SPD

Find an interesting article (news or primary literature) about the nervous system and tie it into material from Chapter 45 or 46.

http://www.whitehalljournal.com/article/20121211/NEWS/312119996/1636/LIFESTYLE

This article explores SPD, or sensory processing disorder. SPD is a condition where the person affected is either oversensitive or undersensitive to one or more environmental stimuli. As stated in Chapter 46, the process of perception starts with sensory receptors where a stimulus creates an action potential. The signal is then amplified and transmitted to the central nervous system where the information is processed. For someone to be oversensitive or undersensitive, there must be a functional problem in this system. The cause and cure for this disorder has not been identified.