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Title: Anatomy of the Posterior of the Hip
Description: Anatomy of the Posterior of the Hip Lecture for physical therapy, medicine student and professors
Description: Anatomy of the Posterior of the Hip Lecture for physical therapy, medicine student and professors
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Lecture 5
Extensors and lateral rotators of the hip
Overlapping
gluteal muscles
- They are 3 large muscles:
gluteus maximus, gluteus
medius, and gluteus
minimus
...
- All are supplied by branches from sacral plexus,
EXCEPT obturator externus, which is supplied by
posterior division of obturator nerve(lumbar plexus)
...
Sacrotuberous ligament
...
Gluteus maximus:
Action:
•
•
•
Extension of thigh on the
trunk at the hip joint
(main extensor)
(important for running)
...
Upper fibers abduct,
while lower fibers adduct
the thigh at the hip joint
...
Insertion:
• A flat ridge on the lateral
surface of greater
trochanter of femur
...
Insertion:
• The front of the greater
trochanter of femur
...
Their anterior fibers flex
and rotate the femur
medially (these fibers
cross anterior to the hip
joint)
...
Actions of both gluteus
medius and minimus:
•
On standing on one limb,
they contract supporting
the pelvis preventing its
tilt to the unsupported
side (important during
walking)
...
And on walking, the patient
will exhibit a lurching gait
...
Piriformis:
Origin:
•
Anterior surface of middle
3 sacral pieces
...
Obturator internus:
Origin:
•
Pelvic surface of obturator
membrane and the
surrounding of obturator
foramen
...
The 2 gemelli:
Origin:
•
Superior and inferior
margins of the lesser
sciatic notch
...
Quadratus femoris:
Origin:
•
Lateral margin of ischial
tuberosity
...
Obturator externus:
Origin:
•
External surface of
obturator membrane and
the surrounding of
obturator foramen
...
Actions of the 6 small
muscles:
•
•
•
They rotate the thigh at
the hip joint laterally
(they are called the
lateral rotators of the hip
joint) (they cross behind
the hip joint)
...
They help also in
horizontal extension of
the thigh at the hip joint
...
Applied anatomy:
Title: Anatomy of the Posterior of the Hip
Description: Anatomy of the Posterior of the Hip Lecture for physical therapy, medicine student and professors
Description: Anatomy of the Posterior of the Hip Lecture for physical therapy, medicine student and professors