Muscles 3
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![Page 1: Muscles 3](https://reader035.fdocuments.net/reader035/viewer/2022081413/54663f55af795997368b5076/html5/thumbnails/1.jpg)
Muscles 3
McKinley and O’Laughlin
Chapter 12
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Introduction
List the 4 compartments of the thigh. Anterior - extend knee, flex thigh Posterior - flex knee, extend thigh Lateral - abduct thigh Medial - adduct thigh
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Introduction
What structure forms the compartments of the thigh? Fascia lata
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Move the Coxal Joint/Thigh
Name: Psoas major Origin: Transverse processes of L1-L5 Insertion: Lesser trochanter of femur Action: Flex hip. Rotate thigh laterally. Flex
vertebral column.
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Move the Coxal Joint/Thigh
Name: Iliacus Origin: Iliac fossa Insertion: Lesser trochanter of femur Action: Flex hip. Rotate thigh laterally.
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Introduction
By what name are the iliacus and psoas major referred to after they pass deep to the inguinal ligament? Iliopsoas
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Move the Coxal Joint/Thigh
Name: Sartorius Origin: Anterior superior iliac spine Insertion: Proximomedial tibia Action: Abduct and flex hip. Laterally rotate
thigh. Flex knee.
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Move the Coxal Joint/Thigh
Name: Adductor longus Origin: Pubis (below crest) Insertion: Linea aspera (middle) Action: Adduct and flex hip. Laterally rotate
thigh
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Move the Coxal Joint/Thigh
Name: Adductor brevis Origin: Body and inferior ramus of pubis Insertion: Linea aspera (proximal) Action: Adduct and flex hip. Laterally rotate
thigh
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Move the Coxal Joint/Thigh
Name: Gracilis Origin: Body and inferior ramus of pubis Insertion: Proximomedial tibia Action: Adduct and flex hip. Medially rotate
thigh
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Move the Coxal Joint/Thigh
Name: Pectineus Origin: Pectineal line of pubis Insertion: Pectineal line of femur Action: Adduct and flex hip. Laterally rotate
thigh
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Move the Coxal Joint/Thigh
Name: Adductor magnus Origin: Inferior ramus of pubis. Ramus of
ischium. Ischial tuberosity. Insertion: Linea aspera. Medial epicondyle
of femur (adductor tubercle) Action: Adduct and flex hip. Laterally rotate
thigh Hamstring part: extend thigh
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Move the Coxal Joint/Thigh
Name: Tensor Fasciae Latae Origin: Anterior superior iliac spine.
Anterior iliac crest. Insertion: Lateral tibial condyle via iliotibial
tract. Action: Abduct hip. Medially rotate thigh.
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Move the Coxal Joint/Thigh
Name: Gluteus maximus Origin: Iliac crest. Dorsal sacrum and
coccyx Insertion: Gluteal tuberosity (proximal linea
aspera). Iliotibial tract. Action: Extend hip. Laterally rotate thigh.
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Move the Coxal Joint/Thigh
Name: Gluteus medius Origin: Lateral ilium Insertion: Greater trochanter (lateral) Action: Abduct hip. Medially rotate thigh.
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Move the Coxal Joint/Thigh
Name: Gluteus minimus Origin: Inferolateral ilium Insertion: Greater trochanter (anterior) Action: Abduct hip. Medially rotate thigh.
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Move the Coxal Joint/Thigh
Name: Piriformis Origin: Anterior sacrum Insertion: Greater trochanter (superior) Action: Abduct flexed hip. Laterally rotate
extended thigh.
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Move the Coxal Joint/Thigh
Name: Biceps femoris Origin:
Long head: Ischial tuberosity Short head: Distal linea aspera
Insertion: Fibular head Action: Flex knee and laterally rotate leg.
Extend thigh.
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Move the Coxal Joint/Thigh
Name: Semimembranosus Origin: Ischial tuberosity Insertion: Posterior to medial tibial condyle Action: Flex knee and medially rotate leg.
Extend thigh.
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Move the Coxal Joint/Thigh
Name: Semitendinosus Origin: Ischial tuberosity Insertion: Proximomedial tibia Action: Flex knee and medially rotate leg.
Extend thigh.
