MUSCLES: 6TH LECTURE Muscles of the lower extremity

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MUSCLES 6TH LECTUREMuscles of the lower
extremity

• 1. ILIACUS
• 2. PSOAS
• 3. TENSOR FASCIA LATA
• 4. SARTORIUS
• 5. GRACILIS
• 6. PECTINEUS
• 7. ADDUCTOR BREVIS
• 8. ADDUCTOR LONGUS
• 9. ADDUCTOR MAGNUS

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ILIACUS
Origin Iliac fossa

Action Hip flexion
Insertion Lesser trochanter adjacent femur
Hip outward rotation
Hip adduction
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PSOAS

Origin TP of lumbar vertebra bodies And 12th TV
Insertion Lesser trochanter of femur adjacent
femur. Same as Iliacus
Action Hip flexion
Hip outward rotation
Hip adduction
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ILIOPSOAS
Because they always work together the Iliacus
and the Psoas are often referred to as the
Iliopsoas muscles


Psoas


iliacus
SAME ACTIONS Hip flexion Hip Adduction Hip
outward rotation
The tendons of both muscles go together to
the insertion

Same insertion
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TENSOR FASCIA LATAE
Origin Anterior, lateral ilium below the
anterior Crest posterior to the ant, sup spine
Insertion Ilio-tibial band
Action Hip flexion
Hip inward rotation
Hip abduction
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Greater trochanter
GT
LT
Pectineal Line
Lesser trochanter
Gluteal Line
Gluteal line
Pectineal line
Linea Aspera
Lateral Epicondylar Ridge
Linea Aspera
Medial Epicondylar ridge
Medial epicondylar ridge
Med E
Lat E
Lateral epicondylar ridge
Adductor tubercle
Medial epicondyle
Lateral epicondyle
Medial posterior condyle
Lateral posterior condyle
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PECTINEUS
Origin Superior Ramus pubic bone (crest)

Actions Hip flexion
Insertion Pectineal line, posterior femur
Hip Adduction
Hip outward rotation
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PECTINEUS
Origin

Insertion
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Origin Inferior Ramus of Pubic bone
ADDUCTOR BREVIS

Insertion Pectineal line upper 1/3 Linea
Aspera
Action Hip Flexion
Hip adduction
Hip Outward rotation
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ADDUCTOR BREVIS
Origin
Insertion

Pectineal line upper 1/3 of Linea Aspera
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ADDUCTOR LONGUS

Origin Body of Pubic bone
Actions Same as adductor brevis Hip flexion
Insertion Middle 1/3 of Linea Aspera
Hip Adduction
Hip outward rotation
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ADDUCTOR LONGUS
Origin
1/3
1/3
Insertion
1/3
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Origin Inferior Ramus of Pubis Ischium
ADDUCTOR MANGUS

Insertion all of Linea Aspera medial
epicondylar ridge adductor tubercle
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ADDUCTOR MANGUS
Origin
Insertion
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All the actions below are on the hip/leg
ADDUCTOR MANGUS
Anterior fibers
Posterior fibers
Flexion

Extension
Outward rotation
Inward rotation
Anterior fibers
Posterior fibers
All fibers Adduction
Midline of leg
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Adductor muscles of the leg/hip
Pectineus (cut off)
Adductor magnus
Adductor Brevis
Adductor Longus
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GRACILIS

Origin Symphysis of Pubis inferior ramus of
Pubic bone
Actions Hip flexion
Insertion Upper, anterior, medial Tibia
Hip adduction
Hip outward rotation
Knee flexion
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SARTORIUS

Origin Anterior, Superior Iliac spine
Insertion Upper, anterior, medial Tibia. (Same
as gracilis)
Tailors muscles
Hip flexion Knee flexion Hip abduction Hip
outward rotation
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Sartorius.
Anterior crest ilium

Pectineus
Iliopsoas
Adductor Longus
Tensor Fascia Lata
Gracilis
sartorius
Sartorius is a superficial muscle, which is above
the other thigh muscles and runs obliquely across
the thigh


origin

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Tensor Fascia Lata
Iliacus
Pectineus
Sartorius
Adductor Longus
Adductor Magnus
Gracilis.
Adductor Brevis
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Adductor Brevis
Iliacus Psoas.
Pectineus
Adductor Longus
Adductor magnus