The failure to recall important information due to a physical injury to the head is known as dissociative amnesia: False.
Dissociative disorder can be defined as a type of psychological (mental) disorder in which an individual experiences a disconnection and lack of continuity between his/her memories, thought processes, emotions, behavior, assimilation, perception, identity, and actions.
Thus, a dissociative disorder is characterized by a disconnection or separation of some important facets of an individual's personality that are normally in synchronization or work together.
In conclusion, we can deduce that dissociative amnesia is not a failure to recall important information as a result of a physical injury to the head.
Read more on dissociative disorder here: https://brainly.com/question/25764595