Biofeedback: Biological monitors reflect ongoing states of the nervous system and provide ongoing information to enhance self-regulation of the nervous system. Can include muscle tension, thermometers for hand warming, heart rate variability, EEG, etc.
EEG Biofeedback: Biofeedback that uses an EEG to monitor brain waves.
Neurofeedback: Biofeedback with any monitor of brain activity: EEG (brainwaves), HEG (Infra-red emissions), fMRI (functional Magnetic Resonance Imaging), MEG (magnetoencephalography), etc.
Neurotherapy: Various technologies to enhance brain function including biofeedback, neurofeedback, cranial electrical stimulation, direct current transcranial stimulation, pulsed electromagnetic frequencies, etc. I have all these devices.