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.

ANATOMYof the Pelvis and Hip

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

BONY ANATOMY OF THE PELVIS

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

SACRUM: 4 FUSED SPINAL PROCESSES

LATERAL VIEW

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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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 = flexionmoving 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