Neuroimaging can be used to directly monitor the heart-brain interaction. Disruptions of the normal heart-brain interaction are common. Abnormalities can originate with cardiac or cardiovascular processes that have neurologic effects, such as embolic stroke and low perfusion states, or with neurologic processes that have direct cardiac effects, such as focal brain lesions caused by stroke or multiple sclerosis (MS).
Brain imaging techniques have advanced to the point where regions involved in changes in autonomic arousal during behavior can be located with precision. These regions can be localized by identifying lost function from specific lesions or by using functional brain imaging, such as positron emission tomography (PET) or magnetic resonance imaging (MRI). This article describes imaging of heart-brain interactions, focusing on functional imaging techniques that have enhanced our understanding of these interactions.