blood type cognitive declineNeuroscience NewsJune 3, 20150 min read Findings indicate that smaller volumes of grey matter are associated with non-‘O’ blood types. Image credit: The researchers. Join our Newsletter I agree to have my personal information transferred to AWeber for Neuroscience Newsletter ( more information ) Sign up to receive the latest neuroscience headlines and summaries sent to your email daily from NeuroscienceNews.comWe hate spam and only use your email to contact you about newsletters. We do not sell email addresses. You can cancel your subscription any time.