Showing posts with label fantasy. Show all posts
Showing posts with label fantasy. Show all posts

Thursday, May 25, 2023

The Tomorrow River

 



The Tomorrow River is a small Wisconsin stream that crosses US Highway 10 three or four times between Fremont and Waupaca.  It eventually runs into a creek and becomes the Waupaca River.  I crossed all those tributaries twice on a trip last weekend. It gave me the usual opportunity to free associate to my past life. Two memories came immediately to mind – both from about 1977.  I was freshly out of the Peace Corps and trying to establish myself in a job as a research assistant cloning trees at an Institute in the area. That involved a lot of travel down Highway 51 to Highway 10 and I did not have a car.

One day I was travelling on a Greyhound bus heading to my apartment.  That was the first time I caught the Tomorrow River sign, as I looked up from a letter I was writing to my friend Glenn. I had a good experience in the Peace Corps entirely due to the Americans I met in my group.  They were bright, excitable, and energetic. We had gatherings where we listened to music, ate pizza, and played basketball.  We had long discussions into the night about what was important, what art meant, literature, music, math, science, and the meaning our work as high school teachers in the Peace Corps. We read the hipster literature of our time – Kerouac, Pirsig, Kesey, Brautigan, Wolfe, and others.  There were animated discussions and arguments.  All of that probably influenced the letter I was writing and then I saw the sign. The letter took on a surrealistic quality that Glenn appreciated in a letter he sent back to me.  As I visualized that decades old experience – it was a good feeling. I still feel a connection to my Peace Corps friends even though it has been decades and we rarely see one another or communicate.  I know that when I do – we will pick things up the way they have always been.

Between the second or third Tomorrow River sign there is an uphill curve in the road that bends to the left when you are traveling east. It is a long half mile bend. Later that same year just after Thanksgiving – I was getting a ride to my apartment from my friend Walt.  We went to the same high school and college. He was two years younger than me. Walt’s personality was completely the opposite of me. He was spontaneous, outgoing, and engaging. He could joke about anything.  I was the lab assistant in his organic chemistry section and one day his condenser hose broke loose and started spraying water just over the top of a freshly cut pile of sodium metal. I was able to grab the hose and redirect it.  Luckily there was no contact with the sodium, but after that point he started referring to himself and his lab partner as Captain Sodium.  On that day he was dropping me off and heading to his graduate program in endocrinology in Chicago.  The weather was not cooperating.  On that bend – the traffic that was usually travelling at 65-70 mph was at a dead stop in an ice storm and backed up for miles.  We both got out for a better view and realized it was impossible to stand on the road. Even  maintaining your balance, you eventually slid from the highest to the lowest part of the road and were forced to crawl back across the lane of oncoming traffic. We got back in the car and spent a long time joking about his bright reddish orange Dodge sports car and all of the trash talk he got from people in our home town about that car.  When he walked into a local bar he would hear: "Here comes the Fire Chief!"  We eventually completed the trip and I would see him from time to time over the next decades as he completed his PhD, then medical school, then residency in anesthesiology.  He became one of the top anesthesiologists in the country. And then several years ago, I got the news that he had died suddenly after a brief illness.  He was at the top of his game at the time – a department head and national expert in neurosurgical anesthesia.  I felt badly about not seeing him and not congratulating him on all of his success. I always feel badly when people don’t make it to retirement and a lot worse if I know them.  

Even before I went into the Peace Corps, I spent a lot of time navigating these roads with my friend Al.  We did that mostly in a 20-year-old Volkswagen beetle with a defective gasoline heater. When you tried to turn the heater on it might blow the hood open. Al was a mathematical genius and had accumulated almost enough math credits for a major when he was in high school - all self-taught by reading the texts. He decided to go to medical school and that led him to spend an additional 2 years as an undergrad taking the prerequisite courses.  Somewhere along the line driven by my insomnia and his sense of adventure, we ended up driving long distances to other towns at night to see movies or bands that we knew would never come farther north to our college town.  When you drive on roads in Wisconsin, Minnesota, and Michigan unusual things can happen.  When the pitch-black night is underlit by the snow cover – anything can happen. One night at about 2 AM we were on a road running parallel to Hwy 51 north when suddenly – an old model Chevrolet was airborne about 50 feet in front of us.  By airborne I mean it crashed over the top of a 5- or 6-foot snowbank at a high rate of speed and crossed our highway in a perpendicular path.   It landed on the other side of the road clipping the top of that snowbank first.  Turning around it was obvious that this was a planned attempt to launch the car from a parking lot outside of a bar to the other side of the road.  A few seconds later would have resulted in our Volkswagen being T-boned. That night we were able to turn up the radio and keep going.

