Britannica Sources used in this answer

What is path integration in spatial navigation?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Patient H.M. and short-term memory loss explained — hippocampus Learn about Henry Molaison (better known as “patient H.M.”), whose short-term memory loss following a lobotomy helped researchers to understand how brain structures are related to brain function.

In the context of spatial navigation, path integration is the process of using self-motion signals to estimate the distance and direction an animal has traveled.1

This mechanism allows an individual to maintain a sense of their current position relative to a starting point without relying solely on external landmarks. Within the brain, this process is thought to be supported by grid cells, which are predominantly found in the medial entorhinal cortex. These cells fire in a regular triangular pattern as an animal explores its environment, providing a periodic spatial framework that contributes to the representation of location and the calculation of movement vectors.1

While path integration provides a continuous estimate of position based on internal movement cues, it works in conjunction with other neural systems—such as place cells in the hippocampus—to form a comprehensive spatial map of the environment.1