What is a place field in hippocampal research?

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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 hippocampal research, a place field refers to the specific, localized area within an environment that triggers a particular place cell to increase its firing rate.1

As an animal moves through its surroundings, these neurons act as a neural map of the environment. When the animal enters the specific location corresponding to a cell's place field, that neuron fires more rapidly. The firing of these cells is context-dependent; a cell may have a different place field in a new environment or may not fire at all, a process known as remapping. These spatial representations are essential for navigation and are supported by input from other areas, such as boundary cells, which help define the preferred firing locations relative to environmental boundaries.1