Head restraint: It is meant to protect the occupants of front seats from whiplash injury of the neck in case of a rear impact. It is usually fixed into the top of the seat back and is adjustable so that the top is at the eye level of the passenger. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostHazard Flasher Next PostHelper spring