What Is Thought? Exploring the Neuroscience
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- Опубликовано: 1 июн 2024
- Thoughts may be the most important content of our mental lives. Thoughts are unobservable and seemingly intangible, yet they determine what we do and therefore how our lives go. In this episode, I explore the neuroscience of human thinking.
This livestream was originally aired live only for Patreon supporters of Sense of Mind. If you'd like to get access to future livestreams as well as exclusive blog posts, go to / senseofmind .
Timestamps:
00:00 What are thoughts?
03:20 The neuroscience of thought is young
04:00 Externally and Internally Generated Thought
06:45 The role of attention in thought
07:17 Spontaneous thought
09:35 External thought and the frontoparietal control system
11:20 Internal thought and the default mode network (DMN)
13:30 Social cognition and the DMN
17:10 Spatial working memory, vivid detailed thought, and the posterior cingulate cortex (PCC)
19:50 The context dependent nature of thought
22:15 The salience network as a switch between DMN and FPN
26:20 The potential role of hippocampal sharp wave ripples in spontaneous thought
28:46 Sensory systems in thought
29:35 Working memory in thinking (and corticostriatal memory gating)
32:14 Valuation, the anterior cingulate, orbitofrontal cortex, & ventral striatum
34:05 Language and human thinking
37:28 Feelings and other influences on thought
39:44 What do you think?
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Sources:
Smallwood, J., Turnbull, A., Wang, H. T., Ho, N. S., Poerio, G. L., Karapanagiotidis, T., ... & Jefferies, E. (2021). The neural correlates of ongoing conscious thought. Iscience, 24(3).
Kucyi, A., Kam, J. W., Andrews-Hanna, J. R., Christoff, K., & Whitfield-Gabrieli, S. (2023). Recent advances in the neuroscience of spontaneous and off-task thought: implications for mental health. Nature mental health, 1(11), 827-840. 
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You said some cool things. One thing though, you said something that doesn't make sense "there is no stimulus and response with respect to hippocampal memory storage". How does the retrieval of memory happen from the hippocampus if there is no (stimulus and response) between (hippocampus) and other brain regions through relay? I think you might be using terms wrong here. Place cells are in fact associative memory, just a different kind, it's all associative (Rather what is different is the parallel integration of dendritic additives/subtractive ContextOfFocus/ContextOfInhibition = Specific parsing pathway activation magnitude. (context windows). (dendritic filtering of competing sequential information Depolarization/HyperPolarization/Thresholds).
Your right! I did make a mistake by saying “associative” memory. I meant to say that *procedural* memory doesn’t depend on the hippocampus. My apologies for that fumbling of words (this is one of the hazards of recording these episodes live).
@@senseofmindshow That was really good content, Thank you for sharing.
Great stuff, great content.
Thank you!
I've read about people who have no inner voice or incapable of mental visualization. Wonder how "thought" takes form in these cases
That’s a very interesting question 🤔 I’ll have to think about that ;)
There have been times where I tried to remember things, couldn't, and when I moved on and let my mind rest, the memory emerged. Does this have basis in neuroscience?
If we were to just sit still while thinking about moving our limbs, would regions like the motor cortex or cerebellum be activated?
There is evidence that thinking about moving your body activates premotor and motor cortex (in not sure about the cerebellum). This has been suggested as the neurobiological basis of the observation that, in some cases, visualization of an actions seems to enhance performance of that action in the future.
Some questions :please let me know about the pathways of mesolimbic, VMPFC, DLPFC, Insula-Amydala: 1). How are they connected? 2). What types of neurotransmitters are acting on or modulating these neuronal networks?. Which networks have5-HT2A-2C receptors as the predominant receptors in these networks.? 4). Can you recommend any illustrated books or videos of lectures that describe these networks?
Cwn you please tell me about the pathways of mesolimbic, VMPFC, DLPFC, Insula-Amydala: 1). How are they connected? 2). What types of neurotransmitters are acting on or modulating these neuronal networks?. Which networks have5-HT2A-2C receptors as the predominant receptors in these networks.? 4). Can you recommend any illustrated books or videos of lectures that describe these networks?
Loved it! But one comment-
Language is universal to all living creatures.
(They just don't speak English...)
Timestamps!
On it!