@ddljohn-- It is important to test motor reflexes in children regularly. Since they are still growing and developing, doctors will want to make sure that their neurological reflexes are developing properly as well.
For adults, checking various motor reflexes may not be necessary during every check up. But they are absolutely necessary if an individual has symptoms that suggest problems with the nerves. A simple motor reflex test in that part of the body can tell the doctor the presence and extent of the problem so that further testing can be done.
Although motor reflex testing seems very simple, almost like a game, they have great significance as far as physical symptoms are concerned.