The impaired functioning of autobiographical memory due to damage or disease can have profound effects on an individual's episodic memory. This can skew an individual's lifespan retrieval curve and influence the presentation of the reminiscence bump. Memories an individual has for personal life events can show a different pattern than the average individual if they have brain damage caused by an event like an accident, a blow to the head or disease. For these individuals with brain damage, the lifespan retrieval curve can look different. An example of this is an individual having the reminiscence bump between the age of 5 and 13 rather than 10 to 30, which is the pattern for the average individual.