News Release

How the brain creates the experience of time

Time-sensitive neurons fatigue and skew our perception of time

Peer-Reviewed Publication

Society for Neuroscience

How the Brain Creates the Experience of Time


Credit: Hayashi and Ivry, JNeurosci 2020.


Neurons in the supramarginal gyrus (SMG) fire in response to a specific length of time. If repeatedly exposed to a stimulus of a fixed duration, the neurons fatigue. Since other neurons continue firing normally, our subjective perception of time becomes skewed.

Hayashi and Ivry measured brain activity with fMRI as human participants engaged in a time comparison task. Healthy adult participants viewed a visual adaptor (a grey circle) for a set length of time, 30 times in a row. After this adaptation period, they were shown a test stimulus and indicated its duration. If the adaptor duration was long, the participants underestimated time; if the adaptor duration was short, they overestimated time. Activity in the SMG decreased when the adaptor and test stimulus were similar in length, indicating neuron fatigue. The extent of skewed time perception correlated with how much the activity in the SMG decreased -- greater fatigue led to greater time distortion.


Manuscript title: Duration-Selectivity in Right Parietal Cortex Reflects the Subjective Experience of Time

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