Anatomy and Cell Biology 3319 Lecture Notes - Lecture 22: Anterior Superior Iliac Spine, Ischial Tuberosity, Iliac Crest

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Lecture 022: Bony Pelvis and Abdominal Muscles
Objectives
â—Ź Describe the anatomy of the bony pelvis
â—Ź Identify the surface landmarks of the pelvis
â—Ź Describe the arrangement and actions of the 4 abdominal muscles
â—Ź Review the actions of the abdominal and back muscles
Skeleton Review
â—Ź Bony pelvis
○ “Basin” - like a bowl
â–  Holds the pelvic organs and nerves
â–  Protects the organs
â—‹ Attaches the lower limbs to the axial skeleton
â–  Distributes the weight of the body
â—‹ Starts off as separate bones and fuse together during embryonic development
â–  Illum
â–  Ischium
â–  Pubis
â–  Sacrum (also a part of the vertebral column)
â—‹ Joints
â–  Acetabulum
â—Ź Ball and socket joint (this is the socket)
â—Ź Fits the head of the femur
â–  Sacroiliac
â—Ź Between the sacrum and the ilium
â—Ź Essentially an immovable joint (especially in males)
â—‹ Little movement in females
â–  Pubic symphysis
â—Ź Fusion point of the 2 pubis
â—Ź Immovable joint, joined together by cartilage
â—‹ The cartilage soften prior to birth
â—‹ Which allows the pubis bones to separate a bit, increasing
the size of the opening of the birth canal during birth
â—‹ Iliac crest
â–  Top of the iliac
â–  Can put your hands on these
â–  Ends at the anterior superior iliac spine
â—Ź A little bony bump
● “Hip-bones”
â—Ź Important landmark
â—Ź Muscles attach to this and goes down to the thigh
â—‹ Ischial tuberosity
â–  Bony bumps at the base of the butlocks
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Document Summary

Describe the anatomy of the bony pelvis. Describe the arrangement and actions of the 4 abdominal muscles. Review the actions of the abdominal and back muscles. Attaches the lower limbs to the axial skeleton. Starts off as separate bones and fuse together during embryonic development. Sacrum (also a part of the vertebral column) Ball and socket joint (this is the socket) Essentially an immovable joint (especially in males) Which allows the pubis bones to separate a bit, increasing. Iliac crest the size of the opening of the birth canal during birth. Ends at the anterior superior iliac spine. Muscles attach to this and goes down to the thigh. Bony bumps at the base of the butlocks. Opening for the nerves and blood vessels. Supply the muscles in the medial components of the thigh. Transition point between the axial skeleton and the lower limbs. Goes from the anterior superior iliac spine to the pubic crest.

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