Pelvic girdle and pelvis
- Pelvic girdle = Hip bone
- Pelvis =
- Hip bone +
- Sacrum +
- Coccyx
- (+ Lumber vertebra V)
The characteristics of the human lower limb can be better understood by keeping in mind the evolution of human locomotion from quadrupedal walking to bipedal walking. Human upright bipedal walking freed the upper limbs, and the freed upper limbs fed back the development of the brain, thus promoting the development of "culture.
In particular, the female pelvis serves as a pelvic girdle connecting the trunk and free lower limbs, and as a receptacle for the fetus. It would be good to proceed with the practical training from this point of view.
- 1. Hip bone
- Hip bone =
- Ilium + Ischium + Pubis
- ・At birth, these bones were joined by a Y-shaped cartilage in the acetabulum (observe in the commissural skeleton of an infant).。
- ・Acetabulum (1)---- Hip joint (2)
- It consists of the following three parts:
- Body of ilium (3)
- Body of iscium (4)
- Superior pubic ramus (5)
- ・Obturator foramen (6);Which bone part is composed of?
- Why is it called a closure hole (obturator foramen)?
- What passes?
- 1-1. Ilium
- ・Ala of ilium (7)
;The spread is?(Proof of upright bipedalism!)
- ・Arcuate line of ilium (8)---- (9)
- ・Auricular surface (10)---- Sacro-iliac joint (11);Moving or...?
- ・Iliac crest (12)
;Touch the entire length with a living body.
- Anterior superior iliac spine (13);Touch it with a living body. See what attaches.?
- Posterior superior iliac spine (14);Touch it with a living body. (dimples on the waist of a Kewpie doll, dimples on Venus)
- ・Anterior inferior iliac spine (15);What attaches?
- Can you touch it?
- ・Psterior inferior iliac spine (16);Can you touch it??
- ・Anterior gluteal line (17)
- Posterior gluteal line
- Inferior gluteal line;What attaches?
- ・Greater sciatic notch (18)
- 1-2. Ischium
- ・Ischial tuberocity (19)---- Sacrotuberous ligament
- Let's touch it in living body.
- ・Greater sciatic notch (18) ---- Greater sciatic foramen
- What passes?
- ・Isciatic spine (21)---- Sacrospinous ligament
- ・Lsser sciatic notch (22)---- Lesser sciatic foramen
- 1-3. Pubis
- ・Pubic symphysis (23);Touch it with a living body.
- 2. Pelvis
- ・Greater (false) and lesser (true) pelvis;What separates them.?
- ・Pelvic inlet (24)
- ・Pubic arch (25) ---- Subpubic angle (26)
- ・Pelvic cavity = lesser pelvic cavity (27)
- ・Pelvimetry (Important in obstetrics!)
- There is some confusion in the terminology of pelvimetry. Here we consider the following:
- True conjugate:Promontory ---- Superior border of pubic symphysis (also called anatomical conjugate, unlike obstetric conjugate)
- Obstetric conjugate :Promontry ---- Shortest point to the posterior surface of the pubic symphysis (also known as the obstetric true conjugate)
- Diagonal conjugate
- External conjugate (Baudelocque's diameter)
- ・Sex differences in the pelvis
- What do textbooks and other sources say about sex differences in the following points?
- What is the shape of the pelvic cavity, pelvic inlet, obturator foramen, greater sciatic notch, subpubic angle, and sacrum?
- ・Jacoby line (28);What it looks like?
- What is・Roser-Nelaton line?
- ・How is the pelvic tilt in the standing and sitting postures?