To send 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 sending content to .
To send content items to your Kindle, first ensure firstname.lastname@example.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 sending to your Kindle.
Note you can select to send to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be sent 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.
It took almost a century and several discoveries in the seemingly unrelated field of quantum physics to allow researchers to be able to use changes in blood flow and volume to identify areas of neural activity. The most widely used techniques to do so include positron emission tomography (PET) and functional magnetic resonance imaging (fMRI). In addition to measuring task-induced changes in cerebral blood flow (CBF) or cerebral metabolism, PET imaging can be used to directly and selectively assess the action of different neurotransmitters in the human brain in vivo. The change in the BOLD signal triggered by a brief neural event is known as the hemodynamic response (HDR). It is important to keep in mind that, as is the case with any experimental method, there are limitations and potential pitfalls that one needs to consider when designing, analyzing, or interpreting experiments using PET or fMRI.