Cysticercosis is a sickness caused by ingesting the tapeworms found in pork. When tapeworm larvae spreads to the human brain, it is a very serious problem resulting in a condition referred to as neurocysticercosis. If a tapeworm infestation problem exists, there are medications sold over-the-counter for this problem.
Glutamate. Glutamate is an excitatory relative of GABA. It is the most common neurotransmitter in the central nervous system-as much as half of all neurons in the brain-and is especially important in regards to memory. Curiously, glutamate is actually toxic to neurons, and an excess will kill them.
It is believed that too much stimulation of nerve cells by glutamate may be responsible for the degeneration of nerves that occurs in some neurological diseases such as Alzheimer's disease. Like other neurotransmitters, glutamate is produced and released by nerve cells in the brain.