11.   The acid is also abundant in the synapses, which transmit nerve signals.

12.   The device, called a pulse generator, sends an electric current to his brain, jamming nerve signals from the globus pallidus.

13.   The disease can also affect balance or the ability to walk, by interrupting nerve signals between the central nervous system and the feet.

14.   The injections must be repeated every three to four months, because the nerve signals eventually find other pathways to the muscles.

15.   The new theory concerns a family of chemicals called cholinesterase inhibitors that short-circuit some nerve signals.

16.   The pulse generator will send an electric current to his brain, jamming nerve signals from the globus pallidus.

17.   The trick is to manipulate the nerve signals that help your brain work out precisely which direction is vertical.

18.   Then hair cells send nerve signals to the brain.

19.   This potentially lethal toxin, when tamed and distilled, interrupts some nerve signals, and is currently used to treat muscle disorders and wrinkled skin.

20.   When nerve signals fail, illness can result as muscles fail to respond to the nerves and become numb.