How many vertebrae are in the thoracic region?

Appeared in: WCL Staff Nurse - 2022

Explanation

The human vertebral column contains 12 thoracic vertebrae, which are numbered T1 to T12.
The thoracic vertebrae are unique because they are the only ones that articulate with the ribs, forming the posterior anchor of the rib cage.
This section of the spine is located between the cervical (neck) and lumbar (lower back) regions.

Option A: This is the number of vertebrae in the lumbar region of the spine.
Option C: This is the number of vertebrae in the cervical region of the spine.
Option D: This number does not correspond to the standard count of vertebrae in any of the five regions of the human spine.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the vertebral column as background academic context rather than a clinical decision trigger.
Knowledge of vertebral levels is crucial for locating anatomical landmarks and for procedures like spinal anesthesia or epidural placement.
Assessing the level of a spinal cord injury often involves testing dermatomes, which are areas of skin supplied by a single spinal nerve. For example, the T4 dermatome is at the level of the nipples, and the T10 dermatome is at the level of the umbilicus.
What if? If a patient has a spinal cord injury at the T6 level, the nurse would expect loss of sensation and motor function below the chest, but normal function in the arms and hands, as these are supplied by cervical nerves.

How to Approach the Question

This is a factual recall question from the subject of anatomy.
Identify the key term in the question: 'thoracic region'.
Recall the structure of the vertebral column and the number of vertebrae in each of its five sections (Cervical, Thoracic, Lumbar, Sacral, Coccyx).
A helpful mnemonic to remember the number of vertebrae in the first three sections is to think of meal times: 7 (cervical) for breakfast, 12 (thoracic) for lunch, and 5 (lumbar) for dinner.
Compare the recalled number for the thoracic region with the given options to select the correct answer.

Concept Tested & Keywords

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E6 Anatomy Grays 43e Vol 2 Part 2 p. 15-17

Practise the full WCL Staff Nurse - 2022

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