Anatomy Review: Upper Legs

Question 1

HM Complex: Biceps Femoris (long head) function

Answer 1

Concentric:

Accelerates knee flexion, hip extension & tibial external rotation

Eccentric:

Decelerate knee extension, hip flexion & tibial internal rotation

Isometric:

Stabilizes the knee and LPHC

Question 2

HM Complex: Biceps Femoris (short head) function

Answer 2

Short-head does not affect hip

Concentric:

Accelerates knee flexion and tibial external rotation

Eccentric:

Decelerates knee extension and tibial internal rotation

Isometric:

Stabilizes the knee

Question 3

HM Complex: Semimembranosus function

Answer 3

Concentric:

Accelerates knee flexion, hip extension & tibial internal rotation

Eccentric:

Decelerates knee extension, hip flexion & tibial external rotation

Isometric:

Stabilizes the knee & LPHC

Question 4

HM Complex: Semitendinosus function

Answer 4

Concentric:

Accelerates knee flexion, hip extension & tibial internal rotation

Eccentric:

Decelerates knee extension, hip flexion & tibial external rotation

Isometric:

Stabilizes the knee and LPHC

Question 5

Quadriceps: Vastis Lateralis

Answer 5

Concentric:

Accelerates knee extension

Eccentric:

Decelerates knee flexion

Isometric:

Stabilizes the knee

Question 6

Quadriceps: Vastus Medialis

Answer 6

Concentric:

Accelerates knee extension

Eccentric:

Decelerates knee flexion

Isometric:

Stabilizes the knee

Question 7

Quadriceps: Vastus Intermedius

Answer 7

Concentric:

Accelerates knee extension

Eccentric:

Decelerates knee flexion

Isometric:

Stabilizes the knee

Question 8

Quadriceps: Rectus Femoris

Answer 8

Concentric:

Accelerates knee extension AND hip flexion

Eccentric:

Decelerates knee flexion AND hip extension

Isometric:

Stabilizes the knee AND LPHC

Question 9

Hip Musculature

Adductor Magnus: Anterior fibers

Answer 9

Concentric:

Accelerates hip adduction, flexion and internal rotation

Eccentric:

Decelerates hip abduction, extension and external rotation

Isometric:

DYNAMICALLY stabilizes LPHC

Question 10

Hip Musculature

Adductor Magnus: Posterior fibers

Answer 10

Concentric:

Accelerates hip adduction, extension, and EXTERNAL rotation

Eccentric:

Decelerates hip abduction, flexion and INTERNAL rotation

Isometric:

ISOMETRICALLY stabilizes the LPHC

Question 11

Hip Musculature

Adductor Brevis: function

Answer 11

Concentric:

Accelerates hip adduction, flexion & internal rotation

Eccentric:

Decelerates hip abduction, extension, and external rotation

Isometric:

Stabilizes the LPHC

Question 12

Hip Musculature

Gracilis: function

Answer 12

Concentric:

Accelerates hip adduction, flexion & assists in TIBIAL internal rotation

Eccentric:

Decelerates hip abduction, extension & external rotation

Isometric:

Stabilizes the knee & LPHC