Tag Archives: neurology

Peanut Butter Sniff Test

image source: wikipedia commons

According to the statistics of Alzheimer’s Society BC, approximately 70,000 British Columbians are suffering from Alzheimer’s or any brain-related disorder. What is Alzheimer’s? It is a neurological disorder affecting the cognitive ability (e.g. memory and thinking) and behaviour of an individual, and it worsens over time. The physiological cause of Alzheimer’s is the increase in the number of twisted fibers of protein within the brain cells and plaques between cells.

image source: flickr

 There is no cure for Alzheimer’s; therefore, prevention and early detection are vital. Assessments  of a patient suspected of having the disease includes physical and mental examination (e.g. MRI, or more generally speaking, a brain scan). The downside of a brain scan is the strenuous process of monitoring the patient and being on the waitlist, which takes months, leading up to the scan; however, there is a test still under study that could detect if an individual suffers from Alzheimer’s – it is called the PEANUT BUTTER SNIFF TEST. This test could be an alternative to brain scans. Also, this could allow for early detection of the disease, so preventative steps can be taken early.

Jennifer Stamps, a graduate student, and her colleagues from University of Florida used peanut butter to conduct an olfactory test ( article about the scientific research).

YouTube Preview Image

Her group of researchers found that Alzheimer’s-affected patients had a decrease in smell sensitivity in the left nostril. David Knopman of Mayo Clinic, quoted by Singh, stated that “The idea that smell is altered in Alzheimer’s disease dementia patients is well known, and this is nothing new.” As mentioned above,  there is no cure for Alzheimer’s and the only treatment available is prevention.  Early detection of the disease leads to taking a more aggressive approach to alleviate the symptoms. The peanut butter sniff test could already be a clinical procedure used as a preventative measure for Alzheimer’s; however it is not very accurate because there are compounding variables such as: “congestion in your nasal cavities that can reduce your smell on a temporary basis, a past head trauma, severe past sinus infections”, according to Bartzokis, quoted by Oransky.

There are numerous arguments  made by other Alzheimer’s researchers against this study; however it is only at the beginning stages and Stamps is going to conduct more experiments to further develop her research.  She also gave a warning: “Don’t try this at home. Having slight differences between your left and right nostrils is normal, and you might end up freaking out over nothing.” In other words, for now just enjoy your peanut butter on a piece of toast.

-Ziharrphil Magnaye

References:

Alzheimer’s Society BC, Alzheimer’s Association, Alzheimer’s Society UK, Journal of the Neurological Sciences, Shots,  MedPage Today

Imagination: Where Does It Come From?

Image Source: http://www.flickr.com/photos/8773000@N08/6194675843/

You have probably seen this image on the left before. You might even have taken a personality test that identify you as a “logical left brainer” or a “creative right brainer”. Well, throw all those out the window because science has found a breakthrough in finding the origin of imagination.

 

As one of the oldest scientific myths,  people have identified themselves with the terms left-brained and right-brained with an assumption that some people use a particular side of brain more. Oh, you are logical and well-structured? You must be a left-brainer. Oh, you are creative and full of imagination? You must use your right brain a lot!

Through an extensive two year study, University of Utah researchers have completely busted this myth with identifying the specific networks in our  brain that process lateralized functions. We define lateralization as one hemisphere of the brain being more specialized in certain mental functions than the other. Based on the scanning images of 1,011 people’s resting brain, researchers studied functional lateralization in thousands of brain regions. They found that no individuals use their left brain network nor right brain network more as default.

For more information, this following Youtube video summarizes it perfectly.YouTube Preview Image

While these Utah scientists thoroughly proved that there is not left brain or right brain dominance in regards to creativity or logic, the origin of imagination is still unclear. The team who solved this mystery are the researchers from Dartmouth. They hooked the study participants up to fMRI and asked them to complete creativity related tasks, such as arranging shapes into complex patterns. The following is the fMRI image produced.

Image Source:
http://images.sciencedaily.com/2013/09/130916162003.jpg

 A wide variety of neurons are activated to complete these tasks, but  as you can see,  the eleven highlighted regions of the brain distinctively made a clear “mental network” to generate imagination.

These eleven areas of the brain ARE the origin of imagination.

You may ask  that why is imagination important ? Spongbob here proves the point.

Image Source:
https://farm8.staticflickr.com/7090/7394675658_2a5d9b848f_n.jpg

References:

Researchers Debunk Myth of “Right-brain” and “Left-brain”Personality Traits

How and Where Imagination Occurs in Human Brains

-Nick Hsieh