INSIDE THE BRAIN
'(<a href="http://www.j-archive.com/media/2006-05-17_J_30.jpg" target="_blank">Cheryl of the Clue Crew reads the clue after hitting Jon on the knee with a small mallet.</a>)  The knee jerk reflex involves just one of these connection sites between neurons; most, like the blink reflex, use more than one'
synapses