Hi, thank you for getting in contact, and I hope you are well too.
Some of the core modules that I have undertaken during my Masters (back in 2016) includes fundamentals in brain imaging methods, Matlab programming, advanced brain imaging methods, application of brain imaging in cognitive neuroscience and current research in psychology. On top of these, I have also completed a research placement and my research project. However, I have checked on the UoB website, and these are the current modules that one would take for the brain imaging and cognitive neuroscience Masters in 2020:
Applications of Brain Imaging and Cognitive Neuroscience
Current Research and Practice in Psychology
Fundamentals in Brain Imaging
Introduction to Neuroscientific Methods
Proposing Research in Psychology
Foundations of Data Science
Optional taught modules currently include:
Advanced Brain Imaging Methods
Application of Electrophysiological Approaches in Cognitive Neuroscience
Unfortunately, I do not know much about the human-computer interaction master degree so cannot give you an informed answer. The brain imaging and cognitive neuroscience Master degree is more focused on brain imaging, on theories, their usage and also analyses of them. The human-computer interaction Master degree, as seen from the UoB site, seem to be focusing on analysing problems and existing solutions, developing new ideas and building or evaluating prototype systems. I do think they will have some form of relation, but they seem to be rather different in focus, so I think ultimately, it will depend on what you want out of your Masters, and also your future plans.
I hope my answer has been helpful.