a natomy of the pelvis and hip. b ony a natomy of the h ip hip is formed by the junction of the...
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ANATOMYof the Pelvis and Hip
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BONY ANATOMY OF THE HIP
Hip is formed by the junction of the femur and the pelvic girdle
This articulation, formed by the head of the femur and the acetabulum, is the strongest and most stable joint in the body.
Standing on one foot: 3x-4x BW Jogging: 8X BW ea
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BONY ANATOMY OF THE PELVIS
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BONY ANATOMY OF THE PELVIS
Pelvis is formed by 2 pairs of 3 fused bones: the Ilium, Ischium, and Pubis.
These 2 sets of innominate bones are joined anteriorly by the pubic symphysis
The sacrum fixates the spinal column to the spinal cord, and is responsible for stabilizing the pelvis
The acetablum face down and out depression in the bone that accepts the head of the femur within its fossa
The labrum is a thick ring of fibrocartilage that lines the acetabulum and deepens the acetabulum by approx. 21%. The labrum is thicker/stronger superiorly than inferiorly
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SACRUM: 4 FUSED SPINAL PROCESSES
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LATERAL VIEW
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MUSCULAR ANATOMY
Muscles of the hip have multiple layers; many of the same muscles that acted on the knee, act on the hip
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MU
SC
LES
OF T
HE P
ELV
IS
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Quadriceps Group: Powerful hip flexor (most powerful when knee is flexed)
Sartorius: Flexion, AB-duction, Ext Rot
Iliopsoas Group: Psoas Major, Psoas Minor, Iliacus – primary hip flexors
Adductor Group: Adductor Longus, Adductor Magnus, Adductor Brevis, Pectineus, Gracilis
Abductor Group: Gluteus Medius, Gluteus Minimus (both muscles also medially rotates thigh)
Gluteus Maximus: Extends and laterally rotates thigh
Piriformis: Extends, laterally rotates, and abducts thigh
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Lateral Rotation Group: Superior Gemellus, Inferior Gemellus, Obturator Internus, Obturator Externus, Quadratus Femoris During open chain. During walking and running,
these 6 control the amount of internal (medial) rotation
Femoral Triangle: Formed by Inguinal ligament (superiorly), Sartorius (laterally), and Adductor Longus (medially) contains blood and nerve supply as well as lymph nodes that become swollen with lower limb infection
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ROM
Hip Flexion and Extension: Flexion: 120 to 130 Extension: 10 to 20 0 is considered neutral
Moving leg forward = flexionmoving leg backward = extension
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ROM
Abduction and Adduction Abduction: 45 Adduction: 30
Hip Abduction
Hip Adduction
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ROM
Internal and External Rotation Internal: 45 External: 50
Left:
Internal Rotation
Right:
External Rotation