Medial and Posterior Thigh

Question 1

What muscles makes up the medial thigh?

Answer 1

adductor longus, adductor brevis,adductor magnus, gracilis, obturator externus

Question 2

Where do the adductor muscles insert?

Answer 2

linea aspera of the femur

Question 3

What is the origin, insertion, innervation, and action of the adductor longus ?

Answer 3

Origin: body of pubis
Insertion: middle third of linea aspera
Innervation: obturator nerve
action: adducts thigh

Question 4

What is the origin, insertion, innervation, and action of the adductor brevis?

Answer 4

Origin: body and inferior ramus of the pubis
Insertion: pectineal line
Innervation: obturator nerve
action:adducts thigh and to some extent flexes it

Question 5

What is the origin, insertion, innervation, and action of the adductor magnus?

Answer 5

Origin:adductor part-inferior ramus of pubis
hamstring part- ischial tuberosity
Insertion:adductor-gluteal tuberosity
hamstring- adductor tubercle of femur
Innervation:adductor-obturator nerve
hamstring- tibial part of sciatic nerve
action: adducts thigh, also flexes, and hamstirng part extends thigh

Question 6

What is the origin, insertion, innervation, and action of the gracilis ?

Answer 6

Origin: body and inferior ramus of pubis
Insertion: superior part of medial surface of tibia
Innervation: obturator nerve
action:adducts thigh, flexes leg, rotates leg medially

Question 7

What are the two parts of the adductor magnus?

Answer 7

adductor (adducts and flexes thigh, obturator nerve) and hamstring parts (extends , sciatic)

Question 8

What is the opening of the adductor canal?

Answer 8

the apex of the femoral triangle

Question 9

What enters the adductor canal?

Answer 9

Femoral artery, vein, saphenous nerve, and nerve to vastus mediallis

Question 10

what is the adductor canal?

Answer 10

a fibrous tunnel that prevents the femoral vessels from getting squeeze closed by the contraction of the large thigh muscles

Question 11

where do the femoral artery and vein exit the adductor canal?

Answer 11

Adductor hiatus and then continue as the popliteal artery and vein behind the knee

Question 12

what is the largest nerve in the posterior thigh?

Answer 12

sciatic nerve

Question 13

What are the branches of the sciatic nerve?

Answer 13

Tibial nerve and common fibular nerve

Question 14

What makes up the hamstring muscles?

Answer 14

Semitendinosus, semimembranosus, biceps femoris

Question 15

What is the main actions of the hamstring?

Answer 15

Flexion of the knee and extension of the hip.

Question 16

What is sciatica?

Answer 16

Pain that radiates along the path of the sciatic nerve, which branches from the lower back through the hips and buttocks and down each leg.

Question 17

What is the origin, insertion, innervation, and action of the Semitendinosus?

Answer 17

origin:ischial tuberosity
Insertion: superior part of the medial surface of tibia
Innervation:tibial division of sciatic nerve
action: extend hip joint , flex knee and medially rotate it when flexed

Question 18

What is the origin, insertion, innervation, and action of the Semimembranous?

Answer 18

origin:ischial tuberosity
Insertion: posterior part of medial condyle of tibia
Innervation: tibial division of sciatic nerve
action:extend hip joint , flex knee and medially rotate it when flexed

Question 19

What is the origin, insertion, innervation, and action of the Biceps femoris?

Answer 19

origin: Long head- ischial tuberosity
short head - linea aspera and lateral supracondylar line
Insertion:lateral side of head of fibula
Innervation:long head- tibial division of sciatic nerve
short head-common fibular division of sciatic nerve
action: flexes knee joint and laterally rotates it when flexed , long head extends hip joint