The jugular chain is the anterior limitation of the neck triangle, the supraclavicular chain is the posterior limitation of the triangle, and the accessory chain is the inferior limitation of the triangle.

• A. True
• B. False
• C. Cannot determine
• D. Not applicable

Answer: (B)

The boundaries of the neck triangles are fixed anatomical landmarks, not the lymph node groups themselves. The anterior triangle is bordered by the mandible, the anterior border of the sternocleidomastoid, and the midline of the neck; the posterior triangle is bordered by the posterior border of the sternocleidomastoid, the anterior border of the trapezius, and the clavicle. The jugular (deep cervical) chain runs along the internal jugular vein within the carotid sheath, inside the neck rather than forming an external boundary. The supraclavicular chain sits in the supraclavicular fossa near the clavicle, in the lower neck region, and is not the boundary of the posterior triangle. The accessory chain travels with the spinal accessory nerve in the posterior triangle, again not defining its inferior boundary. Since the lymph node chains do not establish the triangle boundaries themselves, the statement is false.