Here's a spot-on blog in Tricycle from Lama Jampa Thaye described as "a scholar, author, and meditation master from the UK, trained in both the Karma Kagyu and Sakya traditions of Tibetan Buddhism." We Are Not Kind Machines: A Radical Rejection of Scientific Buddhism
Science seems omnipresent in the modern world, and its explanatory force and benefits are hard to deny. Indeed, its success has even led some, including a number of well-regarded figures in the contemporary Buddhist world, to argue that the dharma itself must be made more “scientific” if it is to survive.
While science itself is not dangerous to the dharma, the appeal for a “scientific Buddhism,” an insistence that Buddhism must accord with the materialist propositions often paired with scientism, most definitely is. Such a Buddhism is not the dharma.
Now, it may very well be that brain activity changes during meditation. But it's difficult to see how knowing this could contribute anything significant to the process of dissolving the twin obscurations of disturbing emotions and nescience, a dissolution that alone brings about enlightenment. Would, for instance, Jetsun Milarepa have achieved decisive realization more swiftly if he had possessed a knowledge of neurology? The plain unvarnished truth is that while a variety of physical effects—from the modification of pulse rate to altered frequency of brain waves—may accompany meditation, these effects are not the source of the experience of the meditating mind any more than a lessening of indigestion.
I take Lama Jampa to be saying that the study of brain activity should not be confused with the study of the psychological activity of mind. To view the world as if the brain is the ground for explaining the world is the physiological leaning view that is all too often stained by materialism. To view the world as if the mind is the ground for explaining the world is the psychological view. Brain activity is an objectification of mind activity. To the extent that the objectification of mind activity is taken literally and mind is being explained by the activity of brain physiology, then to that extent the view is materialistic. Objectification is to mind what literalization and materialization is to the practice of the Buddha Dharma, i.e. false thinking about mind.