Why do we dream? This question has been a constant one for scientists for a long time now. Most scientists explain dreaming as our way of organizing the information we have gathered throughout our day.

While we are asleep, our brain can swift through different stages of sleep. There are five different stages that we go through in order to fall asleep. The first stage can be considered as the transition period between wakefulness and sleep, and your brain produces theta waves. In the second stage, the brain starts producing rapid, rhythmic brain wave activity, our body temperature starts to decrease and heart rate begins to slow down. Stage 3 is said to be the transitional period between light sleep and a very deep sleep and our brain produces slow brain waves know as delta waves. Stage 4 is considered the deep sleep stage. Stage 5 is also know as Rapid Eye Movement (REM), in which your respiration rate and brain activity increases. Muscles become more relaxed and heavy dreaming occurs during this stage.

During REM sleep, your body becomes paralyzed to avoid you from getting up and acting out your dreams. These are some people who have a disorder in which they get up and act their dreams, which is dangerous for themselves and others around.

Scientists carried out an experiment and found out that deep sleep produces positive dreams whereas REM sleep produces negative dreams. About 75% of our dreams are negative and our parietal lobe is responsible four our dreaming. 

They say that dreams help us solve problems and survive, but there is not an exact and proved reason on why we dream.

picture: http://www.1000mumsmakingadifference.com.au/wp-content/uploads/Dreams.jpg

Alone

Sensory deprivation is now being used as a weapon. What is sensory deprivation? Sensory deprivation is the intentional removal of stimuli affecting one or all of the five human senses. Living without one of your senses can affect who you are. In this video we saw how scientists gathered individuals for an experiment. This experiment consisted of isolating these subjects in a small room for 48 hours. Before the isolation took place, they practiced some tests in these people and tested their skills involving their different senses. They computed the results and proceeded by putting them inside a dark room with no sound at all. During this 48 hour period, there were cameras inside the different rooms for the scientists to see their actions and how they changed during the process. I was surprised to see that after a day, the subjects started hallucinating and hearing sounds that were not there. They started talking to themselves and walking around the room. After the two day were over, a scientist took them out of the room and did the same tests on them they had done before the isolation. The results were worse. Their conclusion was that people who are/were isolated will loose some brain capacity, reduction in ability of abstract and fluid language. People who are outgoing will suffer more than people who enjoy spending time by their selves. I personally did not know that if you were isolated your brain would be damaged and this experiment was a new learning experience.

picture: http://scienceblogs.com/neurophilosophy/total_isolation_sensory_deprivation.bmp

Synesthesia

1. Synesthesia

Synesthesia is a neurological condition in which one sense is experienced though the perception of another sense. People with synesthesia can taste colors, or see colors when they hear something. They have a unique connection between senses; for example, a person may see the number 10 as the color yellow, or may say the color purple tastes sweet.

http://www.wisegeek.com/what-is-synesthesia.htm

2. Grapheme-Color Synesthesia

Grapheme-Color Synesthesia is one type of Synesthesia where a person associates numbers and letters with colors. It is involuntary and it is one of the most common and most studied forms of synesthesia. For example, a person with grapheme-color synesthesia can see the letter P and the color purple.

http://en.wikipedia.org/wiki/Grapheme–color_synesthesia

3. Ordinal - Linguistic Personification

A type of Synesthesia where ordered sequences, like days, months and letter have a link with personalities. Scientists have paid little attention to this type of synesthesia because it is not so common. For example, the month of november can be overlapped with the feeling of happiness.

http://en.wikipedia.org/wiki/Ordinal_linguistic_personification

4. Number-Form Synesthesia

A person with number-form synesthesia have a mental number line or a mental map of numbers that appear in an involuntary way whenever they think of numbers.

http://en.wikipedia.org/wiki/Number_form

5. Sound-Color Synesthesia

People with sound-color synesthesia associate color with sound. It can be broken down into 2 categories: narrow band and broad band. In the narrow band synesthesia, music expresses different shades and brightness. In broad band synesthesia, people see colors when they hear ordinary sounds, like the ringing of the alarm clock, airplane flyings, etc. Colors change in response to different sounds.