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Move the Knee/Leg
What is the collective name of the group of 4 extensors of the knee in the anterior compartment of the thigh? Quadriceps femoris group
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Move the Knee/Leg
What is the common insertion of the group of 4 extensors of the knee in the anterior compartment of the thigh? Tibial tuberosity
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Move the Knee/Leg
What is the common action of the group of 4 extensors of the knee in the anterior compartment of the thigh? Extend leg at knee
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Move the Knee/Leg
Of the 4 extensors in the anterior comportment of the thigh, which crosses the hip joint and is a flexor of the hip? Rectus femoris
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Move the Knee/Leg
Name: Rectus femoris Origin: Anterior inferior iliac spine. Groove
superior to acetabulum Insertion: Tibial tuberosity via quadriceps
femoris tendon Action: Extend knee. Flex thigh
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Move the Knee/Leg
Name: Vastus lateralis Origin: Greater trochanter. Linea aspera Insertion: Tibial tuberosity via quadriceps
femoris tendon Action: Extend knee
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Move the Knee/Leg
Name: Vastus medialis Origin: Medial femur. Linea aspera Insertion: Tibial tuberosity via quadriceps
femoris tendon Action: Extend knee
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Move the Knee/Leg
Name: Vastus intermedius Origin: Anterior and lateral femur Insertion: Tibial tuberosity via quadriceps
femoris tendon Action: Extend knee
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Compartments of the Thigh
List all of the muscles of the anterior compartment of the thigh that cross the knee joint? 4 Quads
Rectus femoris Vastus intermedius, lateralis, medialis
Sartorius
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Compartments of the Thigh
List all of the muscles of the medial compartment of the thigh that cross the knee joint? Gracilis
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Compartments of the Thigh
List all of the muscles of the lateral compartment of the thigh that cross the knee joint? Tensor fasciae latae
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Compartments of the Thigh
List all of the muscles of the posterior compartment of the thigh that cross the knee joint? 3 Hamstrings
Biceps femoris Semitendinosus Semimembranosus
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Leg Muscles
What is the anatomical term for the muscles of the leg? Crural muscles
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Leg Muscles
How many compartments lie within the leg? 3
List the compartments that lie within the leg. Anterior Lateral Posterior
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Anterior Compartment of the Leg
Name: Extensor digitorum longus Origin: Lateral tibial condyle. Anterior
fibula. Interosseus membrane Insertion: Extensor expansions of digits 2-5 Action: Extend digits 2-5. Dorsiflex foot
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Anterior Compartment of the Leg
Name: Extensor hallucis longus Origin: Anterior fibula. Interosseus
membrane Insertion: Dorsal base of distal phalanx of
hallux Action: Extend digits 1. Dorsiflex foot
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Anterior Compartment of the Leg
Name: Tibialis anterior Origin: Lateral condyle and surface of tibia.
Interosseus membrane Insertion: (medial and inferior) Medial
cuneiform and base of 1st metatarsal Action: Dorsiflex and invert foot
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Lateral Compartment of the Leg
Name: Fibularis longus Origin: Head and lateral fibula Insertion: (inferior) Medial cuneiform and
base of 1st metatarsal Action: Plantar flex and evert foot
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Lateral Compartment of the Leg
Name: Fibularis brevis Origin: Lateral fibula Insertion: Tuberosity (on base) of 5th
metatarsal Action: Evert and weakly plantar flex foot
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Posterior Compartment of the Leg
Name: Gastrocnemius Origin:
Lateral head: Lateral to lateral femoral condyle Medial head: Superior to medial femoral
condyle
Insertion: Tuberosity of calcaneus via tendo calcaneus (Achilles tendon)
Action: Plantar flex foot. Flex knee
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Posterior Compartment of the Leg
Name: Soleus Origin: Soleal line (posterior tibia).
Posterior fibula Insertion: Tuberosity of calcaneus via tendo
calcaneus (Achilles tendon) Action: Plantar flex foot
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Posterior Compartment of the Leg
Name: Plantaris Origin: Lateral supracondylar ridge of
femur Insertion: Tuberosity of calcaneus via tendo
calcaneus (Achilles tendon) Action: Plantar flex foot. Flex knee
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Posterior Compartment of the Leg
Name: Flexor digitorum longus Origin: Posteriomedial tibia Insertion: Inferior distal phalanges 2-5 Action: Flex digits 2-5. Plantar flex foot
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Posterior Compartment of the Leg
Name: Flexor hallucis longus Origin: Posterior fibula. Interosseus
membrane Insertion: Inferior distal phalanx 1 Action: Flex digit 1. Plantar flex foot
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Posterior Compartment of the Leg
Name: Tibialis posterior Origin: Interosseus membrane. Posterior
tibia and fibula Insertion: Inferior surfaces of navicular,
cuneiforms, cuboid and bases of metatarsals 2-4
Action: Plantar flex and invert foot. Support arches
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Posterior Compartment of the Leg
Name: Popliteus Origin: Lateral femoral condyle Insertion: Proximoposterior tibia Action: Unlock knee. Flex knee
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