Memory trace, also known as engram, refers to a specific representation of past events or experiences stored in the brain. There are several synonyms for the term memory trace, including memory engram, memory imprint, memory impression, memory remnant, memory retentivity, and mnemonic trace. These synonyms all refer to the same thing and are used interchangeably in discussions about the science of memory. The term memory trace is commonly used in the context of neuroscience research to describe the physiological changes that occur in the brain when memories are formed and retrieved. Understanding how memory traces are created and maintained is essential to improving our understanding of human cognition and memory.