Neurologic related forms of aggression are relatively rare. Most notable among these syndromes is Rabies, in which affected animals can become unpredictably aggressive. Their aggression is often triggered very easily by sudden noises or movements.If you see a dog wandering the streets, appearing very alert and anxious and becoming aggressive with any individuals encountered, get inside and call the appropriate authorities. This is an emergency situation and warrants a call to 911.Other potential neurologic causes of aggression include brain tumors and partial psychomotor seizures.These can usually by ruled out with a good behavioral history. These disorders are completely unpredictable. That is they they have no reliable situational causes or triggers.