Hip Musculature

Question 1

Adductor Longus
Adductor Magnus-Anterior fibers
Adductor Brevis
Pectineus

Answer 1

★ Insertion
Adductor Magnus-Anterior fibers: Linea aspera of the femur
Proximal 1/3 of the Linea aspera of the femur
★ Isolated function
Concentrically accelerates hip adduction, flexion, and internal rotation
★ Integrated function
Eccentrically decelarates hip abduction, extension, and external rotation
Isometrically stabilizes the LPHC
(Adductor Magnus - anterior fibers dynamically stabilize the LPHC)

Question 2

Adductor Magnus - Posterior fibers

Answer 2

★ Insertion
Adductor tubercle on femur
★ Isolated function
Cncentrically accelerates hip adduction, extension , and external rotation
★ Integrated function
Eccentrically decelarates hip abduction, flexion, and internal rotation
Isometrically stabilizes the LPHC

Question 3

Gracilis

Answer 3

★ Insertion
Proximal medial surface of the tibia
★ Isolated function
Concentrically accelerates hip adduction, flexion, and internal rotation
Assists in tibial internal rotation
★ Integrated function
Eccentrically decelerates hip abduction, extension and external rotation
Isometrically stabilizes the LPHC and the knee

Question 4

Gluteus Medius

Answer 4

★ Insertion
Lateral surface of the greater trochanter on the femur
★ Isolated function
Concentrically accelerates hip abduction and internal rotation (anterior fibers)
Concentrically accelerates hip abduction and external rotation (posterior fibers)
★ Integrated function
Eccentrically decelerates hip adduction and external rotation (anterior fibers)
Eccentrically decelerates hip adduction and internal rotation (posterior fibers)
Isometrically stabilizes the LPHC

Question 5

Gluteus Minimus

Answer 5

★ Insertion
Greater trochanter of the femur
★ Isolated function
Concentrically accelerates hip abduction and internal rotation
★ Integrated function
Eccentrically decelerates hip adduction and external rotation
Isometrically stabilizes the LPHC

Question 6

Gluteus Maximus

Answer 6

★ Insertion
Gluteal tuberosity of the femur and iliotibial tract
★ Isolated function
Concentrically accelerates hip extension and external rotation
★ Integrated function
Eccentrically decelerates hip flexion and internal rotation
Decelerates tibial internal rotation via the iliotibial band
Isometrically stabilizes the LPHC

Question 7

Tensor Fascia Latae (including the iliotibial band)

Answer 7

★ Insertion
Proximal 1/3 of the iliotibial band
★ Isolated function
Concentrically accelerates hip flexion, abduction, and internal rotation
★ Integrated function
Eccentrically decelerates hip extension, adduction, and external rotation
Isometrically stabilizes the LPHC

Question 8

Psoas

Answer 8

★ Insertion
Lesser trochanter of the femur
★ Isolated function
Concentrically accelerates hip flexion and external rotation
Concentrically extends and rotates lumbar spine
★ Integrated function
Eccentrically decelerates hip internal rotation and hip extension
Isometrically stabilizes the LPHC

Question 9

Iliacus

Answer 9

★ Insertion
Lesser trochanter of the femur
★ Isolated function
Concentrically accelerates hip flexion and external rotation
★ Integrated function
Eccentrically decelerates hip internal rotation and hip extension
Isometrically stabilizes the LPHC

Question 10

Sartorius

Answer 10

★ Insertion
Proximal medial surface of the tibia
★ Isolated function
Concentrically accelerates hip flexion, external rotation, and abduction
Concentrically accelerates knee flexion and internal rotation
★ Integrated function
Eccentrically decelerates hip extension and internal rotation
Eccentrically decelerates knee extension and external rotation
Isometrically stabilizes the LPHC and knee

Question 11

Piriformis

Answer 11

★ Insertion
The greater trochanter of the femur
★ Isolated function
Concentrically accelerates hip external rotation, abduction, and extension
★ Integrated function
Eccentrically decelerates hip internal rotation, adduction, and flexion
Isometrically stabilizes the hip and sacroiliac joints