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