Which bone is known as the collar bone?

Appeared in: SGPGI Nursing Officer-2022

Explanation

The clavicle is the correct anatomical term for the bone commonly referred to as the collar bone.
As seen in the provided image and confirmed by anatomical texts, it is a long, slender, S-shaped bone.
It is located horizontally across the upper chest, connecting the sternum (breastbone) with the scapula (shoulder blade).
Its primary functions are to support the shoulder, allowing for a full range of arm movement, and to transmit forces from the upper limb to the central skeleton.

Option A: The sternum is the breastbone, a flat bone situated in the middle of the chest to which the ribs and clavicles attach. It is not the collar bone itself.
Option B: The diaphragm is a large, dome-shaped muscle located at the base of the lungs. It is the primary muscle of respiration and is not a bone.
Option D: The femur is the thigh bone, which is the longest, heaviest, and strongest bone in the human body. It is located in the upper leg, not the shoulder area.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomical terminology of the human skeleton as background academic context rather than a clinical decision trigger.
Accurate anatomical knowledge is fundamental for nurses for precise patient assessment, clear communication with the healthcare team, and correct documentation.
The clavicle is a common site for fractures, especially from falls. Nurses must be able to identify signs of a clavicle fracture (e.g., pain, swelling, deformity, inability to lift the arm) and provide initial care, such as immobilizing the arm in a sling.
What if? If a patient presents with pain and a visible deformity over the collar bone after a fall, the nurse should suspect a clavicle fracture, assess the neurovascular status of the affected arm (checking pulse, sensation, and movement), immobilize the arm, and anticipate an order for an X-ray.

How to Approach the Question

First, identify the key term in the question: 'collar bone'. This is a common name for a specific anatomical structure.
Next, examine the provided image, which shows the location and shape of the bone in question, confirming it is the bone connecting the shoulder to the central chest.
Evaluate each option to match the common name with its correct anatomical term.
Eliminate 'Diaphragm' as it is a muscle, not a bone.
Eliminate 'Sternum' (breastbone) and 'Femur' (thigh bone) as they are different bones in different locations.
Conclude that 'Clavicle' is the correct anatomical name for the collar bone.

Concept Tested & Keywords

QWGEh2jStdY6HwDQ-kG7Tp

E6 Osteology InderbirSingh 5e p. 31-33

E6 Anatomy BDChaurasia V1 10e p. 22-24

E6 Anatomy Grays 43e Vol 2 Part 2 p. 79-81

Practise the full SGPGI Nursing Officer-2022

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