The glymphatic pathway has been proposed as a key contributor to the clearance of fluid and metabolic waste products, such as amyloid beta and tau, from the brain. Recently, dynamic contrast-enhanced MRI has been used to visualize the glymphatic system and monitor CSF-interstitial fluid exchange in normal and Type 2 diabetes mellitus rats, with the latter showing impaired clearance of interstitial fluid. It has also been proposed that glymphatic function may be compromised in motor neuron disease (MND) patients.