Pelvis/LE - Hip and Pelvic Girdle Joints Flashcards
Hip Joint
synovial joint
ball and socket
acetabulum of the pelvic girdle to the head of the femur
Angle of Inclination
angle of the neck to the shaft of the femur
115 - 140 degrees normal
Angle of Torsion
angle of head and neck of femur to distal condyles of femur
7 - 12 degrees normal
Joints of the Bony Pelvis (4)
lumbosacral
sacroiliac
sacrococcygeal
pubic symphysis
Lumbosacral Joint
between L5 and S1
articulate anteriorly at the anterior intervertebral joint formed by the L5/S1 disc and posteriorly between two zygapophysial (facet) joints between the articular processes
pelvic girdle
Lumbarization
S1 not fully fused to S2
looks like 6th lumbar vertebrae
causes hypermobility
Sacralization
L5 fused to S1
causes hypomobility
Sacroiliac Joint
joints between the sacrum and the ilium
anterior portion synovial
posterior portion syndesmosis
links skeleton to trunk
Zygapophysial Joints
Facet joints different angles throughout spine C-Spine: hands on shoulder T-Spine: hands on back L-Spine: hands on hips
Ligaments of SI Joint (5pair)
anterior sacroiliac ligaments interosseous sacroiliac ligaments posterior sacroiliac ligaments sacrotuberous ligaments sacrospinous ligaments
Interosseous SI Ligaments
primary structures of force transfer from axial skeleton to the two ilia and then femurs during standing and ischial tuberosities during sitting
Pubic Symphysis
secondary cartilaginous joint
located at union of the bodies of the pubic bones
Sacrococcygeal Joint
secondary cartilaginous joint between sacrum and coccyx
sacrococcygeal ligaments
no known function, but can cause pain if rotated (post rot easier to fix)
Function of Sacrotuberous and Sacrospinous Ligaments
allow only limited upward movement of the inferior end of the sacrum
Ligamentum Teres
comes out of head of femur and attaches to acetabulum
blood supply in children then turns to ligament later
