Wavelength (m) Microwave Visible Ultraviolet X-Ray Gamma Ray Radio + 103 102 105 100 IDB What is the only part of the EM spectrum that humans can see? Microwaves Visible light Ultraviolet light Infrared light

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later