Why does Wiesel describe so little of the time period between his fathers death and the liberation of Buchenwald

In the book Night

Throughout the horrors of his captivity, Wiesel states that he needed to be strong for his father. He needed to survive for his father. After his father's death, he no longer feels as though he has anything to live for. It can be assumed that he no longer paid attention to the world around him. His lack of detail about that is due to the fact that he no longer cared about what was going on.