Which of the following provides functional imaging of brain blood flow and oxygen use?
Functional imaging of cerebral blood flow and oxygen metabolism traditionally relies on coupling between neuronal activity and hemodynamics. Functional magnetic resonance imaging exploits this by detecting changes in deoxyhemoglobin paramagnetism following activation, providing indirect maps of regional flow and oxygen extraction. Increased activity elevates local perfusion, altering signal intensity. Computed tomography images X-ray density for structure, EEG measures electrical potentials with limited spatial specificity, diffusion tensor imaging tracks water diffusion anisotropy for tract a
Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.