What is the primary purpose of the headrest?
Active and passive safety
Explanation
The **headrest** is a **passive safety** device in vehicles. Its main function is to **protect the neck and cervical spine** in the event of a sudden impact, such as an accident. This helps prevent serious injuries to the upper part of the spinal column.
For the headrest to be effective, it is crucial to adjust it correctly. The top of the headrest should be at the same height as the top of the passenger's head. Additionally, the distance between the head and the headrest should be **four centimeters or less**.
In summary, the headrest is not designed to rest the head or increase seat comfort, but to **protect the neck in the event of an accident**.
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