6 Fascinating Things to Understand About the Mind (and PTSD)

by Kassandra Lamb

I started out today with the goal of writing about Post-Traumatic Stress Disorder. Then I realized I needed to start elsewhere, with a bit of an explanation of how the human mind really works. So this is Part 1 of a two (maybe three) part series on the mind and PTSD.


Sigmund Freud (public domain)

Sigmund Freud introduced the concepts of the conscious mind and the unconscious mind in the early 1900s. His theory was quite controversial in its day and for quite a few decades afterwards. But a century after its introduction, most of us accept that there is stuff going on in our brains that we’re not currently aware of consciously.

But what exactly are these things called a conscious or unconscious mind (or the term often used by lay people–the subconscious mind)?

They aren’t really things at all. These aren’t actual places in the physical brain. There is no barrier somewhere in there that separates what is conscious from what is unconscious. Indeed, information flows back and forth between the two states of awareness all the time.

Here are six pieces of information one needs to know to understand the workings of our conscious/unconscious minds. I find them fascinating and hope that you do too.

NUMBER 1: Limited Time and Space
What we think of as our conscious minds, memory experts would call our working memories. Whatever one is thinking about at any given moment is in his/her working memory.

brain scan of working memory at work

The active parts of the brain during working memory tasks. (public domain)

Unfortunately, working memory is a pretty small space. There’s only room for about five to nine “chunks” of information at any given time. And unless one is actively focused on/thinking about a particular piece of info, it will drop out of working memory in about ten seconds or so.

Makes you wonder how we humans ever accomplish anything intellectual, doesn’t it?

NUMBER 2: Attention
If we pay attention to something, we can hold it in working memory (aka our conscious awareness) much longer. And if we are not focused on something (some verbal thought, piece of information, feeling, mental image, etc.), it will fade into the background (i.e., slide back into the unconscious mind), crowded out of working memory by whatever we are paying attention to at that moment.

Most information stored in our brains is available to our conscious minds IF the right memory cue comes along to bring it to the surface. But some things can get buried pretty deep in the unconscious, either due to lack of attention for a long time or to active pushing aside by our defenses (more on this next week).

Have you ever had the experience of something triggering a very old memory and you think, Gee, I haven’t thought about that in years?

NUMBER 3: Connections
The third thing to understand is that our minds automatically make a lot of connections between various things. This is called conditioned learning.

Ivan Pavlov

Personally, I think Ivan’s a lot cuter than Sigmund. (public domain)

Anyone who’s ever taken a psychology class has heard about Ivan Pavlov, the Russian physiologist who first had the Eureka moment regarding conditioning. He was studying the rate of salivation in dogs when presented with food, but after a while, he noticed that the dogs in his lab were salivating before the food was presented. They’d start slobbering in response to the sight of the equipment used to measure their drool, or to the lab attendant’s footsteps coming to get them out of their cages.

The dogs’ brains had learned to associate these other sights and sounds with the fact that they were about to be fed. And a biological phenomenon over which the dogs had no conscious control, salivating, occurred whenever they experienced these cues.

It’s imperative to our survival and sanity that our brains make all these little connections. They make life so much easier.

A moment ago, I scratched my hand without thinking about it. I hadn’t even noticed consciously that the hand had an itch until I was scratching it. And even then I might not have noticed if I hadn’t been casting about for an example of unconscious connections.

Without these learned associations, I wouldn’t have automatically scratched that little itch. The itch would have had to build until it was so annoying that I became consciously aware of it. Then I would have to stop and think and ask myself what has helped make something stop itching in the past. Oh yes, scratching the itchy spot usually helps.

Humans would have long since died off if they had to give that much conscious thought to every little need. There would be no time nor space in their working memories to solve problems or invent things.

NUMBER 4: The Form Our Thoughts Take
Neural impulses are firing in various parts of our brains all the time, but once we develop a fair amount of active language (usually by age 4 or 5), we tend to be most aware of our verbal thoughts. In other words, we consciously think in language most of the time.

Visual images also play a role. We may consciously call up an internal vision of something that happened in the past, or of a place we’re planning to go.

This morning, I accidentally drove past the post office, where I had planned to mail some letters. No problem, I thought as I visualized the big blue mailbox in front of my grocery store. I can mail them at the store. (My next errand.)

wedding day

I can recall being hot but I can’t feel it again consciously.

Memories of other things we’ve sensed may come into our conscious awareness as well, but most likely those thoughts will be verbal. When I think about my wedding day, during one of the hottest Augusts in Maryland’s history, I remember that it was hot. But I don’t actually feel that heat again. Likewise, I can recall that I felt both scared and excited that day. But I’m thinking about those feelings, not actually re-experiencing them.

