORIGIN
posterosuperolateral part of the ischial tuberosity (squared
posterior part)
SEMIMEBRANOSUS M. INSERTION
groove for semimembranosus muscle (on the posterior aspect of the medial tibial condyle) and the posterior knee joint as the oblique popliteal ligament and the fascia over the popliteus muscle (at the proximoposterior tibia) - passes inferomedially and makes a sharp lateral turn at the posteromedial aspect of the knee region
SEMIMEBRANOSUS M. ACTION
extends the thigh; flexes and medially rotates the leg
SEMIMEBRANOSUS M. ARTERY
profunda femoral perforating
arteries, inferior gluteal and
popliteal arteries
SEMIMEBRANOSUS M. INERVATION
tibial part of sciatic nerve
