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Lecture 7

MOVESCI 230 Lecture 7: Pelvis and HipPremium

3 pages49 viewsWinter 2019

Movement Science
Course Code
Melissa Gross

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Lecture 7
Lower extremity includes pelvic girdle and thigh, leg, foot bones
Pelvic girdle – bones of axial and appendicular skeleton
o Coxal (appendicular) – “innominate”
o Sacrum (axial)
Coxal (Innominate)
o Ilium – superior
o Ischium – posterior
o Pubis – anterior
o Landmarks:
§ Acetabulum (hip socket)
§ Obturator foramen
o Ilium landmarks: (lateral unless named)
§ Anterior/posterior superior iliac spine
§ Anterior/posterior inferior iliac spine
§ Greater sciatic notch
§ Iliac crest
§ Gluteal lines
§ Auricular surface (medial)
§ Ala
§ Iliac fossa (medial)
o Ischium landmarks
§ Ischial spine
§ Lesser sciatic notch
§ Ischial tuberosity
§ Ischial ramus
o Pubis landmarks:
§ Superior pubic ramus
§ Inferior pubic ramus
§ Body of pubis
Coxal bone matures during college years
o Acetabulum – 12-16 years
o Ischial tuberosity – 15-26 years
Pelvic girdle:
o Pelvic brim
o Pubic arch
Pelvic girdle joints bound by synovial and fibrocartilaginous joints
o Sacroiliac – non-axial synovial (limited motion)
o Pubic symphysis – fibrocartilage (limited mobility)
Pubic symphysis can separate in childbirth
o Non-pregnant - <5mm
o Pregnant – 1-12mm (relaxin)
o Rupture incidence – 1/30,000 deliveried
Synovial joint between sacrum/ilium – ligament reinforcement
o Anterior sacroiliac ligament
o Posterior sacroiliac ligament
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