Lecture 18: Medial Thigh Muscles Flashcards
all of the medial thigh muscles except ____ and ____ cross the hip anteriorly to flex the thigh at the hip
- post part of adductor magnus
- obturator externus
all of the medial thigh muscles except ____ contribute to medial rotation of the thigh at the hip when the hip is externally rotated
obturator externus
all of the medial thigh muscles inferior/medially adduct the thigh at the hip, so this group is known as the ____
adductor group
all of the medial thigh muscles except the ____ and ____ attach distally to the linea aspera of the femur
- gracilis
- obturator externus
adductor longus
- P: body of pubis
- D: linea aspera
- A: ADD, flex, IR hip
- N: obturator n. (L2-L4)
adductor brevis
- P: inf pubic body and ramus
- D: linea aspera and pectinate line
- A: ADD, flex, IR hip
- N: obturator n. (L2-L4)
adductor magnus (anterior part)
- P: ischiopubic ramus
- D: linea aspera and medial supracondylar line
- A: ADD, flex, IR hip
- N: obturator n. (L2-L4)
adductor magnus (posterior part)
- P: ischial tuberosity
- D: adductor tubercle of femur
- A: ADD and extend hip
- N: tibial n. (L4)
the adductor hiatus is formed between the distal attachments of the ____ and ____
hamstrings; adductors
the adductor hiatus allows passage of the _____ from anterior to posterior thigh
femoral artery and vein
gracilis
- P: inf pubic ramus
- D: medial tibia (pes anserine)
- A: ADD, flex, IR hip; flex knee
- N: obturator n. (L2,L3)
what 2 joints does the gracilis act on?
hip and knee
what 3 muscles form the pes anserine?
gracilis, sartorius, semitendinosus
obturator externus
- P: ext surface of obturator foramen/membrane
- D: greater trochanter (post to neck of femur)
- A: ER hip
- N: obturator n. (L3,L4)
what is unique about the action of the obturator externus?
it is the only muscle in this group that externally rotates the hip; all of the others do internal rotation