These are the kinds of associations I have when I am driving these roads.  The paragraphs seem flat compared to the images in my head. I can envision my friends, our youth, images of what happened, the associated emotions, and the thoughts I have stacked on these events over the past 40-50 years. People I knew then often in a casual way.  People who I wanted to know better. People who – if I had interacted with them differently – would have drastically altered the course of my life and the people who did alter the course of my life. People who I wish would call me or send me an email.  People who I regularly think about and dream about.  But then I tell myself – “This is your own weird perspective on life – most people don’t think like this.”  Generally, that is good to know but at the same time – people do reach out from the past. They seem to realize that we are not the same people we used to be – but the common experience means something.  In many cases, it means a lot.  At my 50th high school reunion, I was sitting outside of the main room when a classmate approached me and asked if she could sit down. I have known her for over 50 years and yet, that conversation was the longest I had ever spoken with her. It was longer than all of the conversations I ever had with her combined.  It was probably the best experience of the reunion.

I should probably clarify that I have no regrets and consider myself to be very fortunate.  All of these thoughts about the past don't cause regret - but there is often that feeling that you get when you go back to your home town for the first time. You see things in a different light.  You realize that you can't go back to the way things used to be. These thoughts have continuity with the present and the future.

At some point in the drive, I do a memory check.  I use the autobiographical memory test format and think of famous movie stars, visualize their image, and try to match names.  So far – so good.

I fantasize - primarily generative fantasies. I first encountered that term in the writings of the late Ethel Persons, MD.  She was an American psychoanalyst I found when I started to research fantasies in the 1990s.  She seemed to be one of the few psychiatrists writing about it. Generative fantasies are primarily problem solving fantasies that are more stimulating than coming up with lists in your head or your software. As I type that I am reminded of another road trip (east of Duluth on Hwy 2) when my wife asked me: "Do you ever have fantasies?' I told her I was fantasizing right at that time and she was very interested in the content. "I was thinking about what it would be like to win the men's 500M in the Olympics." She knew immediately that I was thinking about speedskating. I took up speedskating during residency and got quite good at it in my 40s. I was never an elite speedskater by any means, but I had the movements down, could endure the pain, and skated a lot of laps.  Part of learning the movement had to do with fantasies and thinking about the skaters I was seeing in the Olympics and racing against and remembering any advice I had received. I always have plenty of these thought patterns that seem focused on a hypothetical future.

 As a student of consciousness, I always wonder about how all of these thoughts are generated and (as a psychiatrist) what they might mean. Twenty years ago, I did a presentation on what I called the bus theory of the human brain. In computers, a bus is any system that connects components and allows data transfer between those components.  I decided that there was not enough emphasis on white matter and studied those tracts, their fiber content, and tried to calculate the bandwidth of those fiber tracts. At about the same time, I was wrapping up a course that I taught for many years on dementia diagnosis and cortical localization that was more of a behavioral neurology approach to the problem.  I tried to think of all of the recent papers I had pulled on hippocampal connectivity and recent papers on the neurochemistry of the hippocampus.  I thought about a paper I recently read on entropy and consciousness and whether thermodynamics could be a granular explanation for conscious states.  I am still a skeptic.

My wife wakes up.  We are driving home from her high school class reunion. There is a significant celebrity in her class and he sent a video when he could not make the reunion. The audio-visual equipment did not work, but we could see his projected image. We start to talk about the events of the night and what some of them might mean.  We talk about the A-V problems and the celebrity who clearly has become a projective test for everyone in her class. We talk about how good it will be to get back home and what we will need to do to reestablish the routine.

