Muscles of Medial Thigh Flashcards
What are the muscles in the medial compartment of the thigh collectively called?
Hip adductors
Name the 5 muscles in the medial compartment of the thigh.
Gracilis, obturator externus, adductor brevis, adductor longus, adductor magnus
What is the innervation of medial thigh muscles?
Obturator nerve (L2-L4)
What is the blood supply of the medial thigh muscles?
Obturator artery
Where is the adductor magnus found?
Posterior to the other adductor muscles
The adductor magnus is split into 2 parts. Name these 2 parts.
Adductor part and hamstring part
What is the origin and insertion of the adductor part of the adductor magnus?
Originates from the inferior rami of the pubis and ischium, attaches linea aspera
What is the origin and insertion of the hamstring part of the adductor magnus?
Originates from ischial tuberosity, attaches to adductor tubercle of femur
What is the action of the adductor magnus?
Adductor part does adduction at hip, hamstring part does extension at hip
What is the innervation of the adductor magnus?
Adductor part innervated by obturator nerve, hamstring part innervated by tibial branch of sciatic nerve
Describe the relative positions of the adductor longus, adductor brevis, and adductor magnus.
Adductor longus partially covers the adductor brevis and magnus
What is the origin and insertion of the adductor longus?
Originates from body of pubis, attaches to linea aspera
What is the action of the adductor longus?
Adduction of thigh
What is the innervation of the adductor longus?
Obturator nerve
How is the adductor brevis sometimes used as an anatomical landmark?
Lies between anterior and posterior divisions of the obturator nerve, so can be used to find these nerve branches
What is the origin and insertion of the adductor brevis?
Originates from body of pubis and inferior rami of pubis, attaches to linea aspera
What is the action of adductor brevis?
Adduction of thigh
What is the innervation of the adductor brevis?
Obturator nerve
What is the origin and attachment of the obturator externus?
Originates from membrane of obturator foramen, passes under neck of femur and attaches to posterior part of greater trochanter (horizontal route)
What is the action of the obturator externus?
Adduction and lateral rotation of thigh
Describe the relative position of the gracilis
Most superficial and medial muscle of medial compartment
What is the gracilis sometimes surgically used for?
Sometimes transplanted to hand, forearm, or face beca
What is the origin and insertion of the gracilis?
Originates from body and inferior rami of pubis, attaches to superior medial surface of tibia
What is the action of the gracilis?
Adduction of thigh, flexion at knee
What is the innervation of the gracilis?
Obturator nerve (L2-L4)
What are the spinal root values of the obturator nerve?
L2-L4
RICE is a common method of treatment for muscle strain injuries. What does RICE stand for?
Rest, Ice, Compression, Elevation
What are the spinal root values of the femoral nerve?
L2-L4
Where are the relative positions of the inferior rami of the pubis and ischium?
Both part of the same loop bit, but pubic rami more medial (closer to pubis, which is the central bit of the pelvis), ischium rami more lateral
What is the origin and insertion of the Sartorius?
Originates from anterior superior iliac spine, attaches to superior medial surface of tibia
Which muscles insert into the superior medial surface of the tibia?
Sartorius and gracilis
Which muscles insert into the linea aspera?
Adductor longus, adductor brevis, adductor part of adductor magnus (hamstring part inserts into adductor tubercle of femur)
Which muscles originate from the body of the pubis?
Gracilis, adductor longus, adductor brevis (gracilis and adductor brevis also originates from inferior pubic rami)
Which muscles originate from the body and inferior rami of the pubis?
Gracilis and adductor brevis
