Digital reconstruction of part of the network in the dentate gyrus, with two parvalbumin-expressing interneurons (red and yellow), the granular cell they inhibit (blue) and visualization of the synaptic connections (black & white photographs). Image: Espinoza et al, IST Asustria
Keeping similar memories apart through lateral inhibition - neuroscience short news

Neuroscientists have figured out how very similar, but still distinct, memories are formed in the brain without overlap. Key to this are inhibitory parvalbumin-expressing neurons in the hippocampal dentate gyrus that inhibit neighboring neurons in a highly specialized neural network structure. After separation of similar memories in the dentate gyrus, the CA3 region of the hippocampus then stores the memories. This makes it e.g. possible to find your car when you had parked it at slightly different locations in the parking lot at work.

Read the full story: Institute of Science and Technology Austria
Scientific publication: Nature Communications