In 2005, a letter published in Nature described human neurons responding to specific people, such as Jennifer Aniston or Halle Berry. The exciting thing was that they did so regardless of whether they were shown photographs, drawings, or even images of the person’s name. The neurons were multimodal. You are looking at the far end of the transformation from metric, visual shapes to conceptual information.
Neuron Activation in Left Prefrontal cortex respond to work such as AI Neuron Activation (actually word embedding in the paper)
Semantic encoding during language comprehension at single-cell resolution