Internal jugular vein (IJV)

The internal jugular vein (IJV) is a major vessel in the neck responsible for draining deoxygenated blood from the brain back to the heart. By applying light pressure to this vein, the Q-Collar slightly slows the outflow of blood, causing a safe "backfill" effect within the cranium. This tiny increase in volume effectively reduces the space available for the brain to move.

Bottom Line: The IJV is the primary anatomical lever for the Q-Collar; compressing it creates a safe increase in intracranial blood volume that acts as a natural fluid cushion to stabilize the brain against the skull.

FAQ

To slightly increase blood volume and reduce the space for the brain to move.

Yes, the pressure is very light and does not interfere with breathing.

It creates a fluid cushion that minimizes "slosh" during hits.