Gluteal region and thigh dissection Flashcards
Name the 3 gluteal muscles
Gluteus maximus
Gluteus medius
Gluteus minimus
Name a short lateral rotator found in the pelvis
Piriformis
Which is the most superficial of the gluteal muscles?
Gluteus maximus
State the origin of gluteus maximus
Ilium and sacrum
State the insertion of gluteus maximus
Gluteal tuberosity on the posterior surface of the femur
Iliotibial tract
Describe the iliotibial tract
Thick fibrous band running down the lateral side of the thigh to the knee
Which muscles lie deep to gluteus maximus?
Gluteus medius and Gluteus minimus
Where do gluteus minimus and medius originate?
Ilium
Where do gluteus minimus and medius insert?
Greater trochanter of the femur
Give the origin of piriformis muscle
Sacrum
State the insertion of piriformis muscle
Greater trochanter of the femur
State the action of piriformis
Laterally rotates the thigh at the hip
Why is piriformis an important landmark?
Sciatic nerve can be seen passing below it
What can be observed as well as the sciatic nerve below piriformis?
A series of short rotator muscles
Which nerves supply the gluteal muscles?
Gluteal nerves
State the travel of the inferior gluteal nerve
Passes out of the pelvis with the inferior gluteal vessels below piriformis muscle to innervate gluteus maximus
State the travel of the superior gluteal nerve
Passes out of the pelvis with the superior gluteal vessels above piriformis to innervate the gluteus medius and minimus muscles
What is the most prominent nerve in the gluteal region?
Sciatic nerve
Describe the travel of the sciatic nerve
Enters the gluteal region through the greater sciatic foramen under the inferior border of piriformis in the posterior thigh
What is the greater sciatic foramen bordered by?
Greater sciatic notch
Sacrospinous ligament
Sacrotuberous ligament
Name the muscles of the posterior compartment
Biceps femoris
Semitendinosus
Semimembranosus
What are the muscles of the posterior compartment commonly known as?
Hamstrings
Where do the hamstrings originate?
Ischial tuberosity
Where does the long head of biceps femoris originate?
Ischial tuberosity
Where does the short head of biceps femoris originate?
Shaft of the femur
Where does biceps femoris insert?
Head of the fibula
On what side of the posterior of the leg is the biceps femoris?
Lateral
On which side of the posterior of the leg are semimembranosus and semitendinosus?
Medial
What does semitendinosus end in?
Long tendon that passes over semimembranosus
Where do both semitendinosus and semimembranosus insert?
Tibia
Which nerve supplies the hamstrings?
Tibial component of the sciatic nerve
Where does the sciatic nerve pass?
Through the posterior compartment of the thigh
Where is the popliteal fossa located?
Back of the knee
What is the shape of the popliteal fossa?
Diamond
What are the superior boundaries of the popliteal fossa?
Semimembranosus
Semitendinosus (medially)
Biceps femoris (Laterally)
What are the inferior boundaries of the popliteal fossa?
Two heads of gastrocnemius
What happens to the sciatic nerve in the popliteal fossa?
Divides into tibial and common fibular
Where does the common fibular nerve lie in the popliteal fossa?
Medial to tendon of biceps femoris
What happens to the common fibular nerve when it reaches the lateral aspect of the fossa?
Curves forwards around the neck of the fibula
What are the popliteal vessels a continuation of?
The femoral vessels
What does the short saphenous vein drain?
Lateral side of the foot
What does the short saphenous vein merge with in the popliteal fossa?
Popliteal vein
What type of joint is the hip joint?
Ball and socket
What is the hip joint between?
Head of femur
Acetabulum
What are the movements of the thigh at the hip?
extension flexion abduction adduction lateral (external) rotation medial (internal) rotation