Thinking is a big part of life for me and life is very good…..

 

George Dawson, MD, DFAPA  

 

Photo credit for this one goes to my wife.  That is a Tomorrow River sign shot alongside Highway 10 last weekend.


References:

1:  Osanai H, Nair IR, Kitamura T. Dissecting cell-type-specific pathways in medial entorhinal cortical-hippocampal network for episodic memory. J Neurochem. 2023 May 30. doi: 10.1111/jnc.15850. Epub ahead of print. PMID: 37248771.


Saturday, October 22, 2016

Coffee Shop Neuroscience




I went into my favorite coffee shop the other day for my usual mocha.  They typically post a trivia question of the day that gives you a 10 cent discount on the coffee.  After a conference with a recent focus on neuroscience it was interesting to see a question about the number of thoughts per day.  My wife ventured a guess.  I asked the barista for the source and all that she could tell me was: "We get it off the Internet like most of our questions."  No footnote or reference available.  The source was not difficult to find.  It was a typical Internet site that has never impressed me as a knowledge source, but it did have a link to the original paper.  It turns out to be a neuroscience site - The Laboratory of Neuroimaging (LONI) at UCLA.  Read the fine print at the bottom of this page for qualifiers on what counts as a thought.  I looked for any papers on this estimate on the web site as well as Medline and did not come up with anything.

Irrespective of the methodology the question poses interesting questions for clinical psychiatrists if they are comfortable outside the confines of the DSM.  How much attention is being paid the the baseline conscious state of the patient and why might that be important?  What is their stream of consciousness every day?  Is it disrupted by mental illness or addiction?  To what extent is that stream of consciousness broken up into daydreams, memories, and fantasies?  To what extent is it impacted by a process that is not even suggested by the DSM?  The best example that I can think of is boredom.  Being easily bored can be a diagnostic criterion, but it seems to be an uneasy mental state on its own.  People who are bored get driven to do things to alleviate boredom and sometimes those activities are very risky.  Are the thoughts mentioned in the coffee shop question memories, fantasies, or daydreams? Why the large number?  I am not aware of brief frequent thoughts.  My stream of conscious thought is comprised of more coherent stories or images.

I did a Grand Rounds on fantasy and daydreaming about 15 years ago.  There has never been much quantitative work on fantasy.  There were some new research approaches to daydreaming being used at the time and I incorporated some of those references into the presentation.  I don't recall the exact number of daydreams per day but they were considerably less than 100.  The only research approximating the numbers of thoughts per day may be the research on the exact number of spoken words per day.  This research has generally been a comparison between men and women and a test of which sex speaks the most words.  Those numbers across different cultures and sampling periods range from 12,867 to 24,051 words per day (5).  Standard deviation were large and the authors conclude that on the average both sexes spoke about 16,000 words per day.  To me speech and language is unconsciously processed thought, but even counting all of those words does not get us to the level of the coffee shop question.  Do the authors believe that they have a way to capture tens of thousands of unconsciously processed thoughts?  I am very interested in hearing how they arrive at these figures.

The research in this area has since moved into the area of the wandering mind.  Wandering mind is defined as a cognitive focus on information unrelated to the immediate sensory input or task on hand.   It would include daydreams, fantasies, and the typical stream of consciousness that every person experiences at times throughout the day.  The critical research questions include when is mindwandering adaptive as is the case of generative fantasies and when it is maladaptive?  Smallwood, et al (7) have written an excellent brief review of how mindwandering can negatively impact medical decision making and the cognitive performance of physicians.  They point out that fatigue, depression, and circadian rhythm disturbances can lead to increased mindwadering with negative consequences by decoupling attention to the external environment from the necessary memories, patterns and access to decision-making that are the physician's cognitive set.      
    