The visceral sensations associated with memories and previous feelings are not all that accessible via our conscious minds.

Which brings us to…

NUMBER 5: Where Things Are Stored
First, let me point out that information tends to be stored in the part of the brain where it was first processed (or later, where it was re-processed; more on this next time). There’s a long biological explanation for that, which I think we’ll skip. Please just take my word for this little tidbit.

There’s a lot of stuff constantly being processed and stored in various parts of our brains, but to keep this simple I’m going to focus on the functions of three parts of the brain.

For most people (all right-handed ones and some left-handed ones), language functions occur in the left hemisphere of the cerebral cortex. (The cerebral cortex is the outer layer and the highest level of the brain, where actual rational thinking occurs, among other things.)

The cerebral cortex hard at work.

The cerebral cortex hard at work.

Visual perception (i.e., the processing of what we see) and sound modulation processing (i.e., tone of voice, etc.) occur mostly in the right hemisphere.

So if someone says, “Now don’t you look lovely tonight, my dear,” in a mildly sarcastic voice with a slight sneer on their face, your left hemisphere processes the words themselves. But your right hemisphere sends out a “snark alert” after interpreting the body language and tone.

But here’s the thing–sometimes those interpretations of visual and auditory info don’t make it into the conscious mind, because that information is being processed in the right hemisphere and we are more prone to be aware of our verbal left hemisphere’s thoughts. If at that moment when the subtly snarky comment is being processed, we’re thinking, “Gee, I’m glad I wore this outfit tonight,” that thought may crowd the interpretation of the body language and tone of voice out of conscious awareness.

But they’ve still registered in the right hemisphere. That part of our brain knows we’ve just been dissed, even if our conscious mind is oblivious. (And the memory of that event is mostly stored in the right hemisphere–the images, tone of voice, etc.)

Okay, let’s look at where emotions tend to be processed and stored. Research indicates that our positive emotions–joy, pride, anticipation–tend to be processed mostly in the left hemisphere, while the negative ones–fear, anger, disappointment, sadness–are mostly in the right hemisphere.

Do you see where this is going? You walk away from that person assuming you’ve been complimented when in reality you’re feeling hurt and belittled, and you don’t even know you’re having those feelings, because none of that ever made it into conscious awareness. So you end up being in a bad mood or maybe you pick a fight with your mate, accusing him or her of never appreciating how you look.

And you’re totally oblivious to the fact that your mood and behavior have been affected by the jerk with a smirk on his face.

revolving brain

The two hemispheres of the brain color-coded as red; the cerebellum as beige (animated image by Database Center for Life Science CC-BY-SA-2.1-Japan, Wikimedia Commons)

This brings us to one more part of the brain that is important to understanding the conscious vs. unconscious mind. The cerebellum is a section of the brain at the lower back part of your head. It is not part of the cerebral cortex, so it is completely outside of conscious awareness and pretty much beyond the reach of logical thought processes.

Research indicates that all those learned associations I mentioned earlier are stored in the cerebellum. So they operate outside of conscious awareness.

Which brings us to the part of this that relates to PTSD.

NUMBER 6: Memories, Old Associations and Feelings Can Be Triggered Without Our Conscious Awareness
Let’s go back to the jerk with a smirk for a moment. I didn’t make that example up. That really happened to me. The host of a professional gathering met me at the door with that greeting.

My conscious mind (left hemisphere) was preening at the compliment but unconsciously, my right hemisphere picked up on the implied slam that I usually looked like crap.

As the evening progressed, I found myself feeling more and more insecure and self-conscious–not a normal reaction for me. I’m pretty secure in my ability to get along with people and be well-liked. But that evening, I found myself stumbling in conversations and even becoming physically clumsy.


For some reason, looking in the mirror often helps me connect with my unconscious mind (photo by Surii, CC-BY 3.0 Wikimedia Commons)

I finally took myself off to the ladies’ room to have a little chat with myself. Looking in the mirror, I thought, “What’s wrong with me? I haven’t felt this awkward since middle school.”

Sometimes when you ask your unconscious mind a direct question, it gives a direct answer, if you’re paying attention. I immediately flashed to a mental image of that scene at the door. Only this time I heard the tone and saw the sneer on a conscious level.

A little background info here. I was what my mother politely called a “late bloomer,” and my classmates in middle school, being the delightfully civilized creatures that they were, teased me unmercifully about my nonexistent figure and overall gawky appearance.

The host’s tone and sneer had triggered an association (via my cerebellum) to those middle school memories and the self-conscious feelings from that time in my life (stored in the right hemisphere). All this happened outside of my conscious awareness and created a totally out of character reaction, both in my emotions and behavior.

