Which of the following statements is false?

• A. Rhomboid, Serratus and Levator Scapula all help you sit up straight.
• B. The voicebox is controlled only by neck muscles.
• C. The back contains axial and appendicular muscles.
• D. Rhomboid muscles originate on both the cervical and thoracic vertebrae.

Answer: (B)

The key idea is how the voice box (larynx) is controlled. The muscles that move and adjust the vocal cords are intrinsic laryngeal muscles located inside the larynx itself, and they are innervated by branches of the vagus nerve. External neck muscles can influence the larynx’s position, but they do not directly control voice production. So saying the voice box is controlled only by neck muscles is not accurate.

By contrast, the other statements reflect true anatomical relationships. The muscles around the shoulder blades help you sit up straight by stabilizing and positioning the scapula. The back includes both axial (spine-related) and appendicular (limb-related) muscles. And the rhomboids originate from both cervical and upper thoracic vertebrae, spanning those regions.