The question also involves neuroscience.  Is there a physical representation of this process in the brain and what is it?  Neuroscience tells us that the brain has a Default Mode Network (DMN).  It was initially noted to be a network of brain regions that remain active during functional brain imaging studies in the absence of an external task.  These studies typically involve an active task for the research subject and the resulting brain image is analyzed as a response to that stimulus.  It was determined that this DMN comprises the system that allows for internal dialogue and stimulus-independent thought.  The physical representation includes a primary system comprised of the anterior medial prefrontal cortex (aMPFC) and the medial posterior cingulate cortex (PCC) communicating with two subsystems.  The medial temporal lobe subsystem is comprised by the retrosplenial cortex (RSP), parahippocampal cortex (PHC), hippocampal formation (HF), the ventral medial prefrontal cortex (vmPFC), and the posterior inferior parietal lobule (pIPL).  The dorsal medical prefrontal cortex subsystem is comprised of the temporal pole (TempP), the lateral temporal cortex (LTC), the temporoparietal junction (TPJ), and the dorsal medial prefrontal cortex) (1).  Some groups differ on the physical representation of this system and some groups use Brodmann area designations.  I drew a slightly different model based on Sporn's text (6) with some obvious distortion due to the lack of a three dimensional representation (the rTC should be folded over to the right temporal area away for the medial view):



Subsequent research has shown that the DMN may be implicated in several psychiatric disorders (2). Several functions for the DMN have been proposed that cut across a number of disorders including mind-wandering when no specific external stimulus is present, memory consolidation, to possibly maintain a baseline level of arousal, to divide attention across tasks and for continuity across time (3).  Disruptions and functional disconnects to the DMN have been studied for a number of psychiatric disorders.  If the conceptualization is correct it is useful to think about the implications of functional or anatomic disconnects or hyperconnects to other systems.

How is all of this relevant to psychiatry?  Consider the case of two patients with severe depression.  They both have insomnia, anhedonia and decreased appetite.  They both have typical depressogenic thought patterns including abundant self criticism, hopelessness, and suicidal thoughts without intent to harm themselves.  The only difference is that one of these patients has intense rumination about a job loss.  This patient was downsized along with 50 other people.  The job loss was a straight business decision rather than any performance deficiency.  The patient without rumination is treated with standard methods and recovers.  The patient with intense rumination does not.  The depression and rumination persists despite multiple antidepressant trials.  The degree of disability persists.  There is not much guidance about how to treat this person from a biological standpoint.  It comes down to empirical drug trials and additional treatment for what has been considered anxiety, psychosis, or possible obsessive compulsive disorder.  I have seen these patients recover with detoxification from drugs or alcohol, treatment with antipsychotics, treatment with electroconvulsive therapy, but not treatment with benzodiazepines.  Will the cognitive neuroscience that incorporates models of the wandering mind and default mode network offer fast and more effective treatments?  I think that we may already be seeing that.  Mayberg's classic 2005 article (8) explicitly testing the network hypotheses about treatment resistant depression with deep brain stimulation was a start.  That literature has greatly expanded since that point.

There has been an explosion of network based theories of both psychopathology and normal conscious thought in the past decade.  These models are increasingly relevant as psychiatry is dragged out of a receptor and reuptake protein based discipline, where the practitioners may have a vague idea of where those receptors are located and what they really might be doing.  It was a necessary second step, but only neuroscience will get us to better models and models that we can apply to the treatment of unique individuals.  Psychiatrists have a critical decision to make at this point.  Are we going to remain stuck in a diagnostic and treatment paradigm that clearly applies to a minority of the people with mental illness or are we going to embrace the science that will both allow us to treat everyone better and give us a more complete understanding of human consciousness?

Learning about the Default Mode Network is a good starting point.  


George Dawson, MD, DFAPA



References:

1;  Barron, DS, Yarnell S.  Default Mode Network: the basics for psychiatrists.  Fundamentals of neuroscience in psychiatry.  National Neuroscience Curriculum Initiative.


