What is defined as the part of the reins passing between the thumb and fingers and out the top of the hand?

The bight of reins refers to the portion of the reins that is looped or passes between the thumb and fingers and exits out of the top of the hand. This part is essential for maintaining proper control and connection with the horse during riding. Understanding this concept is crucial for instructors, as it contributes to effective communication with the horse through the reins.

In contrast, a cavesson is a type of noseband used on a bridle and is not related to the specific positioning of the reins. Cold backed refers to a horse that is resistant to being saddled or ridden, and cross-firing describes a gaiting issue where a horse interferes or crosses its hind legs while moving. Therefore, none of these terms relate to the specific definition of the part of the reins in question.