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Posterior Compartment muscles
- Biceps femoris m., Long head
- Semitendinosus m.
- Biceps femoris m, short head
- Semimembranosus m.
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Hamstring Muscles
- Biceps femoris m. Long head
- Semitendinosus m.
- Semimembranosus m.
'Bi long 2 Semis'
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Biceps Femoris Muscle (long head)
- O: (PIM)Posteroinferomedial ischial tuberosity; shared with semitendinosus
- I: Lateral aspect of fibular head and the anterior edge of the lateral tibial condyle; shared with short head of biceps femoris
- A: Extends thigh, flexes and laterally rotates leg
- N: Tibial part of Sciatic Nerve
- AS: Profunda femoral perforating Arteries, inferior gluteal, and popliteal a.
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Semitendinosus Muscle
- O: (PIM) Posteroinferomedial ischial tuberosity; shared with long head of biceps femoris
- I: Proximal medial shaft of the tibia
- A: Extends thigh, flexes and medially rotates leg
- N: tibial part of Sciatic nerve
- AS: Profunda femoral perforating arteries, inferior gluteal, and popliteal artery
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Biceps femoris Muscle (short head)
- O: Lateral lip of linea aspera and lateral supracondylar line
- I: Lateral aspect of the head of fibula and lateral condyle of the tibia; shared with long head of biceps of femoris muscle
- A: Flexes and laterally rotates leg
- N: Common fibular part of Sciatic Nerve
- AS: Profunda femoris perforating arteries and popliteal artery
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Semimembranosus Muscle
- O: (PSL) Posterosuperolateral ischial tuberosity
- I: Groove of Semimembranosus muscle on posterior aspect of the medial tibial condyle and the posterior knee joint as the oblique popliteal ligament and fascia over the popliteus muscle
- A: Extends the thigh, flexes and medially rotates the leg
- N: Tibial part of sciatic nerve
- AS: Profunda femoral perforating arteries, inferior gluteal, and popliteal arteries
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Pes Anserinus Muscles
- Sartorius (anterosuperior)
- Gracilis (Central)
- Semitendinosus (posteroinferior)
' A Girl between 2 Sargents'
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Anterior Compartment muscles of thigh
- Tensor Fascia Lata
- Sartorius
- Rectus Femoris
- Vastus Intermedius
- Vastus Lateralis
- Vastus Medialis
- Articularis Genu
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Tensor Fascia Lata Muscle
- O: Lateral lip of iliac crest, anterior to iliac tubercle
- I: IT band which attaches to Gerdy's tubercle
- A: Flex and abduct thigh which stablizes hip during gait, extend leg which stabilizes knee during gait
- N: Superior Gluteal
- AS: Lateral femoral circumflex artery and superior gluteal artery
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Sartorius Muscle
- -Longest Muscle in the body
- O: ASIS
- I: Proximal medial shaft of the tibia
- A: Flex and laterally rotates thigh, flex leg, ALL combined is the TAILOR POSITION
- N: Femoral
- AS: Femoral
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Rectus Femoris Muscle
- O: Straight head/Anterior head- AIIS
- Reflected head/Posterior head- Iliac part of acetabular rim, externally
- I: base of patella forming part of quadriceps tendon and the tibial tuberosity via patellar tendon
- A: extend leg at knee, assists iliopsoas with flexion of thigh
- N: femoral
- AS: descending branch of lateral femoral circumflex artery
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Vastus Intermedius Muscle
- O: superior 2/3 of femoral shaft
- I: base of patella forming part of quadriceps tendon and tibial tuberosity via patellar tendon
- A: Extend leg at knee, pull the patella laterally
- N: femoral
- AS: descending branch of lateral femoral circumflex artery
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Vastus Medialis Muscle
- O: inferior intertrochanteric line, spiral line, medial lip of linea aspera, and the superior medial supracondylar line
- I: Medial border of the patella forming part of the quadriceps tendon and then tibial tuberosity via patellar tendon
- A: extend leg at the knee, pull patella medially
- N: Femoral
- AS: femoral, profunda fermoris, and superior medial genicular arteries
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Articularis Genu Muscle
- O: Distal anterior Shaft of the femur
- I: Posterior aspect of the suprapatellar bursa/ the superior extension of the capsule of the knee joint
- A: tense the knee joint capsule/ suprapatellar bursa during extension to prevent impingement of the capsule
- N: femoral
- A: Superior medial genicuarl artery
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Quadriceps Femoris Muscles
- 1. Rectus Femoris
- 2. Vastus Medialis
- 3. Vastus Intermedius
- 4. Vastus Lateralis
- Together they make up the quadriceps tendon, this then attaches the quardriceps femoris muscle to the patella, it envelopes patella and forms patellar tendon which inserts onto tibial tuberosity.
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Medial compartment of the thigh muscles
- Pecitneus
- Adductor longus
- Adductor brevis
- Adductor magnus
- Gracilis
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Pectineus Muscle
- O: Pecten Pubis
- I: Pectineal line of the femur (crosses the obturator externus muscle)
- A: adduct and flex thigh
- N: femoral
- AS: obturator artery and medial femoral circumflex
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Adductor Longus
- O: anterior pubic body
- I: medial lip of the linea aspera (middle 1/3)
- A: adduct and flex the thigh; aids in lateral rotation of thigh
- N: obturator nerve
- AS: obturator artery and medial femoral circumflex
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Adductor Brevis
- O: Anterior surface of the inferior pubic ramus
- I: pectineal line of the femur and superior 1/2 of the medial lip of the linea aspera (shared with pectineus and adductor longus)
- A: adduct and flex the thigh; aids in lateral rotation of thigh
- N: obturator
- AS: obturator artery and medial femoral circumflex
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Adductor Magnus
- O: list anterior to posterior: a. inferior aspect of the inferior pubic ramus b. ischial ramus c. inferolateral part of ischial tuberosity
- I: list superior to inferior: a. gluteal tuberosity (medial edge) b. medial lip of linea aspera and the medial supracondylar line c. supracondylar line and adductor tubercle
- A: Adduct the thigh; aid in flexion of the thigh
- N: obturator nerve and tibial part of sciatic nerve
- AS: medial femoral circumflex, perforating arteries of profunda femoris, obturator, and popliteal
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Adductor Minimus (part of adductor magnus)
- O: inferior pubic ramus
- I: gluteal tuberosity
- A: adduct the thigh; aid in flexion and extension of thigh
- N: obturator
- AS: medial femoral circumflex, perforating arteries, obturator, and popliteal
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Hamstring portion of adductor magnus
- O: ischial tuberosity
- I: adductor tubercle of femur
- A: adduct the thigh; aid in flexion and extension of the thigh
- N: tibial part of sciatic nerve (this is the only part of adductor magnus that is innervated by this nerve)
- AS: medial femoral circumflex; perforating arteries, obturator, and popliteal
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Gracilis Muscle
- O: Anterior aspect of the pubic body, inferior pubic ramus, pubic symphasis
- I: proximal medial shaft of the tibia
- A: adduct the thigh; flex the leg, aids in medial rotation of the leg ( at the knee)
- N: obturator
- AS: medial femoral circumflex; obturator and profunda femoris
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