Posterior Hip Thigh Popliteal Fossa

Question 1

Sacral Coccygeal Plexus has how many nerve roots?

Answer 1

5 - L4, L5, S1, S2, S3

Question 2

What three nerve roots come off laterally?

Answer 2

Superior Gluteal Nerve L4, L5, S1
Inferior Gluteal Nerve L5, S1, S2
Nerve to the piriformis S1, S2

Question 3

What four roots come off medially

Answer 3

Nerve to the quadratus femoris (also innervates the inferior gemellus) L4, L5, S1
Nerve to the obturator internus (also innervates the superior gemellus) L5, S1, S2
Posterior Femoral Cutaneous Nerve S1- S3

Question 4

Main trunk of the sacral coccygeal plexus is the ____ nerve

Answer 4

Sciatic Nerve

Question 5

Medial Component of Sciatic Nerve becomes the ___ nerve

Answer 5

Tibial Nerve L4, L5, S1, S2, S3

Question 6

Lateral Component of the Sciatic Nerve becomes the ____ nerve

Answer 6

Common Fibular/ Peroneal Nerve L4, L5, S1, S2

Question 7

Skin of the buttocks innervated by what three nerves

Answer 7

Superior Cluneal Nerve
Middle Cluneal Nerve
Inferior Cluneal Nerve

Question 8

Gluteus Maximus

Answer 8

Origin: sacrum, coccyx, posterior aspect of the ilium
Insertion: posterior aspect of the iliotibial band
Innervated: inferior gluteal nerve
Action: hip extension and external rotation

Question 9

Gluteus Medius

Answer 9

Origin: posterior aspect of the ilium
Insertion: Lateral aspect of the greater trochanter
Innervated: superior gluteal nerve
Action: hip abduction, hip internal rotation

Question 10

Gluteus Minimis

Answer 10

Origin: posterior ilium
Insertion: Anterior aspect of the greater trochanter
Innervated: Superior gluteal nerve
Action: Hip abduction and internal rotation

Question 11

Piriformis

Answer 11

Origin: Anterior Sacrum
Insertion: superior aspect of the greater trochanter
Innervated: Nerve to the piriformis
Action: Hip external Rotation

Travels through the lesser sciatic notch

Question 12

Superior Gemellus

Answer 12

Origin: Ischial spine
Insertion: Medial aspect of the greater trochanter
Innervated: nerve to the obturator internus
Action: Hip external rotation; dynamic stabilization of the hip

Question 13

Obturator Internus

Answer 13

Origin: Obturator Foreamen
Insertion: Medial aspect of the greater trochanter
Innervated: nerve to the obturator internus
Action: Hip external rotation; dynamic stabilization of the hip

Question 14

Inferior Gemellus

Answer 14

Origin: Ischial tuberosity
Insertion: Medial aspect of the greater trochanter
Innervated: Nerve to the quadratus femoris
Action: Hip external rotation; dynamic stabilization of the hip

Question 15

Quadratus Femoris

Answer 15

Origin: Ischial Tuberosity
Insertion: Medial aspect of the greater trochanter
Innervated: Nerve to the quadratus femoris
Action: Hip external rotation; dynamic stabilization of the hip

Question 16

Which three nerve travels through the greater sciatic notch

Answer 16

superior gluteal nerve, inferior gluteal nerve and sciatic nerve

Question 17

Semitendinosis

Answer 17

Origin: Ischial Tuberosity
Insertion: Pes Anserene
Innervated: Sciatic Nerve
Action: Extend the hip and flex the knee

Question 18

Semimembranosis

Answer 18

Origin: Ischial Tuberosity
Insertion: Posterior medial tibia, medial meniscus
Innervated: Sciatic Nerve
Action: Extend the hip and flex the knee

Question 19

Biceps Femoris

Answer 19

Origin: Long head- ischial tuberosity; short head- posterior femur
Insertion: Fibular head
Innervated: Sciatic Nerve
Action: Extend the hip and flex the knee except the short head which just flexes the knee

Question 20

Borders of the popliteal fossa

Answer 20

Superior lateral: Biceps Femoris
Superior medial: semimembranosis, semitendonosis
Inferior lateral: lateral gastrocnemius
Inferior medial: medial gastrocnemius
Contents: popliteal artery, vein, tibial nerve, common fibular nerve, posterior femoral cutaneous nerve