2:  Mohan A, Roberto AJ, Mohan A, Lorenzo A, Jones K, Carney MJ, Liogier-Weyback
L, Hwang S, Lapidus KA. The Significance of the Default Mode Network (DMN) in
Neurological and Neuropsychiatric Disorders: A Review. Yale J Biol Med. 2016 Mar 
24;89(1):49-57. eCollection 2016 Mar. Review. PubMed PMID: 27505016; PubMed
Central PMCID: PMC4797836

3: Mason MF, Norton MI, Van Horn JD, Wegner DM, Grafton ST, Macrae CN. Wandering minds: the default network and stimulus-independent thought. Science. 2007 Jan 19;315(5810):393-5. PubMed PMID: 17234951; PubMed Central PMCID: PMC1821121.

4: Stafford JM, Jarrett BR, Miranda-Dominguez O, Mills BD, Cain N, Mihalas S,Lahvis GP, Lattal KM, Mitchell SH, David SV, Fryer JD, Nigg JT, Fair DA. Large-scale topology and the default mode network in the mouse connectome. Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):18745-50. doi: 10.1073/pnas.1404346111. Epub 2014 Dec 15. PubMed PMID: 25512496

5: Mehl MR, Vazire S, Ramírez-Esparza N, Slatcher RB, Pennebaker JW. Are women really more talkative than men? Science. 2007 Jul 6;317(5834):82. PubMed PMID:17615349.

6: Olaf Sporns.  Networks of the Brain.  MIT Press.  Cambridge, Massachusetts, 2011.

7: Smallwood J, Mrazek MD, Schooler JW. Medicine for the wandering mind: mindwandering in medical practice. Med Educ. 2011 Nov;45(11):1072-80. doi: 10.1111/j.1365-2923.2011.04074.x. PubMed PMID: 21988623. (link to free full text).

8: Mayberg HS, Lozano AM, Voon V, McNeely HE, Seminowicz D, Hamani C, Schwalb JM,Kennedy SH. Deep brain stimulation for treatment-resistant depression. Neuron. 2005 Mar 3;45(5):651-60. PubMed PMID: 15748841.

9: Christoff K, Irving ZC, Fox KC, Spreng RN, Andrews-Hanna JR. Mind-wandering asspontaneous thought: a dynamic framework. Nat Rev Neurosci. 2016 Nov;17(11):718-731. doi: 10.1038/nrn.2016.113. PubMed PMID: 27654862


Supplementary 1:

Olaf Sporn's book Networks of the Brain is an excellent resource to study this topic and to try to catch up on a decade of research:







Supplementary 2:

Default Mode Network links that are relevant for psychiatrists (unedited):

"default mode network" dementia

"default mode network" addiction

"default mode network" "bipolar disorder"

"default mode network" schizophrenia"

"default mode network" ADHD 

"default mode network" depression

"default mode network" anxiety

"default mode network" mind-wandering

"default mode network" day dreaming


Supplementary 3:

The answer to the coffee shop question is a.




Monday, April 15, 2013

Penis Size and the Primitive State of Sexual Consciousness

On the Nature blog this week, there was a summary of an article originally posted in Proceedings of the National Academy of Sciences (PNAS) on the implications of penis size preference and evolutionary pressure for large penises.  If true that may explain why humans have the largest penis size of all primates.  Someone has apparently already figured out that male genitalia were the earliest developed physical traits in the animal kingdom.

In the experiment, researchers showed computer generated life sized projections of 53 frontal images of men of varying heights, flaccid penis size, and body type to a group of 105 heterosexual Australian women.  The women looked at the images and rated them for sexual attractiveness.   Since the original article is not accessible, the results on the Nature blog state that that a range of flaccid penis sizes and male body types were rated the most attractive.  At some point masculine body type (greater shoulder width to hip width) was more important.  There was not a direct correlation with penis size and attractiveness.  The graph of size versus attractiveness was described as an inverted U-shaped curve with attractiveness falling off at both extremes.  There were some remarks on the importance of this finding not the least of which that studies like this may make it easier to talk about an “uncomfortable subject”.  I doubt that the press will take such a nuanced approached.

