Nervous system 1, Motor neuron

Basic structure and function of the nervous system. Often people gloss over the 'simple' stuff, and miss areas of important understanding. The main things are the plain things, and often, the plain things are the main things. Please draw your own diagram, rather that taking the short cut of freeze faming and screen capture.
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Motor means to do with movement. When we decide we want to move part of the body a motor neurone in the brain will generate a new nerve impulse. The same neurone will then carry this impulse away from the brain towards a synapse with an other motor neurone which will then carry the impulse into the PNS.
A nerve impulse is electrical in nature and is generated in the cell body. This is an enlarged area of the cell which contains the nucleus and most of the cell organelles. From here the impulse travels away, along a fibre of the motor neurone called an axon. Any nerve fibre which carries information, in the form of an electrical nerve impulse, away from a cell body is defined as an axon.
There are also dendrites connected to the motor neurone cell body. A dendrite is defined as any nerve fibre which carries information towards a cell body. Typically a motor neurone consists of short dendrites conveying information towards the cell body and a longer axon carrying information away. Nerve fibres are essentially long thin projections of the cytoplasm. Despite being very thin, nerve fibres can be very long. For example, some motor neurone axons originate in the spinal cord and run the full length of the legs into the feet.
Because motor neurones initiate movement they often connect to skeletal muscles. When an axon approaches the muscle it supplies it divides into a number of smaller fibres which end in specialised structures called the synaptic end bulbs. These bulbs are responsible for conveying the impulse from the axon into the muscle. A muscle will only contract when it is stimulated to do so by the nerve impulse. As motor neurones carry impulses out from the CNS they are sometimes referred to as efferent neurones (remember ‘e’ for Efferent and for Exit).

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    Me to from 2021

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    Thank you for the video, it's really helpful when you explain the parts of the nerve like the hillock...being a hill, very helpful for memorizing all the parts of the nerve. Greatly appreciated.

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    Thank you so much Dr Campbel for a great explanation of Motor neurone, it did make my life easier! The upcoming Bioscience exam doesn't look scary anymore :)

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    First time I learn SO much, from such a CLEAR explanation. Thank you!!

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    thank you for this. im a stroke survivor ( left side) watching to add to my knowledge and hopefully improve my motor function in the arm (and leg). subscribed.

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    thank you so much for teaching so nicely may you live long

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    Thank you Dr Campbell for your video; like all of them most well done too of course.

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    Campbell is the best Doctor… you helped me like you do not know..

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    @user-tw6gh4bu8z5 ай бұрын

    Thank you sir for all the anatomy classes

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    Dr.John Campbell thanks u so much for your lesson.... Am also studying it because of covid-19..God bless u..u made everything so easy than in class...

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    I really enjoy your style of teaching. very engaging

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    Merry Christmas comrade John my Doctor,very vivid and well elucidated lecture.

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    @Campbellteaching

    4 жыл бұрын

    And to you brother James, have a great new year.

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    Thank you so much Dr Campbell for such a helpful lecture..

  • @krisdej6056
    @krisdej60562 жыл бұрын

    Very clear and make my learning about neuron much easier. Thank you

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    Thank you Dr Campbell I really enjoy presentations

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    You are really great at what you do ,it's really helped me very much

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    thanks for english subtitle so clear language that he is teaching us english as well .

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    @tfoxen75184 жыл бұрын

    Thank you, so very much! Simplicity in Excellence. Guillain-Barre Syndrome (GBS) (and the variants), Chronic Inflammatory Demyelinating Polyneuropathy (CIDP), Multi Motor Neuropathy (MMN) are other considerations in peripheral demyelinating (often with cranial nerve involvement) autoimmune disorders. I am thoroughly enjoying and learning from your videos, as come here due to the new coronaviris videos. Many thanks.

  • @Campbellteaching

    @Campbellteaching

    4 жыл бұрын

    Thats good, there are plenty to be going on with. Do let me know how you get on.

