Tag Archives: BDNF

Lust for Answers

This past weekend, our group went to Provence, a province in southeast France, and visited the city of Arles where Vincent van Gogh lived for two years painting some of his most famous works such as Yellow House, Starry Night Over the Rhone, and Bedroom in Arles.

A map of some of the locations in Arles where van Gogh painted some of his most famous works.

Before going there, we saw in class the movie, Lust for Life, a 1950’s biographical movie about Vincent van Gogh’s life highlighting his interactions with other painters, his family, and his surroundings (Lust for Life – Trailer, n.d.). The movie touches on Van Gogh’s lifelong mental strife showing that while we revere him as an artistic genius now, very few people understood him including himself.

It seemed the depression that Van Gogh experienced subsided according to his letters to his family and friends, but in the movie, they show the manic way he painted constantly covered in paint and obsessed with catching the light to paint landscapes and field laborers. When the fall and winter came around, he could not go outside expressing how he felt trapped. His condition worsened where outside painting did not work anymore leading up to him to cut off his ear with a variety of possible reasons that no one could confirm. He eventually was admitted to a hospital where his hallucinations continued with blocks of time missing from his memory and his alcohol abuse addressed. He still continued to paint famous pieces such as The Courtyard of the Hospital at Arles 1889 that are preserved to this day.

A picture at the hospital courtyard where van Gogh was attempted to after cutting off his ear.

We looked at his doctor’s notes categorizing his condition as epilepsy because of his ongoing non-lucid episodes, so we started looking into different mental conditions that related back to the ones we know today as major depression disorder, bipolar disorder, schizophrenia, and more. This eventually led us to see what type of treatments would be available for the people with dementia praecox: a term coined by Emil Kraepelin to describe lesions in the cerebral cortex that mild dementia (Adityanjee et al., 1999). I couldn’t find much in terms of treatment, but it got me thinking about what we have today to help alleviate the effects of mental illnesses such as bipolar disorder, schizophrenia, and depression. As well as my interest being piqued through exploring Van Gogh’s life, there is a high probability I will see these novel practices implemented in the future.

The School of Nursing at Emory does a good job of teaching us the evidence-based practices that we follow for patient safety and comfort, but the patients have the autonomy in most cases to deny treatment, do something different than recommended to treat their ailments , or ask about new upcoming treatments. Because of this, it is important to know recent research about various types of treatment practices to be better support the patients.

van Gogh’s self portrait fading away during the Atelier des Lumieres of all of his works.

One that was really interesting to find out was the possible implementation of brain-derived neurotrophic factor (BDNF) to help treat neurodegenerative diseases as well as mental health disorders. It is a growth factor that is used in neurogenesis or the formation of new neurons which is not common for adults; in most of the brain, there are no new neurons created from the ones at birth, but there are some brain areas that still have new neurons created which is where growth factors like BDNF are used those new neurons (Bathina and Das, 2015). This is also used for synaptic plasticity in which there is a consistently strong or diminished communication between the neurons depending on how strength and importance of the signal is between the two neurons (“What Is Synaptic Plasticity?”). There is also evidence that a depleted amount of the class of factors BNDF belongs to can possibly be an indicator for neurological disorders such as Parkinson’s disorder and Alzheimer’s (Bathina and Das, 2015). While BNDF has the ability for synaptic plasticity, a study done with mice found that inhibition of one of the receptors BNDF can bind to shows a decrease in long term depressive behaviors without affecting its synaptic plasticity function in other brain areas (Woo et al., 2005). Researchers also theorize that people with reduced BDNF levels might have a decreased synaptic plasticity in the hippocampus which prevents the body from going back to homeostasis taking them out of their stress related depressive states (Phillips, 2017). The second type of receptors that BDNF does the opposite effect by producing synaptic plasticity; this receptors’ activation and an BDNF increase is seen in the presence of certain antidepressive pharmacologic therapies (Phillips, 2017).This is now being used as an indicator for future drug therapies as a measure of effectiveness.

A watercolor painting I did in class depicting the sensory neurons in the eye.

