General Pelvis Flashcards
What is the function of the pelvis
Transmit weight from vertebral column to lower limbs
Contribute to reciprocal gait pattern
Provide attachment for muscles
Provide bony protection to birth canal
What is different about the female pelvis
It is shaped for childbirth So there is a wider angle of the public arch in women
What is the bone structure in the pelvis
Spongy
Less dense
More stability or mobility?
More stability than mobility due to lack of mobility of sacro-iliac joints and symphysis pubis
What are the components of a hemi pelvis
Ilium 2/5
Ischium 2/5
Pubis 1/5
Describe the sacrum?
Triangular
Comprises of fused vertebrae
Auriculàr surface articulates with ilium
Posteriorly, sacrum is roughened for attachments of sacro-iliac ligaments
Describe the coccyx?
4 fused vertebrae
Anterior surface is concave
Posterior surface has tubercles
Coccygeal cornua articulates with sacral cornua
What is the sacro-iliac joint?
Fibrous capsule completely surrounding the joint
Describe the movement possible at the pelvis
In early childhood, movement is possible in all directions
In adulthood, slight gliding and rotation is possible (nutation)
What is nutation?
Anterior rotation at base of pelvis and posterior rotation at apex
What is the opposite of nutation?
Counternutation
What is diastasis and give an example
Separation of pubic bones without fracture
Giving birth- 9mm separation
What is the pubic symphysis
A secondary cartilaginous joint located between the left and right pubic bones
Allows no movement
