The bone in the front of your neck is called the hyoid bone. It’s a small, U-shaped bone that sits in the midline of your neck, roughly at the level of the fourth cervical vertebra, just above the Adam’s apple. What makes the hyoid remarkable is that it’s the only bone in your entire body that doesn’t directly connect to another bone. Instead, it’s held in place entirely by muscles, ligaments, and cartilage, earning it the nickname “the floating bone.”
Where Exactly the Hyoid Sits
The hyoid bone is positioned below the jawbone and just above the thyroid cartilage, which is the structure most people feel as the Adam’s apple. You can sometimes feel the hyoid by gently pressing on the front of your neck above the Adam’s apple, though it’s not as easy to see or feel through the skin as the cartilage below it.
Despite being small (roughly the size and shape of a horseshoe), the hyoid serves as an anchor point for a large network of muscles. One group of muscles connects the hyoid to the jaw and skull above it, while another group connects it to the voice box and breastbone below. This arrangement creates a kind of muscular suspension system that lets the hyoid move up, down, forward, and back as needed.
What the Hyoid Bone Actually Does
The hyoid plays a central role in two things you do constantly: swallowing and speaking. Every time you swallow, the hyoid bone lifts upward and forward, pulling your voice box with it to close off your airway and guide food safely into your esophagus. Studies using video imaging of swallowing show that the hyoid and the thyroid cartilage below it move in tightly coordinated patterns during this process.
For speech, the hyoid anchors the base of the tongue and helps control tongue movement. The muscles running between the hyoid and the tongue allow for the precise, rapid adjustments your tongue makes when forming different sounds. Without this floating bone acting as a stable platform, the fine motor control needed for clear speech wouldn’t be possible.
The Hyoid Bone and Sleep Apnea
Because the hyoid anchors the tongue muscles, its position directly affects how open your airway stays during sleep. In people with obstructive sleep apnea, the hyoid bone often sits lower than usual, farther from the jawbone. Research has found that when the distance between the hyoid and the lower edge of the jaw exceeds about 19.5 millimeters, a person is more likely to have severe sleep apnea, with more breathing disruptions, lower oxygen levels, and more fragmented sleep.
This relationship works in both directions. Oral appliances that push the lower jaw forward during sleep also raise the hyoid bone’s position by as much as 9 millimeters, which helps keep the airway open. Surgical procedures that reposition the hyoid have been shown to reduce the severity of sleep apnea by an average of 38%. If you’ve been told you have sleep apnea, the position of this small bone is part of why treatment focuses so much on jaw alignment and tongue positioning.
Why It’s Not the Adam’s Apple
People often confuse the hyoid bone with the Adam’s apple, but they’re two different structures. The Adam’s apple is formed by the thyroid cartilage, a shield-shaped piece of cartilage that protects the voice box. You can easily see and feel it through the skin. The hyoid bone sits just above this cartilage and is much harder to feel from the outside. While the thyroid cartilage is made of cartilage (flexible connective tissue), the hyoid is true bone.
The two structures do work closely together. During swallowing, they move in nearly identical patterns, rising and falling in sync. But anatomically, they’re distinct: the thyroid cartilage is part of the larynx (voice box), while the hyoid is an independent bone suspended in the soft tissue of the neck.
Hyoid Fractures and Forensic Science
The hyoid bone rarely breaks under normal circumstances. When it does fracture, the cause is almost always some form of direct force applied to the neck. This makes hyoid fractures especially significant in forensic investigations. During an autopsy, a broken hyoid bone frequently indicates that compressive forces were applied to the neck, and it’s one of the key findings investigators look for in cases of suspected strangulation.
Forensic pathologists can even distinguish between different types of neck trauma based on how the hyoid breaks. In manual strangulation, the fracture fragments tend to be displaced inward, toward the center of the neck, because of the horizontal force applied by hands or arms. In other scenarios, the fragments shift in different directions. Advanced imaging techniques that create 3D reconstructions of the bone allow investigators to measure the exact angle of fracture displacement, helping them determine the direction and type of force that caused the injury.