Final answer:
The type of forgetting linked to unconscious origins is known as repression, a psychoanalytic concept where unpleasant memories become inaccessible to conscious thought, unlike the memory impairments caused by brain trauma such as anterograde and retrograde amnesia.
Step-by-step explanation:
The type of forgetting most closely associated with unconscious origins is known as repression. This is a defense mechanism proposed by psychoanalytic theory, where undesirable memories are pushed into the unconscious, thereby becoming inaccessible to conscious thought. Repression is different from anterograde amnesia, which involves an inability to form new memories due to brain trauma, and retrograde amnesia, which is a loss of memory for events that happened prior to a trauma. With repression, the forgotten information is thought to be buried due to its threatening or unpleasant nature, rather than because of any physical injury to the brain.
Regarding the formation of new memories, the terms construction and reconstruction are pertinent. Construction refers to the process of creating new memories. Reconstruction involves the modification of memories each time they are retrieved, which can lead to distortions over time. These processes help to explain why memories can sometimes be inaccurate or influenced by our perceptions and biases.