http://undacovabear.wordpress.com/2009/02/08/sound-colour-synesthesia/

6. Lexical-Gustatory Synesthesia

This is one of the rarest forms of Synesthesia and it is when a person can taste words. Some scientists have found that lexical-gustatory synesthesia is caused by early food experiences.

http://en.wikipedia.org/wiki/Lexical-gustatory_synesthesia

pictures:

http://cytowic.net/Smithsonian/image007.jpg

http://www.elchill.com/pictures/color_number_synesthesia.jpg

http://www.apartmenttherapy.com/uimages/sf/1016_syn01.jpg

http://jlim1131.web.unc.edu/files/2010/12/800px-Galton_number_form.svg_.png

http://www.medleague.com/blog/wp-content/uploads/music-color.jpg

http://www.epworthchurch.info/abc%20soup.gif

Mental Abilities: Genius, Savant and Autism

1. Explain in detail what "savant syndrome" means.

The Savant Syndrome is exceptional skills that seem to come out of nowhere without previous training or experience. Savant skills can include incredible memorization skills, outstanding mathematical skills, unaccountable ability to learn foreign language, calendar calculation, artistic and musical skills, and occasionally, sensing abilities. Savant skills generally occur in around 1% of people with autism, with Asperger’s Syndrome. These skills are usually found in all kinds of disability groups, such as loss of hearing or sight, people with brain injury, and people with bipolar or mental health conditions.

http://www.donnawilliams.net/savantsyndrome.0.html

2. What does genius mean?  Explain the difference between genius and savant.

Genius means a person with extraordinary intelligence, with mental and creative activity, or a person who has a strong talent in something. A personal with an extraordinary IQ, usually above 140 can also be considered a genius.

A savant is not a genius, and vice versa. A savant is not creative, while a genius is naturally creative. A genius can be created while a savant is innate with the skill.

http://www.blurtit.com/q214858.html

http://scientific-child-prodigy.blogspot.com/2007_06_03_archive.html

3. What is a stroke and how could it affect your mental functioning?

A stroke is a disease of the circulatory system caused by the rupturing or the blockage of an artery. A stroke can interfere with your mental performance, you will have problems thinking and remembering, it will change the way you feel or see things. Your feelings will also be altered.

http://www.womensheart.org/content/stroke/what_is_a_stroke.asp

http://brainfoundation.org.au/a-z-of-disorders/107-stroke#lifeafterstroke

4.What is a functional MRI and how does it help us understand brain activity?

Functional MRI stands for functional Magnetic Resonance Imaging; brain imaging technique that scans by measuring magnetic changes in the flow of blood to cells in the brain. The functional MRI will help analyze the anatomy of the brain and what parts are functioning when handling different aspects. It can also help identify bad things such as brain tumors and strokes.

http://www.radiologyinfo.org/en/info.cfm?pg=fmribrain

5. What is the corpus callosum and what role does it play in your brain's activity?

The corpus callosum is nerve fiber. It connects the left and the right hemispheres of the brain. One of its basic and more important functions is to communicate between the two hemispheres.

http://www.buzzle.com/articles/corpus-callosum-function.html

6. What is epilepsy and how might it affect your brain's abilities?

Epilepsy is the tendency to have recurrent seizures. It affects the nervous system and can affect your memory.

 http://www.epilepsy.com/101/ep101_epilepsy

7. What is autism?

Autism is developmental disability, a neurological disorder that affects your brain function and social skills.

http://www.medicalnewstoday.com/info/autism/

8. What is Asperger's Syndrome?

Asperger Syndrome is a neurobiological disorder that refers to developmental disabilities. People with this syndrome have a tough time communicating, interacting with others and show social awkwardness 

http://kidshealth.org/parent/medical/brain/asperger.html

http://www.autism.org.uk/about-autism/autism-and-asperger-syndrome-an-introduction/what-is-asperger-syndrome.aspx

pictures:

http://www.degreescout.com/wordpress/wp-content/uploads/2010/10/sv3.jpg

http://pegasus.cc.ucf.edu/~Brainmd1/brmodelc.gif

http://fc09.deviantart.net/fs34/f/2008/294/e/0/Socially_Awkward_by_Dumpysaurus.jpg