parcellation
Division of brain tissue into distinct anatomical or functional regions for analysis.
Full Definition
Brain parcellation is the process of subdividing brain tissue into discrete, non-overlapping regions based on anatomical, functional, or connectivity criteria. This fundamental step in neuroinformatics analysis enables region-of-interest studies and network-based analyses. Parcellation schemes can be anatomically-based (using structural landmarks), functionally-based (using activation patterns), or connectivity-based (using white matter tracts). Common atlases include the AAL (Automated Anatomical Labeling) and Desikan-Killiany parcellations, each providing different granularity and regional definitions for neuroimaging studies.
Usage
Usage note: Not 'parcellisation' in American English contexts; refers specifically to brain subdivision.
In Context
- "The Desikan-Killiany parcellation was applied to extract regional time series data." — Methods section
- "Functional parcellation revealed subject-specific network boundaries." — Research manuscript