Going away from the pharmacological side, I started to think about Van Gogh and how his art was a source of peace and strife for him. At some point, painting couldn’t help in him in the way it did before. This is not to discredit the effects that art and other alternative therapies have on supporting those with symptoms similar to his; a study had 58 patients diagnosed with schizophrenia do art therapy twice a week for twelve weeks (Montag et al., 2014). They found that those who had committed to the program had less negative symptoms which include a loss of interest and a lower affect as well as less positive symptoms of schizophrenia such as auditory hallucinations compared to the control group who did not receive the art therapy (Montag et al., 2014)  (“Symptoms,” 2017). This support the idea that Van Gogh’s art was a therapeutic event for him up until everything became too much. It’s fascinating to how we reverie Van Gogh’s coping mechanism after his death with his few family and friends supporting his ability to paint. It makes you think about those that we have forgotten about who are tucked away in our society creating the next artistic masterpiece of our time.

 

 

References

Adityanjee, Aderibigbe, Y. A., Theodoridis, D., & Vieweg, W. V. R. (1999). Dementia praecox to schizophrenia: The first 100 years. Psychiatry and Clinical Neurosciences, 53(4), 437–448. https://doi.org/10.1046/j.1440-1819.1999.00584.x

Bathina, S., & Das, U. N. (2015). Brain-derived neurotrophic factor and its clinical implications. Archives of Medical Science: AMS, 11(6), 1164–1178. https://doi.org/10.5114/aoms.2015.56342

Lust for Life – Trailer. (n.d.). Lust for Life – Trailer. Retrieved from https://www.youtube.com/watch?v=WUHL0h_kQ6s

Montag, C., Haase, L., Seidel, D., Bayerl, M., Gallinat, J., Herrmann, U., & Dannecker, K. (2014). A Pilot RCT of Psychodynamic Group Art Therapy for Patients in Acute Psychotic Episodes: Feasibility, Impact on Symptoms and Mentalising Capacity. PLoS ONE, 9(11). https://doi.org/10.1371/journal.pone.0112348

Phillips, C. (2017). Brain-Derived Neurotrophic Factor, Depression, and Physical Activity: Making the Neuroplastic Connection. Neural Plasticity, 2017.https://doi.org/10.1155/2017/7260130

Symptoms. (2017, October 23). Retrieved June 10, 2019, from nhs.uk website: https://www.nhs.uk/conditions/schizophrenia/symptoms/

What is synaptic plasticity? (2016, November 22). Retrieved June 9, 2019, from https://qbi.uq.edu.au/brain-basics/brain/brain-physiology/what-synaptic-plasticity

Woo, N. H., Teng, H. K., Siao, C.-J., Chiaruttini, C., Pang, P. T., Milner, T. A., … Lu, B. (2005). Activation of p75NTR by proBDNF facilitates hippocampal long-term depression. Nature Neuroscience, 8(8), 1069–1077. https://doi.org/10.1038/nn1510

Picture #1: [Screenshot of the walking tour of Van Gogh’s art in Arles]. Retrieved from https://www.google.com/maps/d/u/0/viewer?mid=1014-AkOjbBzXEQQLcxz8NGxa10Oo1bGN

Picture #2 and #3: Taken by me

Picture #4: Painted and picture taken by me

Walking through Paris

Amongst the many changes I have experienced while in Paris, I noticed that I am walking considerably more than I usually do. While most people are aware of the positive impact walking and exercise can have on the body, I am dedicating this post to exploring the effects of exercise on the brain.

Thanks to my handy Fitbit (yes, I know I am a little obsessed), I am able to track my daily activity, so I have a very good idea about how much exercise I am getting. Between going to class, touring museums, and exploring getting lost in the streets of Paris, I am walking an average of over 8 miles every day. Paris is a very “walk-able” city, and my friends and I regularly opt to walk to our destinations instead of using the metro. I know that this must be affecting my cognitive ability, because even while operating on 4-6 hours of sleep every night, I am able to focus and work surprisingly well.

