Podcast
Questions and Answers
Which movement is NOT associated with the action of the iliopsoas muscle?
Which movement is NOT associated with the action of the iliopsoas muscle?
- Trunk flexion
- Knee extension (correct)
- Hip flexion
- External rotation of the hip
The rectus femoris is unique compared to the other quadriceps muscles because it contributes to:
The rectus femoris is unique compared to the other quadriceps muscles because it contributes to:
- Hip adduction
- Hip flexion (correct)
- Hip extension
- Knee flexion
Which action is primarily driven by the gluteus maximus?
Which action is primarily driven by the gluteus maximus?
- Hip flexion
- Hip extension (correct)
- Hip internal rotation
- Hip abduction
What is a key difference in action between the anterior and posterior fibers of the gluteus medius?
What is a key difference in action between the anterior and posterior fibers of the gluteus medius?
Which muscle shares a common insertion point (greater trochanter of the femur) with both the gluteus medius and gluteus minimus?
Which muscle shares a common insertion point (greater trochanter of the femur) with both the gluteus medius and gluteus minimus?
The tensor fasciae latae (TFL) contributes to which movement?
The tensor fasciae latae (TFL) contributes to which movement?
Which of the following muscles is part of the adductor group?
Which of the following muscles is part of the adductor group?
The pes anserinus is the insertion point for which of the following muscles?
The pes anserinus is the insertion point for which of the following muscles?
The piriformis muscle is known to cause external rotation of the hip, which movement does it assist with?
The piriformis muscle is known to cause external rotation of the hip, which movement does it assist with?
Which quadriceps muscle does NOT originate on the femur?
Which quadriceps muscle does NOT originate on the femur?
All of the Vastus muscles have which action in common?
All of the Vastus muscles have which action in common?
Which of the following muscles is part of the hamstring group and inserts on the fibular head?
Which of the following muscles is part of the hamstring group and inserts on the fibular head?
Which action is a shared function of both the sartorius and gracilis muscles?
Which action is a shared function of both the sartorius and gracilis muscles?
Where does the popliteus muscle insert?
Where does the popliteus muscle insert?
Which pelvic movement results in hip extension and lumbar flexion?
Which pelvic movement results in hip extension and lumbar flexion?
Which of the following muscles is NOT a primary agonist for hip flexion?
Which of the following muscles is NOT a primary agonist for hip flexion?
Which group of muscles are the primary agonists for knee flexion?
Which group of muscles are the primary agonists for knee flexion?
Which of the following muscle pairings both contribute to hip external rotation?
Which of the following muscle pairings both contribute to hip external rotation?
Which muscle is a primary agonist for both hip internal rotation and hip abduction?
Which muscle is a primary agonist for both hip internal rotation and hip abduction?
Which movement is associated with a lateral pelvic tilt?
Which movement is associated with a lateral pelvic tilt?
Flashcards
Iliopsoas Action & Origin
Iliopsoas Action & Origin
Hip flexion and external rotation. Arises from lumbar vertebrae (T12-L5) and iliac fossa; inserts on lesser trochanter of femur.
Rectus Femoris Action & Origin
Rectus Femoris Action & Origin
Hip flexion and knee extension. Originates from AIIS; inserts on tibial tuberosity via the patellar tendon.
Gluteus Maximus Action & Origin
Gluteus Maximus Action & Origin
Hip extension and external rotation. Originates from posterior iliac crest, sacrum, and coccyx; inserts on gluteal tuberosity of the femur and IT band.
Gluteus Medius Action & Origin
Gluteus Medius Action & Origin
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Gluteus Minimus Action & Origin
Gluteus Minimus Action & Origin
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Adductor Group Actions & Origin
Adductor Group Actions & Origin
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Gracilis Action & Origin
Gracilis Action & Origin
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Piriformis Action & Origin
Piriformis Action & Origin
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Rectus Femoris (Knee) Action & Origin
Rectus Femoris (Knee) Action & Origin
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Vastus Muscles Action & Origin
Vastus Muscles Action & Origin
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Biceps Femoris Action & Origin
Biceps Femoris Action & Origin
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Semitendinosus/Semimembranosus Action & Origin
Semitendinosus/Semimembranosus Action & Origin
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Sartorius Action & Origin
Sartorius Action & Origin
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Popliteus Action & Origin
Popliteus Action & Origin
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Anterior Pelvic Tilt
Anterior Pelvic Tilt
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Posterior Pelvic Tilt
Posterior Pelvic Tilt
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Lateral Pelvic Tilt
Lateral Pelvic Tilt
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Pelvic Rotation
Pelvic Rotation
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Study Notes
Hip & Pelvis Movers
- Iliopsoas consists of the Psoas Major and Iliacus.