  • @tfoxen7518

    @tfoxen7518

    4 жыл бұрын

    @@Campbellteaching Thank you. I had GBS, support others with the neurological disorders I had mentioned, work (licensed massage therapy) with patients with pain and spinal disorders/injury, and love pathology and research as a personal interest. Later life path. All the best to you and yours!

  • @dg5580
    @dg55802 жыл бұрын

    The first step to understanding pain in a certain area of the body is to learn the many internal systems that connect to the painful area. When you know how the body operates on the many levels of your bodily systems, you can begin to relate to the signals that you may personally NOT understand that YOU may be able to control more readily in your healing process. Thanks Dr. Campbell for helping me with this part of my healing process! Your friend...DEVEREE

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    I never had any challenge in anatomy and physiology back in college because of your teachings ❤❤

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    @gabbyrogersnest7514 жыл бұрын

    Thank you so much for making this easy to understand. ☺️

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    @hudaa.j.87824 жыл бұрын

    Thanks a million, you are an amazing teacher 🌹

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    Thank you Dr I really enjoy your presentations

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    @apratimtewari42883 жыл бұрын

    thank you sir. you explain it easily and efficiently

  • @annaterese7855
    @annaterese785521 күн бұрын

    Watching in 2024 for my Biomed exam - lifesaver - much clearer than my college lecture :-)

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    @widsonchibanga83263 жыл бұрын

    You are helping doctor am watching this in 2021 while studying from home because of covid-19 am from Zambia 🙏🙏❤

  • @erickmercado8023
    @erickmercado80233 жыл бұрын

    Thank you Dr. Campbell!!! Great explanation!!!!

  • @charliespiano9893
    @charliespiano98934 жыл бұрын

    great video, i've learned so many fancy words for my biology gcse!!

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    @masuulmedia73332 жыл бұрын

    I really appreciate your lectures thanks

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    @laonemoegele8034 жыл бұрын

    thanks to my teacher at home ur lectures really help

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    @jagjeevandeshmukh22503 жыл бұрын

    Very good & easy way of explanation 🙏

  • @mingakinsgibayuxds7542
    @mingakinsgibayuxds75425 жыл бұрын

    Thank you doctor Campbell pour your work. I deeply appreciate it! Please make a video on Parkinson disease. Nursing student from Switzerland

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    @Cyndimansfield4 жыл бұрын

    When Saint John goes on holidays we still have years of back log recordings to listen to. !

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    @ma.suzettefalcunitin52074 жыл бұрын

    Thanks Dr Campbell!

  • @BiologyOnTv
    @BiologyOnTv3 жыл бұрын

    Very nice descriptory lecture. Thanks...

  • @japreet_kah
    @japreet_kah3 жыл бұрын

    Another good one John!

  • @ceciliawanjiru1636
    @ceciliawanjiru16367 жыл бұрын

    Well explained. Thanks Sir.😊

  • @shashimoghe3920
    @shashimoghe39202 жыл бұрын

    Dr john Campbell sir your great humanitarian providing us sea of vital knowledge about our body anatomy may God bless you with sound health and joyful life thanks 08/07/2022

  • @hillary7261
    @hillary72616 жыл бұрын

    Thank you. Very well done

  • @lafonaaron
    @lafonaaron10 ай бұрын

    Great style of teaching

  • @goldkhw
    @goldkhw2 жыл бұрын

    I know all about these synapses just from reading. And I'm not in the health field at all but I was waiting for you to say "synapse." One of the Goon Show guys used to have terrible depression because he had no treatment years ago. Once the synapses shriveled and died they were gone forever and all the treatment in the world wouldn't help. Apparently, that is why it is very important to have treatment early on to prevent the synapses from dying.

  • @octbrr3151
    @octbrr3151 Жыл бұрын

    best teacher ever!

  • @drguutaalemedicallecture6066
    @drguutaalemedicallecture60665 жыл бұрын

    Excellent dr thanks

  • @learnwithcaliana10
    @learnwithcaliana102 жыл бұрын

    OMG. Thanks sooooo much. Great information!

