spike-triggered average
Also written as: STA — spike-triggered average
Statistical method to determine the stimulus features that precede action potentials.
Full Definition
Spike-triggered averaging (STA) is a computational technique used to characterize the stimulus features that are most likely to trigger action potentials in a neuron. The method involves averaging all stimulus segments that precede spikes by a fixed time window, revealing the typical stimulus pattern associated with neuronal firing. STA is commonly used to map receptive fields of sensory neurons and to understand how neurons encode information about their inputs. The resulting average represents the linear filter that best describes the neuron's stimulus-response relationship. This technique has been instrumental in understanding visual, auditory, and somatosensory processing in the nervous system.
Usage
Usage note: Also known as reverse correlation in some contexts.
In Context
- "The spike-triggered average revealed the cell's preference for oriented visual stimuli." — Visual neuroscience study
- "STA analysis identified the temporal filter characteristics of the auditory neuron." — Computational analysis