from Section IV - Cognitive Disorders
Published online by Cambridge University Press: 10 January 2011
Abstract
Neurochemical imaging offers an opportunity to study at a molecular level in-vivo the neuronal substrates that underpin Alzheimer's disease (AD) and related disorders, such as mild cognitive impairment (MCI). In particular, proton magnetic resonance spectroscopic imaging (1H MRSI) is unique among diagnostic imaging modalities because the method can measure several different brain metabolites simultaneously, including N-acetylaspartate (NAA), a neuronal integrity marker, and myo-inositol (MI), a potential glial marker. The goal of this chapter is to review key findings of 1H MRSI in AD, MCI and aging, and to discuss the potential value of this technology for diagnosis and prognosis of AD as well as for the assessment of therapeutic intervention. Other neurochemical imaging technologies such as direct mapping of neurotransmitter systems using emission tomography (PET) tracers and new trends, such as amyloid PET imaging are also briefly discussed.
Introduction
Alzheimer's disease (AD) is the most common cause of dementia and a growing health problem globally, affecting 20% of the population over 80 years of age (Ferri et al., 2005). Currently, the definite diagnosis of AD can only be made through autopsy to find the pathological hallmarks of the disease: microscopic amyloid plaques and neurofibrillary tangles. Macroscopically, AD is characterized by progressive loss of brain tissue that leads to a rapid decline in cognitive function.
To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.