- Psoas Major originates from the lumbar vertebrae (T12-L5).
- Iliacus originates from the iliac fossa.
- Iliopsoas inserts on the lesser trochanter of the femur.
- Iliopsoas causes hip flexion and external rotation.
- Rectus Femoris originates from the anterior inferior iliac spine (AIIS).
- Rectus Femoris inserts on the tibial tuberosity via the patellar tendon.
- Rectus Femoris causes hip flexion and knee extension.
- Gluteus Maximus originates from the posterior iliac crest, sacrum, and coccyx.
- Gluteus Maximus inserts on the gluteal tuberosity of the femur and the iliotibial band (IT band).
- Gluteus Maximus causes hip extension and external rotation.
- Gluteus Medius originates from the lateral surface of the ilium.
- Gluteus Medius inserts on the greater trochanter of the femur.
- Gluteus Medius causes hip abduction and internal rotation (anterior fibers), and external rotation (posterior fibers).
- Gluteus Minimus originates from the lateral surface of the ilium (deep to gluteus medius).
- Gluteus Minimus inserts on the greater trochanter of the femur.
- Gluteus Minimus causes hip abduction and internal rotation.
- Tensor Fasciae Latae (TFL) originates from the anterior iliac crest.
- Tensor Fasciae Latae (TFL) inserts on the iliotibial band (IT band).
- Tensor Fasciae Latae (TFL) causes hip abduction, flexion, and internal rotation.
- The Adductor Group (Magnus, Longus, Brevis) originates from the pubis and ischium.
- The Adductor Group inserts on the linea aspera of the femur.
- The Adductor Group causes hip adduction, flexion (except magnus), and internal rotation.
- Gracilis originates from the pubis.
- Gracilis inserts on the pes anserinus (medial tibia).
- Gracilis causes hip adduction, knee flexion, and internal rotation.
- Piriformis originates from the anterior sacrum.
- Piriformis inserts on the greater trochanter of the femur.
- Piriformis causes external rotation and hip abduction.
Knee Movers
- The Quadriceps Femoris Group includes the Rectus Femoris, Vastus Lateralis, Medialis, and Intermedius.
- Rectus Femoris originates from the anterior inferior iliac spine (AIIS).
- Rectus Femoris inserts on the tibial tuberosity via the patellar tendon.
- Rectus Femoris causes knee extension and hip flexion.
- Vastus Lateralis, Medialis, and Intermedius originate from the linea aspera (VL & VM) and the anterior femur (VI).
- Vastus Lateralis, Medialis, and Intermedius insert on the tibial tuberosity.
- Vastus Lateralis, Medialis, and Intermedius cause knee extension.
- The Hamstring Group includes the Biceps Femoris.
- Biceps Femoris originates from the ischial tuberosity (long head) and the linea aspera (short head).
- Biceps Femoris inserts on the fibular head.
- Biceps Femoris causes knee flexion and hip extension.
- Semitendinosus & Semimembranosus originate from the ischial tuberosity.
- Semitendinosus & Semimembranosus insert on the medial tibia (pes anserinus for ST, posterior tibia for SM).
- Semitendinosus & Semimembranosus cause knee flexion, hip extension, and internal rotation.
- Sartorius originates from the anterior superior iliac spine (ASIS).
- Sartorius inserts on the pes anserinus (medial tibia).
- Sartorius causes hip flexion, knee flexion, and external rotation.
- Popliteus originates from the lateral condyle of the femur.
- Popliteus inserts on the posterior tibia.
- Popliteus causes knee flexion and internal rotation of the tibia.
Pelvic Movements & Hip Joint Movements
- Anterior Pelvic Tilt results in hip flexion and lumbar extension.
- Posterior Pelvic Tilt results in hip extension and lumbar flexion.
- Lateral Pelvic Tilt results in hip abduction (on one side) and adduction (on the opposite side).
- Pelvic Rotation results in hip internal or external rotation, depending on the movement direction.
Agonist Muscles for Common Movements
- Hip Flexion: Iliopsoas, Rectus Femoris, Sartorius, TFL
- Hip Extension: Gluteus Maximus, Hamstrings
- Hip Abduction: Gluteus Medius, Gluteus Minimus, TFL
- Hip Adduction: Adductor Magnus, Longus, Brevis, Gracilis
- Knee Flexion: Hamstrings, Sartorius, Gracilis
- Knee Extension: Quadriceps Group
- Hip External Rotation: Gluteus Maximus, Piriformis
- Hip Internal Rotation: Gluteus Medius (anterior), Gluteus Minimus
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