Lower Extremity- Muscles of the Thigh Flashcards
What are the attachments of the Iliacus muscle?
Iiac fossa to the lesser trochanter of the femur
What are the actions of the Iliacus muscle?
Flexion of the thigh at hip, and stabilizes the hip joint
What innervates the Iliacus muscle?
Femoral nerve and lumbar plexus arteries
What provides blood to the iliacus muscle?
Femoral artery, iliolumbar, obturator, and deep circumflex iliac arteries.
What are the attachments of the Psoas muscle?
From anterior lumbar transverse processes, vertebral bodies, and vertebral discs, to the lesser trochanter of the femur.
What are the actions of the Psoas muscle?
Flexes thigh and stabilizes the hip joint
What innervates the Psoas muscle?
ventral rami of L1-L3
What provides blood to the Psoas muscle?
FOIL-E! Femoral, obturator, iliolumbar, lumbar, and external iliac arteries
Rectus femoris muscle
Attachments: from anterior inferior iliac spine & groove of the acetabulum to the base of the patella
Actions: flexes thigh, and extends the leg at the knee
Nerve: femoral n.
Blood supply: femoral, lateral circumflex femoral a.
sartorious muscle
Attachments: from anterior superior iliac spine to medial aspect of the proximal tibia
Actions: flexes thigh, abducts thigh, laterally rotates thigh, flexes leg at knee
Nerve: Femoral n.
Blood supply: femoral, lateral circumflex femoral, descending genicular
Tensor fascia latea muscle
Attachments: anterior superior iliac spine and adjacent iliac crest to Iliotibial Tract (IT band)
Action: abduct, flex, and medially rotate thigh. assists in maintaining leg extended
Nerve: Superior gluteal nerve
Blood supply: Superior gluteal artery, lateral circumflex femoral, superficial circumflex iliac arteries
Vastus intermedius
Attachments: anterior aspect of proximal 2/3 shaft of the femur to the base of the patella
Actions: Extends leg at knee
Nerve: Femoral n.
Blood supply: Femoral artery, profunda femoral artery
Vastus lateralis
Attachments: lateral posterior aspect of the femur to the lateral border of the patella
Action: extends the leg at knee
Nerve: Femoral n.
Blood supply: Femoral, lateral circumflex femoral (descending branch), and 1st perforating.
Vastus medialis
Attachments: medial posterior aspect of the femur to medial border of the patella
Actions: Extends leg at the knee
Nerve: Femoral n.
Blood supply: Femoral, Profunda femorial, Descending genicular
Adductor Brevis
Attachments: inferior pubic ramus to proximal posterior aspect of the femur
Actions: Adducts the thigh at the hip (only!)
Nerve: Obturator n.
Blood supply: Medial circumflex femoral, Obturator, profunda femoral arteries
Adductor Longus
Attachments: Pubic crest to the middle posterior aspect of the femur
Actions: Adducts the thigh at the hip, and also flexes the thigh at the hip
Nerve: Obturator n.
Blood supply: PMFD- Profunda femoral, medial circumflex femoral, femoral, descending genicular
adductor magnus
Attachments: Ischial tuberosity to posterior femur and adductor tubercle
Actions: Adducts and extends the thigh
Nerve: Obturator n. & Tibial division of the sciatic nerve
Blood supply: FPOD- femoral, profunda femoral, Obturator and descending genicular arteries
Gracilis
Attachments: Inferior pubic ramus to the medial proximal aspect of the tibia
Actions: adduct the thigh, medially rotate and flexes the leg
Nerve: Obturator n.
Blood supply: (FP-“With Grace you get a Free Pass”) Femoral, and Profunda femoris
Pectineus
Attachments: Superior pubic ramus to proximal posterior femoral shaft
Action: Adducts and flexes thigh
Nerve: Femoral n. & accessory obturator nerve when it exists
Blood Supply: (Move Over For– pectineus) Medial circumflex femoral, Obturator, Femoral a.
Obturator Externus
Attachments: External aspect of rim of obturator foramen to trochanteric fossa
Action: laterally rotates thigh
Nerve: Obturator n.
Blood Supply: (MO-ney) Medial circumflex femoral, and obturator a.
Biceps femoris
Attachments: Ischial tuberosity (long head) and posterior/lateral femur (short head) to fibular head
Actions: flexes leg (both) and extends thigh (long head)
Nerve: Tibial division of the sciatic nerve (long head), peroneal/fibular division of the sciatic nerve (short head)
Blood supply: (PB-LSG) Perforating brances of profunda femoris, lateral superior genicular
Semimembranosus
Attachments: Ischial tuberosity to posterior aspect of medial tibial condyle
Action: extends the thigh, and flexes the leg
Nerve: Tibial division of the sciatic nerve
Blood Supply: (PB) Perforating branches of profunda femoris a.
Semitendinosus
Attachments: Ischial tuberosity to proximal medial aspect of the tibia
Action: Extends the thigh and flexes leg
Nerve: Tibial division of the sciatic n.
Blood Supply: (PBM) Perforating branches of profunda femoris, medial circumflex femoral a.
