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Personal Training > Knee Flexors and extensors > Flashcards

Knee Flexors and extensors Flashcards

1
Q

Origin of biceps femoris (long head)

A

Ischial tuberosity of the pelvis

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2
Q

Insertion of biceps femoris (long head)

A

Head of the fibula

Lateral collateral ligament (LCL) and lateral consuls of tibia

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3
Q

Isolated fcn of biceps femoris (long head)

A

Concentrically accelerates knee flexing and hip extension

Tibial external rotation

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4
Q

Integrated fcn of biceps femoris ( long head)

A

Eccentrically decelerates knee extension, hip flex ion, tibial internal rotation( at mid stance of gait cycle) and stabilized LPHC

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5
Q

Origin of biceps femoris ( short head)

A

Lower one third of the posterior aspect of the femur

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6
Q

Insertion of biceps femoris (short head)

A

Head of fibula

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7
Q

Isolated fcn biceps femoris (short head)

A

Concentrically accelerates knee flexion and tibial external rotation

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8
Q

Integrated fcn of biceps femoris (short head)

A

Eccentrically decelerates knee extension, tibial internal rotation and isometrically stabilizes the knee

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9
Q

Origin semimbranosus

A

Ischial tuberosity of the pelcis

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10
Q

Insertion Semimembranosus

A

Posterior aspect of the medial tibial condyle of the tibia

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11
Q

Isolated function of semimebranosus

A

Concentrically accelerates knee flexion, hip extension, and tibial internal rotation

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12
Q

Integrated function of semimebranosus

A

Eccentrically decelerates knee extension, hip flexion, to be a external rotation, and isometrically stabilizes the knee and LPHC

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13
Q

Origin of the semitendinosis

A

Ischial tuberosity of the pelvis and part of the sacrotuberous ligament

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14
Q

Insertion of semitendinosis

A

Proximal aspect of the medial tibial condyle of the tibia

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15
Q

Isolated function of semitendinosis

A

Concentrically accelerates knee flexion, hip extension, and tibial internal rotation

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16
Q

Integrated function of semitendinosis

A

Eccentrically decelerates knee extension, hip flexion, tibial external rotation, and isometrically stabilizes the knee and LPHC

17
Q

Origin of Vastus lateralis

A

Greater trochanter and Linnea aspera of the femur, lateral region of the gluteal tuberosity

18
Q

Insertion Vastus lateralis

A

Base of patella and tibial tuberosity of the tibia

19
Q

Isolated function Vastus lateralis

A

Concentrically accelerates knee extension

20
Q

Integrated function of Vastus lateralis

A

Eccentrically decelerates knee flexion, adduction and internal rotation. Isometrically stabilizes the knee

21
Q

Origin of Vastus medialis

A

Lower region of intertrochanteric line, medial lip of lines aspera, proximal medial supracondylar line of the femur

22
Q

Insertion of vastus medialis

A

Base of the patella and tibial tuberosity of the tibia

23
Q

Isolated function of vastus medialis

A

Concentrically accelerates knee extension

24
Q

Integrated function of vastus medialis

A

Eccentrically decelerates need flexion, adduction and internal rotation. Isometrically stabilizes the knee

25
Q

Origin of Vastus intermedius

A

Anterior lateral regions of the upper two thirds of the femur

26
Q

Insertion of Vastus intermedius

A

Of the patella and tibial tuberosity of the tibia

27
Q

Isolated function of Vastus intermedius

A

Concentrically accelerates knee extension

28
Q

Integrated function of Vastus intermedius

A

Eccentrically decelerates knee flexion, adduction and internal rotation.Isometric ally stabilize the knee

29
Q

Origin of rectus femoris

A

Anterior inferior iliac spine of the pelvis

30
Q

Insertion of rectus femoris

A

Base of the patella and tibial tuberosity of the tibia

31
Q

Isolated function of rectus femoris

A

Concentrically accelerates knee extension and hip flexion

32
Q

Integrated function of rectus femoris

A

Eccentrically decelerates knee flexion, adduction and internal rotation. Decelerates hip extension. Isometrically stabilizes the knee and LPHC

33
Q

What are the knee flexors?

A

Hamstrings: biceps femoris ( long head), biceps femoris (short head), semimebranosus, semitendinosis

34
Q

What are the knee extensors?

A

Quadriceps: Vastus lateralis, Vastus medialis, Vastus intermedius, and rectus femoris

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