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 pelvic girdle is the correct anatomical term for the bony ring that connects the vertebral column to the lower limbs.
It is composed of the two hip bones (each made of the ilium, ischium, and pubis) and, along with the sacrum and coccyx, forms the basin-shaped pelvic cavity.
This structure is responsible for transferring weight from the upper body to the lower limbs, a key function for standing and walking.

Option A: The pelvic floor is a muscular diaphragm, not a bony cavity. It forms the base of the pelvic cavity but is not the ring-like bony structure itself.
Option C: A pelvic joint refers to a specific articulation between bones (e.g., the sacroiliac joint). It is a component of the pelvic girdle, not the entire basin-shaped structure.
Option D: Pelvic ligaments are bands of connective tissue that stabilize the pelvic joints. They are not the bony structure described in the question.

Visual 1: Diagram - An annotated diagram of the pelvic girdle, clearly labeling the two hip bones (ilium, ischium, pubis), the sacrum, and the coccyx. Arrows should show how it connects the vertebral column to the femurs.
Visual 2: Comparison Chart - A visual comparison of the male and female pelvis, highlighting the differences in the pelvic inlet, subpubic angle, and overall width, explaining the functional significance for childbirth.

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 anatomy of the pelvic girdle is crucial for nurses in obstetrics (assessing pelvic dimensions for childbirth), orthopedics (managing pelvic fractures), and geriatrics (assessing fall risks).
Pelvic fractures can be life-threatening due to the risk of severe internal bleeding from damaged blood vessels and injury to pelvic organs. Nurses must monitor for signs of shock, such as hypotension and tachycardia.
What if? - If a patient has an unstable pelvic ring fracture, the priority nursing action changes from simple pain management to immediate stabilization (e.g., with a pelvic binder) and preparation for emergency surgery to prevent hemorrhage and further injury.

How to Approach the Question

First, break down the question stem to identify key descriptors: 'basin-shaped cavity,' 'ring,' 'connects vertebrae... to lower limbs.'
This is a factual recall question testing anatomical knowledge.
Evaluate each option against these descriptors.
'Pelvic girdle' is the term for the bony ring that performs this connecting function.
Eliminate 'pelvic floor' as it's muscular, not bony.
Eliminate 'pelvic joint' and 'pelvic ligament' as they are components of the girdle, not the entire structure.

Concept Tested & Keywords

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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.