These relatively short, damp wormlike creatures were created deliberately in the 33rd century AT to fulfil a role - to help baselines organize and recall memory better.
Working on then-ancient information indicating that baselines associate memories strongly with olfactory sensory data, the researchers generated a lifeform that could live indefinitely off of human mucus with little or no aggravation of the mucus membranes. These creatures would be induced to enter a sinus cavity where their 'body odor' could be used as a memory-baseline trigger. To change trigger states, new grubs would be introduced which would eject the old grub(s) for safe storage (later versions would cause memory grubs not in contact with body temperature mucus to cocoon).
Depending on the model and the system used, experiences could be tagged with one or up to eight memory grub scents. Later variants allowed for multiple grubs to be generated with the same scent patterns - early ones were simply grown with randomly generated scent patterns.
Text by John B
Initially published on 26 January 2007.