As I read that last line, I thought about penis references in the popular culture over the course of my lifetime from Woody Allen films to Seinfeld episodes to morning radio shock jocks.  I have gone through the “sexual revolution” and noticed that very little has changed.  If anything the landscape seems to have shifted to a more male dominated perspective with the further objectification of women and much easier access to that content.  In some of that content there is a disturbing portrayal of serial violence (usually homicide) and sadomasochism even in prime time television.  All it takes is showing an MALSV (mature audiences, strong language, sexual situations, violence) disclaimer at the outset to broadcast a blend of sexual violence and gratuitous nudity.  The focus from business interests is producing as much of this content as possible combined with the legitimization of the pornography industry.  What is driving all of this?

There are two areas relevant to psychiatry that are the object of very little research and they are sex addiction and sexual consciousness.  Consciousness in general has not been much of a focus by psychiatry since the advent of DSM atheoretical descriptors that in effect limited the focus of study to extremes of human behavior.   The consciousness that I am referring to is the unique conscious state of individuals.  The current diagnostic system does not presume to diagnose individuals

Sexual addiction and other "behavioral addictions" like eating and gambling are all the rage right now.  The neurobiological theories of reward, initial impulse control involving positive positive reinforcement, and subsequent compulsive behavior based on negative reinforcement are thought to apply in traditional chemical addictions but can the same models apply to sexual behavior?  The problem is that there are vast uncharted areas connected to the midbrain and basal forebrain structures that are thought to be substrates for addictive behavior.  Not all of the details of neurotransmission within the system are known even though we have several cartoon versions.  An analysis from reference 3  suggests in a rat model of sucrose self administration that up to 28 regulatory proteins in various cell structures may form the basis for the signaling involved.  Despite several papers suggesting that behavioral and chemical addictions may have the same substrates, I have not seen any compelling evidence that this might be true.  If sex can be addicting, what are the risks of exposure and can we help people with serious problems involving their sexual behavior? 

The state of consciousness in psychiatry these days is at an all time low.  Biological reductionism and a poor understanding of the importance of modern psychoanalysis in exploring unique conscious states may be part of the problem.  The other part of the problem is a single minded focus on problems with human behavior that are clearly two standard deviations from the norm.  This basically leaves out the unique conscious state of the individual and the fact that many people are clearly affected by problems that can't be reduced to a psychopathological model.  Human sexual behavior and all of the behaviors it is associated with are excellent examples at both an individual and cultural level.   Those authors who have taken on this task; most notably the late Ethel Person, MD have described a continuum of male sexual fantasy and behavior from the perspective of psychoanalytic theory and treatment of associated problems.   One of the more interesting considerations to me is the omission of practically all considerations of fantasy and daydreaming in the DSM as if these important functions have no explanation and are not as grounded in prefrontal cortex as the working memory is.  Do we know the basic differences in the sexual consciousness of men and women?  Not from anything that I can find.

These considerations are as important for culture as they are for psychiatry and psychiatric research.  The current cultural attitude seems to be that we need a mechanical understanding of sex.  It is the mechanical approach that is presented as sex education in school.  Here are the parts, here is how they work, here is how you get pregnant, and here is how you get diseases.  No relevant discussion about associated emotions, human attachment, desire, or love.  No appreciation of scientific differences in the sexes.  No discussion about how the really big organ in the head is orchestrating everything.  Figuring out how to address these important issues is a lot more complicated than voting on the most attractive present day penis. 


George Dawson, MD, DFAPA

1.  Nuzzo R.  Bigger not always better for penis size.  Nature News April 8, 2013.

2.  Mautz BS, Wong BBM, Peters RA, Jennions MD. Penis size interacts with body shape and height to influence male attractiveness.  Proc. Natl Acad. Sci. USA http://www.pnas.org/cgi/doi/10.1073/pnas.1219361110 (2013). 

3.  Van den Oever MC, Spijker S, Li KW, Jiménez CR, et al. A Proteomics Approach to Identify Long-Term Molecular Changes in Rat Medial Prefrontal Cortex Resulting from Sucrose Self-Administration.  Journal of Proteome Research 2006 5 (1), 147-154

4.  Ethel Spector Person, MD.  The Sexual Century.  Yale University Press, New Haven, 1999.