BIOL 212 Lecture Notes - Lecture 14: Posterior Sacroiliac Ligament, Pelvic Brim, Pelvic Inlet
Document Summary
Bones of the appendicular skeleton: lower limbs- held by pelvic girdle. Coxal bone (coxa)= 3 bones: (ilium + ischium + pubis) Fusion by 25 years (triradiate cartilage fuses at this age) Great bone fusion for weight-bearing and muscle attachment. Fashion at hip socket= acetabulum ( vinegar cup ) & lower rim of obterator foramen ( closed hole ) Pelvic girdle: pelvic girdle= 2 coxal bones, has stability, lacks exibility, attaches at sacroiliac (si) joint, si joint composed of two joints: synovial portion, syndesmosis portion to it. Bony pelvis= 2 coxal bones + sacrum: si joint is an unusual interlocking synovial gliding joint with strong extracapsular ligaments. Anterior and posterior sacroiliac ligaments: posterior ligaments are really strong and provide the most stability. From sacral promontory, around arcuate line to pubic crest (anterior-posterior0: 3. Greater pelvis: 1. superior to pelvic brim, 2. Bony pelvis: encases internal reproductive organs. Male pelvis: overall- narrow and tall. Monday, october 16, 2017: overall-short and wide.