  • @alwinaanam1231
    @alwinaanam12317 жыл бұрын

    Sir thanku for such amazing video...

  • @ranabeauty1748
    @ranabeauty17483 жыл бұрын

    This vid help me so much I thought the motor neurone was herd but now it’s like drinking water thx doctor

  • @justinaibe5080
    @justinaibe5080Ай бұрын

    You are a born teacher

  • @valariemusilwa4512
    @valariemusilwa4512 Жыл бұрын

    Learning alot here, from kenya❤❤

  • @Sherirose1
    @Sherirose16 жыл бұрын

    As usual thanks so much!!!

  • @abugresabastian8473
    @abugresabastian8473 Жыл бұрын

    Good work.

  • @omar-yz3im
    @omar-yz3im3 жыл бұрын

    Thanks following from Egypt

  • @mwadjumamukamfizi2216
    @mwadjumamukamfizi22164 жыл бұрын

    Thanks a lot this was so helpful

  • @hidayatullah6740
    @hidayatullah6740 Жыл бұрын

    Great concept thanks....!

  • @halimaalnaes2107
    @halimaalnaes21072 жыл бұрын

    Thank you so much Mr :)

  • @jond2955
    @jond29553 жыл бұрын

    Thank you! So well explained :-)

  • @xuanhangduong6825
    @xuanhangduong68258 жыл бұрын

    Thank you!

  • @rumaisahkhan4491
    @rumaisahkhan44913 жыл бұрын

    Thank you doctor🥺🥺i have my test tomorrow 🥺🥺

  • @PAIKUN.
    @PAIKUN.5 жыл бұрын

    thank you sir!

  • @ME-xh5zq
    @ME-xh5zq4 жыл бұрын

    Thank you for clearing that up, there are only 2 types of excitable cells in the body. Are the words neurone and nerve fibre be used interchangeable?

  • @Campbellteaching

    @Campbellteaching

    4 жыл бұрын

    A neurone is actually a nerve cell, the fibre is part of the nerve cell, which is not the cell body. So a whole neurone will consist of the cell body, axons and dendrites.

  • @ME-xh5zq

    @ME-xh5zq

    4 жыл бұрын

    @@Campbellteaching ah thank you. One cell body is able to support thousands of fibres. Interesting.

  • @eternalpassionandwhatever7147
    @eternalpassionandwhatever71473 жыл бұрын

    wow very clear !

  • @denniskasaine5006
    @denniskasaine5006 Жыл бұрын

    I'm greatfull i have learned alot....

  • @yeygetup1577
    @yeygetup15774 жыл бұрын

    Thank you

  • @alimokdad1510
    @alimokdad15107 жыл бұрын

    great master

  • @tiffanybedward453
    @tiffanybedward4532 жыл бұрын

    Thank you docki!

  • @aladeendirar1841
    @aladeendirar18415 жыл бұрын

    Thank u very much sir i am from sudan and i like the way that u are clarify the concepts bug please can u download videos for cns embryology?

  • @Campbellteaching

    @Campbellteaching

    5 жыл бұрын

    The only book I know on this is Greys Anatomy. Do you have a copy?

  • @Gabbbbyyyy
    @Gabbbbyyyy4 ай бұрын

    i heard that A level biology is very similar to CAPE so i'm trying to watch vids while studying because it can be overwhelming having to read a whole chapter in such short time

  • @thelmachilufya8997
    @thelmachilufya89973 жыл бұрын

    Very helpful thank you

  • @saacidsamakaab9997
    @saacidsamakaab99974 жыл бұрын

    Thank you verymuch

  • @rerimontgomery6272
    @rerimontgomery62724 жыл бұрын

    Thanks awesome very interesting

  • @Sherirose1
    @Sherirose16 жыл бұрын

    Sorry to be personal but do you have any issues breathing Dr?Please look after yourself. You're a brilliant teacher.