When families increase dialogue between children and adults, children’s cognitive skills improve quickly as language-processing parts of the brain grow.SEE ALL IMAGING CENTER NEWS
Who We Are
The Athinoula A. Martinos Imaging Center is a core facility at MIT that provides access to state-of-the-art brain imaging technologies for MIT researchers and their collaborators throughout the world who study a wide range of topics in basic and clinical neuroscience. A joint project of the McGovern Institute and the Division of Health Sciences and Technology, the center also has a close relationship to the Martinos Center for Biomedical Imaging at Massachusetts General Hospital. The imaging center is made possible through major gifts from Patrick and Lore Harp McGovern and from the Martinos family of Athens, Greece.
Our Imaging Technologies
Magnetic resonance imaging (MRI), the most widely used form of brain imaging, uses magnetic fields and radio waves to produce detailed images of the structure and function of the brain. Functional MRI (fMRI) is a technique that measures the activity of different brain regions as subjects lie inside the MRI scanner. It works by measuring changes in blood flow and blood oxygenation that follow changes in neuronal activity. By comparing the signals obtained as subjects perform different tasks within the scanner, researchers can generate maps that show which parts of the brain are involved in different cognitive processes.
Magnetoencephalography (MEG) is the measurement of tiny magnetic fluctuations at the surface of the head that result from electrical activity within the brain. Electrical currents flowing through neurons generate weak magnetic fields that can be recorded at the surface of the head using very sensitive magnetic detectors known as superconducting quantum interference devices (SQUIDs). MEG can detect the timing of magnetic signals with millisecond precision. This is the timescale on which neurons communicate, and MEG is thus well suited to measuring the rapid signals that reflect communication between different parts of the human brain. MEG is a purely passive method that relies on detection of signals that are produced naturally by the brain. It does not involve exposure to radiation or strong magnetic fields, and there are no known hazards associated with MEG.
Electroencephalography (EEG) is a method to record electrical activity in the brain. In this method, electrodes are mounted on a flexible cap that is fitted to the surface of the scalp, allowing researchers to record electrical signals from the brain, which are conducted through the skull. Although EEG lacks the spatial resolution of fMRI, it provides much more detailed information about the timing of brain activity.
Near-infrared spectroscopy (NIRS) is a technology that uses the absorption of near-infrared light to reveal changes in blood flow related to brain activity. Unlike fMRI, which requires participants to remain motionless inside the scanner, NIRS involves placing a cap with light emitters and detectors on the participant’s head. This technology is particularly useful for researchers studying brain activity in infants because these young study volunteers can sit on their caregiver’s lap, with some freedom of motion while they participate in research.
The staff at the Martinos Imaging Center direct the research and administrative activities of the center.MEET OUR STAFF