PELVIS I: BONES AND MUSCLES
Introduction--why is pelvis so hard?
Bony structures of the pelvis
Muscles of the pelvis--attaching the
legs for upright living
The floor of the pelvis
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Bones and Muscles - Basic Human Anatomy - Lecture Slides, Slides of Anatomy
Human Anatomy course teaches a student the structural nature and significance of each of the major organ systems, and how each system carries out its unique role in the living organism. Key points in this lecture are: Bones and Muscles, Pelvis Hard, Abdominal Cavity, Bony Structure of the Pelvis, Sacrotuberous Ligament, Sacrospinous Ligament, Lesser Sciatic, Obturator Foramen, Pelvic Inlet, Pelvic Outlet, Muscle Tables
Typology: Slides
2012/2013
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PELVIS I: BONES AND MUSCLES
Introduction--why is pelvis so hard?
Bony structures of the pelvis
Muscles of the pelvis--attaching the
legs for upright living
The floor of the pelvis
docsity.com
Why is the pelvis hard--#1 upright
Pelvic tilt or how we got to be upright
- Compare with quadruped (cat for instance)
Bowl concept
- pelvis spills forward
- Hernia
- “beer belly”
- In human minor pelvis is behind (posterior)
to guts and abdominal cavity
docsity.com
Why is the pelvis hard #2 (fig leafs)
“Private parts” don’t uncover except in most intimate setting (or medical setting!)
Not comfortable seeing or talking about (except jokes)
Now serious-many medical issues
Realize and confront, not dehumanize-- develop professional manner and language-- starts with anatomy
docsity.com
Bony structure of the pelvis
MAIN STRUCTURES
Hip bone (innominate,
os coxae)--fusion of
- Ilium (“hips”)
- Ischium (“rear”)
- Pubis (anterior midline)
Sacrum and coccyx
Acetabulum
Femur--head, neck,
greater trochanter
HOLES
False and true pelvis (major, minor pelvis) Pelvic inlet, pelvic outlet Sacrotuberous ligament Sacrospinous ligament Greater, lesser sciatic foramen Obturator foramen
docsity.com
Frolich, Human Anatomy, Pelvis I docsity.com
Frolich, Human Anatomy, Pelvis I docsity.com
Muscle tables--example
NAME ORIGIN INSERTION ACTION INNERV.
Iliopsoas
Gluteus
maximus
Gluteus
minimus
Lateral
rotators
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Female Male
Cavity is broad, shallow
Pelvic inlet oval + outlet round
Bones are lighter, thinner
Pubic angle larger
Coccyx more flexible, straighter
Ischial tuberosities shorter, more everted
Cavity is narrow, deep Smaller inlet + outlet Bones heavier, thicker Pubic angle more acute Coccyx less flexible, more curved Ischial tuberosities longer, face more medially docsity.com
M&M, Fig. 26.
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Blood supply to the pelvis and lower limb
Aorta ends by splitting into right,left common iliac aa. Each common iliac splits into internal and external iliac aa. External iliac passes under inguinal ligament to lower limb Internal iliac a. enters pelvis and supplies muscles, viscera Umbilical a. comes off of internal iliac in fetus
M&M, Fig. 19. docsity.com