The Nervous System

041 - Animal Nervous System
Paul Andersen begins this podcast with a discussion of brain lateralization and gives a brief demonstration of tests that were performed on split-brain individuals. He then discusses the major parts of a neuron and explains how action potentials are generated using voltage-gated ion channels. He explains how neurotransmitters transmit messages across a synapse and how these messages can be either inhibitory or excitatory.
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Intro Music Atribution
Title: I4dsong_loop_main.wav
Artist: CosmicD
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Creative Commons Atribution License
All of the images are licensed under creative commons and public domain licensing:
Bananas, n.d. openclipart.org/detail/20182/b....
"File:Action Potential Vert.png." Wikipedia, the Free Encyclopedia. Accessed December 9, 2013. en.wikipedia.org/wiki/File:Act....
"File:Butyric-Acid-3D-Balls.png." Wikipedia, the Free Encyclopedia. Accessed December 9, 2013. en.wikipedia.org/wiki/File:But....
"File:Hemispheres.png." Wikipedia, the Free Encyclopedia. Accessed December 9, 2013. en.wikipedia.org/wiki/File:Hem....
"File:Neuron Hand-Tuned.svg." Wikipedia, the Free Encyclopedia. Accessed December 9, 2013. en.wikipedia.org/wiki/File:Neu....
"File:Synapse diag1.svg." Wikipedia, the Free Encyclopedia. Accessed December 9, 2013. en.wikipedia.org/wiki/File:Syn....
Flower 7 Colors, n.d. all-free-download.com/free-vec....
Saltcellar, n.d. openclipart.org/detail/4452/sa....
Sun, n.d. openclipart.org/detail/126151/....

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E

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Mr. Anderson you are literally the lifeline of my whole bio class. You can explain more in 5 minutes than my teacher can in 5 weeks

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*no other sentence can be taken so many different ways*

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You have such a knack for making a complex subject understandable. Salty banana is exactly the type of easy to remember memory prompt which is so useful in an exam. Thank you

[@Nicole3900]

Keep in mind: In the PNS, myelin sheaths are made out of Schwann cells. In the CNS, myelin sheaths are made out of oligodendrocytes.

[@xxwafflez]

Salty banana. Great analogy, really helped me understand where the concentration gradients began and changed. Thanks!

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salticrax

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Me too bro!

[@nightfox380]

Took A&P and gained a rough understanding of the Na+/K pump, action potential, and nerve synapses, but now everything is suddenly clear after watching this video. Thank you so much for this.

[@DontBeThatGuyy]

That moment when you finally realize what the lines on a heart monitor are

[@Competitive_Antagonist]

You mean the action potential? It's actually a bit different. The heart trace is a composite from the electrical activities from the various ventricles and valves of the heart. The heart trace looks quite different, but is similar in that it has an excitatory and refactory stage. The different peaks can tell you a lot about the different fuctions of the heart, like long QT. The peaks are named QRST in respective order and a heart with the long QT will take longer to go through the 4 peaks making it less efficient at distributing oxgyen to the body. Someone more qualified may explain this better, but I don't think the action potential is the same as the heart trace.

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My AP Bio teacher assigns these to us for HW and it's honestly so helpful!! You explain everything so simply so I can understand but it gets the lesson through really well!

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Your voice is so soothing!

[@jbfamequeen]

Just wanted to say that i've watched this video probably four times and each time I've been confused about action potentials and the potassium pump - but finally I got it! I feel so proud of myself but also so thankful to you for explaining this process so well. Thank you so much for all the hard work you do!!

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So informative and simplified! I've been watching your videos since Grade 12 and they've continued to help me through first year university science courses. Thank you so much for your help!

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The salty banana is the first time I was able to get the ions correct. Each other explanation is confusing about what flows where-when. Brilliant, as simple as anything but explains it perfectly.

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Oh my God I am so grateful for this man. he is the best explaining this subject. I can say i have learnt more with him than with my teacher. She only read ppt at class. Thanks Mr. Anderson, you are the best.

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Haha 'salty banana', that's the best analogy ever, cheers!

[@lorreeandco.7717]

Glad I'm not the only bio student coming here with a jumble of confusing notes about action potentials and Na/K pumps, looking for a better explanation. 🥴 You actually make sense. But I'll still need to watch this one a few more times haha

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Good sir, you make biology interesting. Got an A on my test thanks to you :3

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My favourite video - it helped me in school, in a biology olympiad and is still helping me in college. Thank you very much!

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My teacher showed us this video in class a while ago... I live in germany but our school lets us choose between biology class in german or in english, so this is extremely helpful for me, so THANK YOU!

[@baileyedwards4530]

The explanation of the split brain thing reminds me of that episode of House with the guy whose left hand hated everyone.

[@sarahhess464]

Bailey Edwards The human brain is a interesting machine . Who know to what extend a person can manipulate the human body with the right conditioning and training or access the subconscious mind. I know some people who been training for years in such disciplines and technique's. They can control their heart beat and body temperatures and reset their sense of smell. When people get used to a smell they stop noticing it , They can also boost up the sense of smell and even able to push aside external distraction to more easily focus on sound and this makes them better at detecting lies. When people lie theirs a small shift in sound or variation for some people it is very slight almost unnoticeable for others it more bold and easier to detect. They keep trying to develop new disciplines and techniques to manipulate their own body and minds. I understand they are currently trying to mimic the effect of channeling electrical power through them without killing them. They heard about a man who is able to do it and are trying to mimic the effect. People sense accurate things about people all the time on a instinctual level. I wonder if its genetic or trainable. They do look very much alike.

[@ElaGTheBoss]

+Bailey Edwards yeah, I did a research project on alien hand syndrome (inspired by that episode of house), the corpus callosum surgery is actually one of its main causes too.

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Wow, thank you so much for this video. I could not, for the life of me, understand what an action potential was and you completely cleared that up for me.

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[@coraliematthews4295]

Many thanks for these informative, easy to understand videos, am studying neuroscience at the moment and these straightforward explanations are exquisite. I have I hope (thanks to my neurons) kept most of the info imparted.

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Super cool then and now 2021...thanks

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great video! that actually really helped me understand my college bio exam.

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Midterms tomorrow. I am gonna spend all night watching these.

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