Unit 6 Review

In this unit we went over the nervous system, senses, and brain.
Senses allow us to experience the world in many different ways. The way this works is the different receptors in different areas relay the information through a nerve to the brain. This is called sensation. Once it reaches and is processed by the brain it sends signals in response to the stimulus. This is called perception. Pain, hearing, sight, touch, smell, taste, sight, temperature, balance,  pressure and limb perception are all different types of senses that allow us to experience the world how we do. When one of these senses do not communicate to the brain. When this signal becomes interrupted in the brain sometimes the brain can rewire itself to regain some of the sense back. With medical treatment the brain can make new connections to experience the same sense in different ways. This concept of changing is called brain plasticity.  The homunculus is a diagram of the relative proportions of the different areas of the body and how many touch receptors they have on it; the lips and fingers have a high density of touch receptors.
Many things can go wrong in the nervous system. In the CNS most of the disorders lead to major life impacts. These can lead to a shortened and severely altered lifestyle. In the PNS diseases, they are often centrally located and do not have as big of an impact on the person's life. Addiction is a disease when the person becomes dependent on a substance and their neurons start relying on it in the neurotransmitters. The person eventually becomes out of control over whether or not they use.
I want to look more into neurotransmitters and how that impacts who we are.

The brain can change and mold to our environments.

 Pain is thought to be negative, but this is what happens without pain. Pain is used as an evolutionary advantage to prevent us from getting hurt. 

My new year's goals were to run and stay organized. I have been keeping up with the running and walking daily, but I have not stayed organized. All except 2 notes I wrote R&R for immediately. I needed to glue in the notes faster. This next unit I just hope to do the homework on time.