Unit 5 - Lower Limb: Superficial Medial Thigh Muscles (Ex. IV)

Question 1

adductor longus

Answer 1

O: S pubic ramus and A side of pubic symphysis
I: femur on M lip of middle 1/3 of linea aspera
Inn: A branch of obturator n. (L2-L4)
A: adduction and flexion of hip (up to 70 degrees) and extension of hip (past 80 degrees of flexion); stabilizes pelvis in coronal and sagittal planes

Question 2

adductor brevis

Answer 2

O: I pubic ramus
I: pectineal line and proximal 1/3 of M lip of linea aspera of femur
Inn: A branch of obturator n. (L2, L3)
A: adduction and flexion of hip (up to 70 degrees) and extension of hip (past 80 degrees of flexion); stabilizes pelvis in coronal and sagittal planes

Question 3

gracilis

Answer 3

O: I pubic ramus below pubic symphysis
I: M border of tibial tuberosity, in pes anserinus along w/ tendons of sartorius and semitendinosus
Inn: A branch of obturator n. (L2, L3)
A: adduction and flexion of hip; flexion and internal (M) rotation of knee

Question 4

pectineus

Answer 4

O: pecten pubis
I: pectineal line
Inn: femoral n. (L2, L3); A branch of obturator n. (L2, L3)
A: adduction, external (L) rotation, and slight flexion of hip; stabilizes pelvis in coronal and sagittal planes