In fMRI color maps, which color scheme most commonly indicates higher neural activity?

In fMRI color maps, which color scheme most commonly indicates higher neural activity?

• A. Red and Yellow
• B. Blue
• C. Green
• D. Purple

Answer: (A)

Warmer colors indicate higher neural activity on fMRI color maps because the color scale maps the magnitude of the BOLD signal to colors from cool to warm. The BOLD signal reflects changes in blood oxygenation linked to neural activity, and in the common “hot” color schemes, blue or green represent lower activity while red and yellow mark the strongest activation. Green and purple are not typically used to signify peak activity. So, red and yellow are the best indicators of higher neural activity.

Warmer colors indicate higher neural activity on fMRI color maps because the color scale maps the magnitude of the BOLD signal to colors from cool to warm. The BOLD signal reflects changes in blood oxygenation linked to neural activity, and in the common “hot” color schemes, blue or green represent lower activity while red and yellow mark the strongest activation. Green and purple are not typically used to signify peak activity. So, red and yellow are the best indicators of higher neural activity.