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The PelvisThe Pelvis
Raymond G Buick FRCS
The Pelvis
Two functions
1. connects the vertebral column to the femurs.
• bear the weight of the upper body and transfers that weight
from the axial skeleton to the appendicular skeleton
• provide attachments for muscles of locomotion and posture.
2. contain and protect pelvic and some abdominal viscera
• urinary tracts
• internal reproductive organs
• provide attachment for external reproductive organs and
associated muscles and membranes
The Pelvis
Bones
• sacrum
• 2 hip bones
(innominate bone)
Joints
• sacro-iliac
• pubic symphysis
The Pelvis
Bones
• sacrum
• 2 hip bones
(innominate bone)
made up of 3 bones
iliumilium
ischiumischium
pubispubis
The Pelvic Girdle
iliumilium
sacrumsacrum
ischiumischium
pubispubis
AuthorOriginal uploader was Wiechers at nl.wikipedia
anterior superioranterior superior
iliac spineiliac spine
iliac crestiliac crest
anterior inferioranterior inferior
iliac spineiliac spine
iliopubiciliopubic
eminenceeminence
pubic tuberclepubic tubercle
iliac fossailiac fossa
iliac fossailiac fossa
sacro-iliac jointsacro-iliac joint
iliac fossailiac fossa
sacro-iliac jointsacro-iliac joint
symphysis pubissymphysis pubis
iliac fossailiac fossa
sacro-iliac jointsacro-iliac joint
symphysis pubissymphysis pubis
inferior pubic ramusinferior pubic ramus
superior pubic ramussuperior pubic ramus
ischiumischium
anterior superioranterior superior
iliac spineiliac spine
anterior inferioranterior inferior
iliac spineiliac spine
posterior inferiorposterior inferior
iliac crestiliac crest
ischialischial
tuberositytuberosity
ischial spineischial spine
greater sciaticgreater sciatic
notchnotch
lesser notchlesser notch
greater sciaticgreater sciatic
notchnotch
obturatorobturator
foramenforamen
lesser notchlesser notch
anterior superioranterior superior
iliac spineiliac spine
ischialischial
tuberositytuberosity
anterior inferioranterior inferior
iliac spineiliac spine
iliac crestiliac crest
ischial spineischial spine
posterior inferiorposterior inferior
iliac crestiliac crest
symphysis pubissymphysis pubis
Acetabulum
ischialischial
tuberositytuberosity
anterior superioranterior superior
iliac spineiliac spine
superior pubicsuperior pubic
ramusramusanterior inferioranterior inferior
iliac spineiliac spine
Acetabulum
iliumilium
ischiumischium
pubispubis
The Pelvic Girdle
JOINTS
• sacro-iliac
• pubic symphysis
The Pelvic Girdle
JOINTS
• sacro-iliac
• pubic symphysis
The Pelvic Girdle
• sacro-iliac
• pubic symphysis
The Pelvic Girdle
• sacro-iliac
– compound joint
• synovial joint
• fibrous joint
• pubic symphysis
The Pelvic Girdle
• sacro-iliac
– compound joint
• synovial joint
• fibrous joint
The Pelvic Girdle
• sacro-iliac
– compound joint
• synovial joint
• fibrous joint
The Pelvic Girdle
• sacro-iliac
– compound joint
Anterior
• synovial joint
The Pelvic Girdle
• sacro-iliac
– compound joint
Anterior
• synovial joint
Posterior
• fibrous joint
The Pelvic Girdle
• sacro-iliac
• pubic symphysis
– secondary cartilaginous joint
The Pelvic Girdle
• sacro-iliac
• pubic symphysis
– secondary cartilaginous joint
– fibrous cartilage
• interpubic disc
hyalinehyaline
fibrocartilagefibrocartilage
Al pleaseAl please
redrawredraw
Joints
•Fibrous
•Cartilaginous
•Synovial
Joints
•Fibrous
•Cartilaginous
•Synovial
sutures
syndesmoses
gomphosis
Joints
•Fibrous
•Cartilaginous
•Synovial
Primary cartilaginous joints
– synchondroses
Secondary cartilaginous
joints – symphyses
The Pelvis
Two functions
1. connects the vertebral column to the femurs.
2. contain and protect pelvic and some abdominal viscera
The Pelvis
Two functions
1. connects the vertebral column to the femurs.
• bear the weight of the upper body and transfers that weight
from the axial skeleton to the appendicular skeleton
• provide attachments for muscles of locomotion and posture.
2. contain and protect pelvic and some abdominal viscera
sacroiliac jointsacroiliac joint
hip jointhip joint
sacro-iliac joint
sacroiliac jointsacroiliac joint
sacro-iliac joint
sacro-iliac joint
joint surfaces
sacro-iliac ligaments
sacro-iliac joint
joint surfaces
– irregular contour
– limited mobility
sacro-iliac joint
joint surfaces
– irregular contour
– limited mobility
sacro-iliac ligaments
– posterior sacro-iliac ligaments
– interosseous sacro-iliac ligaments
sacro-iliac joint
joint surfaces
– irregular contour
– limited mobility
sacro-iliac ligaments
– posterior sacro-iliac ligaments
–interosseous sacro-iliac ligaments
sacro-iliac joint
interosseous sacro-iliac ligaments
sacro-iliac joint
sacro-iliac joint
sacro-iliac joint
joint surfaces
– irregular contour
– limited mobility
sacro-iliac ligaments
– posterior sacro-iliac ligaments
– interosseous sacro-iliac ligaments
– anterior sacro-iliac ligaments
The sacroiliac joints
joint surfaces
sacro-iliac ligaments
very taut joint capsules
iliolumbar ligament
accessory ligaments sacrospinosis
sacrotuberous
The sacroiliac joints
very taut joint capsules
joint surfaces
sacro-iliac ligaments
iliolumbar ligament
accessory ligaments sacrospinosis
sacrotuberous
iliolumbar ligament
The sacroiliac joints
very taut joint capsules
sacro-iliac ligaments
iliolumbar ligament
accessory ligaments sacrospinosis
sacrotuberous
sacrotuberous ligament
The sacroiliac joints
very taut joint capsules
sacro-iliac ligaments
iliolumbar ligament
accessory ligaments sacrospinosis
sacretubeorus
sacrospinosis ligament
The sacroiliac joints
sacrospinosis ligament
ischialischial
tuberositytuberosity
ischial spineischial spine
sacrotuberous ligament
The Pelvis
FALSE PELVIS
TRUE PELVIS
The Pelvic Girdle
FALSE PELVIS
TRUE PELVIS
pelvic inlet
superior pelvic aperture
The Pelvic Girdle
female – v – male
The Pelvic Girdle
female – v – male
• wide pubic arch
> 800
< 700
The Pelvic Girdle
female – v – male
• wide pubic arch
• pelvis - wider and shallower
> 800
< 700
The Pelvic Girdle
female – v – male
• wide pubic arch
• pelvis - wider and shallower
• pelvic inlet F=oval: M =heart-shaped
The Female Pelvic Girdle
ischial spineischial spine
interspinous distanceinterspinous distance
The EndThe End
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The Pelvis - Bones and Joints