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What is f-MRI

Chapter 11
Examining Biological Foundations of Human Behavior
Functional magnetic resonance imaging (f-MRI) measures the small changes in blood flow that occur with brain activity. fMRI is usually able to detect abnormalities within the brain that cannot be detected with other imaging techniques.
Published in Chapter:
Functional Human Brain Mapping
Shahzadi Malhotra (Chacha Nehru Hospital, India) and Gaurav Rajender (SMS Medical College and Hospital, India)
Copyright: © 2020 |Pages: 15
DOI: 10.4018/978-1-7998-2860-0.ch011
Abstract
Neuroimaging plays a crucial role in psychiatry and mental health as it can potentially be used to identify causal factors, biomarkers of a disorder, prognosis or treatment, elucidate biological pathways along with informing and monitoring newer therapies. Early and prophylactic interventions present an emerging future direction in clinical psychiatry, and neuroimaging has the potential to help in identification of individuals at risk and monitor the effects of intervention. In the chapter an attempt is made to elaborate the concept of brain mapping, and differences between structural and functional brain imaging are discussed. The chapter focusses on advent of neuroimaging in psychiatry along with discussing the major functional neuroimaging techniques.
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Chapter 75
An f-MRI Study of an Adaptable EMG Prosthetic Hand with Biofeedback
Functional MRI (fMRI) measures signal changes in the brain that are due to changing neural activity, by a mechanism referred to as BOLD (blood-oxygen-level dependent) effect. Increased neural activity causes an increased demand for oxygen, and the vascular system actually overcompensates for this, increasing the amount of oxygenated hemoglobin (haemoglobin) relative to deoxygenated hemoglobin. Because deoxygenated hemoglobin attenuates the MR signal, the vascular response leads to a signal increase that is related to the neural activity.
Published in Chapter: An f-MRI Study of an Adaptable EMG Prosthetic Hand with Biofeedback; From: Encyclopedia of Healthcare Information Systems
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