coherence analysis
Statistical method measuring the degree of phase consistency between signals from different brain regions.
Full Definition
Coherence analysis is a frequency-domain statistical technique used in neurophysiology to quantify the degree of phase relationship and synchronization between signals recorded from different brain locations. The coherence value ranges from 0 (no relationship) to 1 (perfect correlation) and is calculated for specific frequency bands. High coherence between brain regions suggests functional connectivity and coordinated neural activity. This analysis is particularly valuable in studying epilepsy networks, assessing cognitive processes, and understanding how different brain areas communicate during various behavioral states or pathological conditions.
Usage
Usage note: Separate words when used as noun; hyphenate when used as compound adjective.
In Context
- "Coherence analysis revealed increased synchronization between temporal regions during seizure activity." — Epilepsy network study
- "The coherence analysis demonstrated disrupted connectivity patterns in the alpha frequency band." — Cognitive neuroscience research