An 8-year-old child fell to the ground from an 8-foot-high playground structure. He is lying on his back and moving very little. What sign or symptom would make you call 911 right away?

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

H tricky one let me think and get back to u