The parathyroid glands are partially embedded in which surface of the lateral lobes of the thyroid?

RRB Nsg. Superintendent - 29 April 2025 (Shift-3rd)

Applied Anatomy

Easy

Appeared in: RRB Nsg. Superintendent - 29 April 2025 (Shift-3rd)

Explanation

The parathyroid glands are typically four small glands located in the neck.
Anatomically, they are situated on the posterior (back) surface of the lateral lobes of the thyroid gland.
This location is confirmed by the provided anatomical illustration, which shows a posterior view.
The glands are often found within the capsule of the thyroid gland itself.

Option B: While there is a superior pair of parathyroid glands, 'Upper' refers to their general position near the superior pole of the thyroid, not the surface they are embedded in.
Option C: Similarly to 'Upper', while there is an inferior pair of parathyroid glands, 'Lower' refers to their position near the inferior pole of the thyroid, not the surface of embedding.
Option D: The anterior surface is the front of the thyroid gland. The parathyroid glands are located on the back.

Visual 1: Diagram - A clear diagram showing both an anterior and a posterior view of the thyroid gland. The posterior view should have the four parathyroid glands clearly labeled to emphasize their position.
Visual 2: Illustration - An illustration depicting the key signs of hypocalcemia, such as Chvostek's sign and Trousseau's sign, to help students visualize these clinical assessments.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the Endocrine System as background academic context rather than a clinical decision trigger.
The primary clinical relevance is the risk of iatrogenic (accidental) injury during neck surgery, especially thyroidectomy.
Nurses must meticulously monitor post-thyroidectomy patients for signs of hypocalcemia (tingling, muscle spasms, positive Chvostek's/Trousseau's signs), which indicates parathyroid damage.
Prompt reporting of hypocalcemia signs is critical for patient safety, as severe cases can lead to laryngospasm and seizures.

How to Approach the Question

First, identify the key anatomical structures in the question: 'parathyroid glands' and 'thyroid'.
The question asks for the specific 'surface' of attachment. This requires recalling the 3D relationship between these two glands.
Analyze the provided image. It is labeled as a posterior view and clearly shows the parathyroid glands on the back of the thyroid. This visual evidence directly supports one of the options.
Evaluate the options based on anatomical terminology. 'Anterior' means front, and 'Posterior' means back. 'Upper' and 'Lower' describe relative positions but not the surface itself.
Synthesize the textual knowledge with the visual information to select the most precise and accurate answer.

Concept Tested & Keywords

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