Lack of medial brow movement. Facial laceration

Thank you for your question. I suggest that you move forward and consult with a board certified facial plastic surgeon to learn more about the options available to you. The goal of facial plastic surgery is to create a youthful, attractive and natural looking appearance.
Best wishes,

I've successfully treated many patients who've suffered from facial lacerations. The numbness and muscle weakness is caused by injuries to underlying muscles and nerves. This could be due to swelling, nerve damage or strain and sometimes require up to a year to heal fully. There are cases where the injury leads to permanent damage, but this is very rare. Scheduling an appointment with a board-certified plastic surgeon should help resolve your concerns.

There may be some motor nerve damage from the trauma.  In similar situations, the nerve can regenerate and improve over time.  It may take up to or greater than a year.  A comprehensive exam with a specialist would be helpful.  Good luck.