resulting in or characterised by progressive degeneration and/or death of neurones (nerve cells)

partial waking up from sleep accompanied by violent behaviours, such as screaming, flailing around, sleepwalking, or mumbling

a sleep disorder in which a person suffers recurring frequent nightmares

unusual, strange

a difficult, unpleasant, or confusing situation

affecting the mind

a piece of equipment for lifting heavy objects

happening by chance

repetition of information in order to keep it in short-term memory

cause (pain, distress, or worry) to become less severe or serious