Common carotid artery is palpable at:
**Core Concept**
The common carotid artery is a major artery that supplies blood to the head and neck. It originates from the aortic arch and bifurcates into the internal and external carotid arteries at the carotid bifurcation, typically located at the level of the upper border of the thyroid cartilage.
**Why the Correct Answer is Right**
The common carotid artery is palpable in the neck, anterior to the sternocleidomastoid muscle, at the level of the upper border of the thyroid cartilage. This is because the common carotid artery is a relatively large vessel with a diameter of about 1 cm, which is easily compressible and can be felt with moderate pressure. The carotid pulse is a vital sign that indicates the heart rate and blood pressure.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the common carotid artery is not palpable in the suprasternal notch. The suprasternal notch is a depression in the anterior chest wall, and the common carotid artery is located more superiorly in the neck.
**Option B:** This option is incorrect because the common carotid artery is not palpable in the axilla. The axilla is a region in the anterior chest wall, and the common carotid artery is located in the neck.
**Option C:** This option is incorrect because the common carotid artery is not palpable in the cubital fossa. The cubital fossa is a triangular region on the anterior aspect of the elbow, and the common carotid artery is located in the neck.
**Clinical Pearl / High-Yield Fact**
The carotid pulse is a vital sign that can be used to assess the heart rate and blood pressure. It is an important sign to check in patients with suspected cardiovascular disease or shock.
**Correct Answer: C. The neck, anterior to the sternocleidomastoid muscle, at the level of the upper border of the thyroid cartilage.**