Knowing the man as I did, I suspected he’d done it on purpose. This guy, a colleague I could barely tolerate, liked to mess with people’s heads.

I slapped on a big smile and went back into the room where the event was being held. Sailing past him, head held high, I paused briefly to thank him for hosting such a successful gathering, with a hint of sarcasm in my tone. He gave me a strange look. I hope that I successfully hid my own smirk.

Next time – how all this explains PTSD symptoms.

How about you? Has anything like that ever happened to you, where you acted out of character without understanding why? Do you find the human mind as fascinating as I do?

Please take a moment to check out my new release, Book 1 in a new series about a young woman who trains service dogs for combat veterans with PTSD.

ToKillALabrador FINALTo Kill A Labrador, A Marcia Banks and Buddy Mystery

Marcia (pronounced Mar-see-a, not Marsha) likes to think of herself as a normal person, even though she has a rather abnormal vocation. She trains service dogs for combat veterans with PTSD. Then the ex-Marine owner of her first trainee is accused of murdering his wife, and Marcia gets sucked into an even more abnormal avocation–amateur sleuth.

Called in to dog-sit the Labrador service dog, Buddy, she’s outraged that his veteran owner is being presumed guilty until proven innocent. With Buddy’s help, she tries to uncover the real killer.

Even after the hunky local sheriff politely tells her to butt out, Marcia keeps poking around. Until the killer finally pokes back.


Posted by Kassandra Lamb. Kassandra is a retired psychotherapist turned mystery writer. She is the author of the Kate Huntington psychological suspense series, set in her native Maryland, and a new series, the Marcia Banks and Buddy cozy mysteries, set in Central Florida.

We blog here at misterio press once (sometimes twice) a week, usually on Tuesdays. Sometimes we talk about serious topics, and sometimes we just have some fun.

Please follow us so you don’t miss out on any of the interesting stuff, or the fun! (We do not lend, sell nor otherwise bend, spindle or mutilate followers’ e-mail addresses. 🙂 )

You Might Also Like


  • Reply
    Eden Mabee
    April 19, 2016 at 3:09 pm

    I’ve been doing a lot of reading on how the brain works lately, so this is icing on an already intricately flavored (and quite filling!) cake. Thank you, Kassandra.

    • Reply
      Kassandra Lamb
      April 19, 2016 at 5:00 pm

      You’re welcome, Eden! Glad it was helpful.

  • Reply
    K.B. Owen
    April 19, 2016 at 10:17 pm

    Kassandra, thank you for sharing your example with us. I’m so sorry you had to deal with a dipsh!t like that. Objectifying a woman for any purpose is the last refuge of a small mind and an insecure soul.

    In my 20s I had an personal epiphany. My mother had quite casually related to me her reaction to my appearance immediately after my birth. I was a breech, forceps-delivered baby, and I had bruising on my face that she thought was a disfiguring birthmark. By her account, she went into hysterics at first sight of me.

    My therapist and I worked out that, even though I could not consciously remember the event, it was stored in my unconscious. My mom didn’t think anything of it in telling the story, but I’m convinced it had an impact on me. In my early 20s when I first learned of it, I had been dealing with issues of intimacy in my romantic relationships.

    I’m happy to say that the issue later resolved. I do believe recognizing this event had something to do with helping me.

  • Reply
    Shannon Esposito
    April 20, 2016 at 8:55 am

    I would say my fascination with our mind and consciousness borders on obsession so loved this post (except for the incident with the jerk, which I love that you recognized while you had the chance to do something about it.) In theory, I want to believe we have free will but since most decisions seem to bubble up as instructions from our unconscious, it seems we are not as in control as we like to think.

  • Reply
    Vinnie Hansen
    April 22, 2016 at 4:04 pm

    I second what Shannon said. The brain and its workings are infinitely fascinating to me. I’d like to know more about this statement: “The visceral sensations associated with memories and previous feelings are not all that accessible via our conscious minds.” Since my mom’s death last June, nearly every memory of her creates a visceral sensation, a hollowing in my stomach, or talons on my heart. Something as simple as picking up the Daughter mug she gave me can create the sensation. There seems to be a very thin wall between these visceral sensations and my conscious mind. What’s up with that?

  • Reply
    Prudence MacLeod
    April 23, 2016 at 6:17 am

    Hi Kassandra, I finally took the time to read this post. So very glad I did. In the words of Mr. Spock, “Fascinating.”

    Will be looking forward to the next installment.

  • Leave a Reply

    This site uses Akismet to reduce spam. Learn how your comment data is processed.