Exam 1 posterior thigh and popliteal fossa

Question 0

Which nerve supplies the back of the thigh with sensory fibers and extends as far downward as the popliteal fossa?

Answer 0

Sciatic Nerve

Question 1

What superficial vein drains the back of the leg?

Answer 1

Small Saphenous vein

Question 2

What are the names of the individual muscles which make up the hamstrings

Answer 2

Semimembranosus
Semitendinosus
Biceps Femoris

Question 3

What two joints do the hamstring muscles span? What is the clinical significance of this?

Answer 3

The hip and the knee. It can cause movement at either or both joints because it is a 2-joint muscle

Question 4

What are the principle actions of the hamstrings? How are they most commonly injured?

Answer 4

Extension at the hip joint and flexion at the knee joint. They are most commonly injured with running, jumping, and quick-start sports. The exertion required to excel in these sports may tear part of the proximal attachments of the hamstrings from the Ischial tuberosity.

Question 5

What arteries supply most of the blood to the hamstring muscles

Answer 5

Perforating arteries that arise from the deep femoral artery. Inferior gluteal artery also provides blood supply to upper part of hamstrings

Question 6

What muscles make up the boundaries of the popliteal fossa?

Answer 6

Superolaterally by the biceps femoris
Superomedially by the semimembranosus
Inferolaterally by and inferomedially by the lateral and medial heads of the gastrocnemius
Posteriorly by skin and popliteal fascia

Question 7

Name the arteries that arise from the popliteal artery and course medially and laterally around the knee joint?

Answer 7

Superior medial, inferior medial, superior lateral, and inferior lateral genicular arteries

Question 8

What three slender muscles converge to an apex on the medial side of the proximal end of the tibia?

Answer 8

Gracilis, Semitendinosus, Sartorius

Question 9

What nerve supplies the hamstring muscles? The adductors? The sartorius and quadrate group? The tensor fascia lata?

Answer 9

Hamstring- sciatic N.

Adductors-Obturator N. (L2,3,4)

Pectineus- L2,3

Sartorius and Quadrate group- Femoral N.

TFL- Superior Gluteal N.

Question 10

Which muscle has a membranous tendon of origin?

Answer 10

Semimembranosus

Question 11

Which muscle lies on the medial side of the thigh and has a round and remarkably long tendon of origin?

Answer 11

Semitendinosus