Answer:
Neurofibrillary Tangles.
Step-by-step explanation:
Neurofibrillary tangles occur when the axon fibers become twisted together. This is due to a chemical change in the structure of tau protein, which is responsible for the formation of microtubules that carry nutrients and information on neuron extensions to your cell body and vice versa. Modified, the protein destabilizes the microtubules, leading to the breakdown of this system and the death of neurons.