Fitbit evidence that 1) I am walking crazy amounts in Paris, and 2) I can justify eating multiple pastries a day*  *point 2 has not been scientifically proven

Fitbit evidence that 1) I am walking crazy amounts in Paris 2) I can justify eating multiple pastries a day*
*point 2 has not been scientifically proven

A recent study in college-aged females found that after only a single session of moderate exercise, participants showed increased brain activation during a working memory task (Li et al. 2014). Working memory is a limited brain resource that temporarily stores, processes and updates action-related thinking. It is utilized when you need to actively handle information, and your working memory capacity is an important measure of cognitive function. The researchers in this study used a modified N-back task to measure working memory. This task requires participants to attend to a sequence of stimuli, and determine if the current stimulus matches a stimulus that was “N” steps earlier in the sequence. The task gets more and more difficult as N increases, because it becomes harder to keep track of when a stimulus appeared.

A visual representation of the N-back task used in the study by Li et al. (2014)

A visual representation of the N-back task used in the study by Li et al. (2014)

To compare brain function, the subjects performed this task while in a functional magnetic resonance imaging (fMRI) machine, once following exercise, and once following a rest period. The fMRI measures blood oxygenation, which provides a visual image of brain activation. While there was no significant change in subject performance on the task, the data show more brain activation in the exercise condition, especially in the prefrontal cortex (PFC) and medial occipital cortex during the 2-back condition. The PFC is well recognized to be important for working memory, and the specific areas of the occipital lobe that changed are also involved in online processing. The lack of performance change limits the conclusions that can be drawn from this study, but it is reasonable for me to assume that my working memory capacity is positively influenced by the increased exercise I get in Paris. The researchers clearly showed that exercise influenced the brain areas important for working memory in subjects of my same age and sex, and this effect would likely be enhanced by an extended exercise routine like mine. A future study could explore the effect of chronic exercise, or use multiple behavioral measures to see if that leads to more pronounced changes in working memory performance.

Working memory is not the only brain function influenced by exercise. In fact, hundreds of studies explore how exercise can change the brain. One of the most common focus areas is how exercise increases brain-derived neurotropic factor (BDNF) in the hippocampus. BDNF is very important for brain plasticity, and the hippocampus is highly involved in learning and memory. One study found that exercise enhanced memory and cognition in rats, through the action of BDNF and the pathways it influences (Vaynman, et al. 2004). A different study focused on the non-neuronal cells in the brain, called glial cells (Brockett, et al. 2015). They found that running influenced synaptic plasticity in rats, producing widespread positive effects in both neurons and glial cells in areas associated with cognitive improvement. The last study looked at showed how exercise can help people’s mental health by reducing the stress hormone cortisol, through overall regulation of the hypothalamic-pituitary (HPA) axis (Zschucke et al. 2015).

I walked almost 10 miles before stumbling upon this set at Fete de la musique, and the journey was as fun as the event!

I walked almost 10 miles before stumbling upon this set at Fete de la musique, and the journey was as fun as the event!

It is so interesting to hypothesize about the different ways that my brain may be changing in response to something as simple as walking. Evidence suggests that my working memory capacity, brain plasticity, and mental health are all influenced by exercise. Now that I only have one week left to enjoy Paris, I will make sure to walk everywhere to experience, learn and improve my brain as much as possible. With all of the positive effects Paris seems to have, I know I will be planning a return trip the second I get home!

 

References 

Brockett AT, LaMarca EA, Gould E (2015). Physical Exercise Enhances Cognitive Flexibility as Well as Astrocytic and Synaptic Markers in the Medial Prefrontal Cortex. PLoS ONE. 10(5): e0124859.

Li L, Men W-W, Chang Y-K, Fan M-X, Ji L, & Wei GX, (2014). Acute Aerobic Exercise Increases Cortical Activity during Working Memory: A Functional MRI Study in Female College Students. PLoS ONE. 9(6): e99222.

Vaynman S, Ying Z, and Gomez-Pinilla F, (2004). Hippocampal BDNF mediates the efficacy of exercise on synaptic plasticity and cognition. European Journal of Neuroscience. 20: 2580–2590.

Zschyke E, Renneberg B, Dimeo F, Wüstenberg T, & Ströhle A (2015). The stress-buffering effect of acute exercise: Evidence for HPA axis negative feedback. Psychoneuroendocrinology. 51: 414-425.