A recent advance in brain measurement and analysis techniques has enabled to read human brain information non-invasively, to uncover brain functions, and to link a brain and a machine/computer. In this class, we will study neural mechanisms of information transmission by action potentials and brain measurement techniques (physical principles, advantages and disadvantages, analysis algorithms) such as EEG, MEG, and MRI. Furthermore, we will focus on recent technologies such as brain machine/computer interfaces and brain decoding.