The area right behind or slightly behind the horses ears is the poll, you'll also find the bridle path in this area if the horse has one.
a bridlepath :)
A Bridlepath
When you clip or shave the section of mane behind the horses ear, it is called the bridle path. It is on www.Howrse.com riding level 2.
If you are talking about shaving about a 1-inch section of mane behind the horse's ears, that's called a bridlepath. It is the area that the halter or bridle sits on.
Bridlepath
Bridlepath
Bridlepath
A bridle path.
A Bridal Path.
The bridle path
It is called a buzz mane
Cutting the mane behind the horse's ears is called trimming the bridle path.