Amnesia is when an individual loses all or some of their memory.
It can be caused by a blow to the head, brain illnesses, or an extreme emotional experience.
Anterograde amnesia - when the individual struggles to remember regular or day to day events and activities after a physical injury or accident.
Retrograde amnesia - when the individual struggles to remember events or activities that happened before their injury.
Transient global amnesia - disruption to the memory that lasts for around 4-12 hours normally following trauma.
Fugue amnesia - when the individual cannot remember who they are and struggles with identity.
More top news
Yamaha rider Jorge Lorenzo set the pace in practice for Sunday's British Grand Prix.
Some of the world's biggest Asian music artists tell ITV News Central why the Midlands is home to the bhangra scene.
Becoming dry overnight, mainly dry Saturday.