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Functional MRI
4
Feb

Overview

Functional MRI measures brain activity using blood oxygen level dependent contrast. It maps regions involved in tasks and resting state networks. fMRI supports research and presurgical planning.

Task Based fMRI

Task based fMRI identifies eloquent cortex for language and motor functions. It guides surgical planning to preserve critical areas. Patient cooperation and task design affect results.

Resting State fMRI

Resting state fMRI evaluates functional connectivity without tasks. It is useful in patients unable to perform tasks and in research. Analysis methods continue to evolve and standardize.

Clinical Integration

fMRI complements structural imaging and neurophysiology in presurgical assessment. It informs risk benefit discussions and surgical approaches. Validation and multidisciplinary review support clinical use.

Functional MRI fMRI
4
Feb

Overview

fMRI detects blood oxygen level dependent BOLD signal changes related to neuronal activity enabling functional mapping of brain regions.

Technique

Task based or resting state paradigms and careful preprocessing are required for reliable activation maps.

Clinical Uses

Preoperative functional mapping for language and motor areas and research into brain networks and cognition.

Limitations and Safety

Susceptible to motion and physiologic noise. Interpretation requires expertise and correlation with clinical data.