Anatomy - The lower extremity

9 important questions on Anatomy - The lower extremity

Which joints connect the two hip bones (Ossa coxae and Os sacrum)

Sacro-iliac joint (Articulatio sacroiliaca)
Pubic symphysis (Symphisis pubica)

What is the path of the Linea terminalis?

It begins at the pubic symphysis with the Pecten ossis pubis and continues through the LInea arcuata to the promontory (Promontorium).

The Linea terminalis encircles the pelvic inlet (Apertura pelvis superior) and separates the cranial false (large) pelvis (Pelvis major) from the caudal true (small) pelvis (Pelvis minor0

What is the pelvic outlet confined by?

The pelvic outlet (Aperura pelvis inferior is confined by the inferior margin of the pubic symphysis anteriorly, the ischial tuberosities laterally, and the tip of the coccyx posteriorly.
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What are the differences between the male and the female pelvis?

In women, the pelvic inlet is transverse oval in shape.
In addition, the inferior pubic angle (Arcus pubis), the distance between the ischial tuberosities, and the wings of ilium are larger than in men.

What are the three parts that the hipbone consist of?

ilium (Os ilium)
ischium (Os ischium)
pubis (Os pubis)

What is the function of the Facies auricularis?

The Facies auricularis serves as articular surface for the sacro-iliac joint

What does the Discus interpubicus attach to?

The Discus interpubics is attached to the Facies symphysialis

How does the great saphenous vein travel?

  • On the anterior thigh, it travels through the Fossa Ovalis, after which it merges with the Femoral Vein.
  • As you go down the leg, it wraps medially around to the posterior aspect of the knee.
  • Then it comes back anteriorly to the medial malleolus of the ankle, where it anastomoses with the Lesser Saphenous Vein.

Where does the popliteal vein run?

Around the back of the knee, this vein is very important clinically.
  • BLOOD CLOT in POPLITEAL VEIN ------> Femoral Vein ------> External Iliac ------> IVC ------> Right Heart ------> Lungs ------> Pulmonary Embolism! -- not good.
  • The Lesser Saphenous Vein feeds into the Popliteal Vein around the posterior aspect of the thigh.
  • The Popliteal Vein feeds into the Femoral Vein.

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