Muscles of Leg

Question 1

What are the muscles of the gluteal region?

Answer 1

• Gluteus Maximus
• Gluteus Medius
• Gluteus Minimus
• Piriformis
• Obturator Internus
• Superior Gemelli
• Inferior Gemelli
• Quadratus Femoris

Question 2

What are the muscles of the Anterior compartment of the Thigh? (7 muscles)

Answer 2

(7 muscles)

• Iliopsoas
• Sartorius
• Rectus Femoris
• Vastus Medialis
• Vastus Lateralis
• Vastus Intermedialis
• Tensor Fascia Latae

Question 3

What are the muscles of the Medial compartment of the Thigh? (6 muscles)

Answer 3

• Obturator Externus
• Pectineus
• Adductor Brevis
• Adductor Longus
• Adductor Magnus
• Gracilis

Question 4

What are the muscles of the Posterior compartment of the Thigh?

Answer 4

• Semimembranosus
• Semitendinosus
• Biceps femoris (long head / short head)

Question 5

What muscles make up the Hamstrings and what is there common origin?

Answer 5

• Semimembranosus
• Semitendinosus
• Biceps Femoris LONG head
• Adductor Magnus (hamstring part)

Common Origin = ISCHIAL TUBEROSITY

Question 6

Describe the Quadriceps

Answer 6

Quadriceps Femoris is made up of 4 Muscles:

• Rectus Femoris
• Vastus Medialis
• Vastus Lateralis
• Vastus Intermedialis

All join to form 1 tendon, the Quadriceps Femoris tendon that attached to the patella, (It is continuous with the Patella tendon that attches the patella to the Tibial tuberosity.

Question 7

What are the boundaries and contents of the femoral triangle?

Answer 7

Superior Boundary = Inguinal ligament
Medial Boundary = Adductor Longus
Lateral Boundary = Sartorius
Floor = Pectineus (medially) and Iliopsoas (laterall)
Roof = Fascia Lata

Contents:
NAVeL
Femoral Nerve
Femoral Artery 
Femoral Vein
Lymphatic nodes

Question 8

What are the boundaries and contents of the popliteal fossa?

Answer 8

SuperoMedial Boundary = Semimembranosus
SuperoLateral Boundary = Biceps Femoris (LONG head)
InferoMedial Boundary = Gastronemius (Medial head)
InferoLateral Boundary = Gastronemius (Lateral head) AND Plantaris
Floor = Knee Joint and Femur
Roof = Popliteal Fascia

CONTENTS:
(Medial to Lateral)
Popliteal Artery
Popliteal Vein
Tibial Nerve
Common Fibular nerve

Question 9

What are the muscles of the anterior compartment of the Leg? (4 Muscles)

Answer 9

(from Medial to larteral)

• Tibularis Anterior
• Extensor Hallucis Longus
• Extensor Digitorum Longus
• Fibularis Tertius

Question 10

What nerve innervates the muscles in the anterior compartment of the Leg?

Answer 10

Deep Fibular Nerve

Question 11

What are the 2 Muscles in the Lateral compartment of the Leg? What is there innervation ? What is their common function?

Answer 11

• Fibularis Longus
• Fibularis Brevis

Innervated by Superficial Fibular Nerve
Common Function : Eversion of foot

Question 12

Describe the superficial muscles in the posterior compartment of the leg?
Innervation, Insertion, common function

Answer 12

Gastronemius (medial and lateral heads)
Soleus
Plantaris

Innervated by the Tibial nerve.
Common Function = Plantar-Flexion of foot

Gastroneumius and Soleus form the Calcaneal tendon and insert into the calcaneus. Plantaris tendon blends with the calcaneal tendon.

Question 13

Describe the deep muscles in the posterior compartment of the leg.
Innervation

Answer 13

• Popliteus
• Tibialis Posterior
• Flexor Digitorum Longus
• Flexor Hallucis Longus

All innervated by Tibial Nerve