A NATOMY of the Pelvis and Hip. B ONY A NATOMY OF THE H IP Hip is formed by the junction of the femur and the pelvic girdle This articulation, formed.

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Presentation transcript:

A NATOMY of the Pelvis and Hip

B ONY A NATOMY OF THE H IP 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

B ONY A NATOMY OF THE P ELVIS

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

S ACRUM : 4 FUSED SPINAL PROCESSES

L ATERAL V IEW

M USCULAR A NATOMY Muscles of the hip have multiple layers; many of the same muscles that acted on the knee, act on the hip

M USCLES OF THE P ELVIS

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

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

ROM Hip Flexion and Extension: Flexion: 120 to 130 Extension: 10 to 20 0 is considered neutral Moving leg forward = flexion moving leg backward = extension

ROM Abduction and Adduction Abduction: 45 Adduction: 30 Hip Abduction Hip Adduction

ROM Internal and External Rotation Internal: 45 External: 50 Left: Internal Rotation Right: External Rotation