A basin-shaped cavity that forms a ring between the movable vertebrae of the vertebral column and the lower limbs is called?

Appeared in: AIIMS Raipur NO - 2017 (Shift-1)

Explanation

The question describes a basin-shaped bony ring that connects the vertebral column to the lower limbs.
This anatomical description precisely matches the definition of the pelvic girdle.
The pelvic girdle is composed of the two hip bones (innominate bones), the sacrum, and the coccyx, forming a complete ring.
Its primary functions are to bear the weight of the upper body and transfer it to the lower limbs for locomotion.

Option A: The pelvic floor is a muscular structure, not a bony cavity. It forms the base of the pelvis, supporting the organs within it.
Option C: A pelvic joint refers to a specific articulation between bones (e.g., sacroiliac joint), not the entire basin-shaped structure.
Option D: Pelvic ligaments are bands of connective tissue that stabilize the joints and bones of the pelvis. They are not the bony ring itself.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the Pelvic Girdle as background academic context rather than a clinical decision trigger.
Understanding the structure of the pelvic girdle is critical for nurses in obstetrics, as the dimensions of the female pelvis are crucial for childbirth.
In trauma care, nurses must be aware of the potential for pelvic girdle fractures, which can be life-threatening due to severe internal bleeding and associated organ damage.
What if? If a patient has an unstable pelvic fracture, the priority nursing action changes from simple pain management to immediate stabilization (e.g., with a pelvic binder), monitoring for hemorrhagic shock, and preparing for emergency surgery, as this is a major trauma.

How to Approach the Question

First, analyze the keywords in the question: 'basin-shaped cavity', 'ring', 'connects vertebrae to lower limbs'.
This points to a large, structural component of the skeleton.
Next, recall the basic anatomy of the lower trunk and hips.
Differentiate between the options: 'girdle' implies a bony ring, 'floor' implies muscle, 'joint' implies an articulation, and 'ligament' implies connective tissue.
Based on the keywords, 'pelvic girdle' is the only term that describes the complete bony ring structure connecting the spine and legs.

Concept Tested & Keywords

QBWxNpAAvXhZBZdkk8ey3V

E6 Anatomy Grays 43e Vol 2 Part 2 p. 17-19

E6 Anatomy Applied Ashalatha 4e p. 291-293

Practise the full AIIMS Raipur NO - 2017 (Shift-1)

Attempt every question from this paper in a timed mock, then review the full solution for each one.