Muscle stretch reflex | Organ Systems | MCAT | Khan Academy

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  • เผยแพร่เมื่อ 7 ก.ย. 2024
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ความคิดเห็น • 68

  • @TheDeadlyBees
    @TheDeadlyBees 9 ปีที่แล้ว +23

    THANK YOU. I'm studying for a neuroanatomy final, the Powerpoints for which are a confusing-ass mess, and now I actually understand how the stretch reflex works. Very clear and descriptive.

  • @beyla8735
    @beyla8735 8 ปีที่แล้ว +24

    Thanks so much! I've been reading and reading trying to find out what this stretch reflex is, but this had me understand in les than 10 minute!

  • @Lukeee915
    @Lukeee915 8 ปีที่แล้ว +86

    Khan academy helped me get into dental school and now they still got my back!!

    • @n_92alharbi71
      @n_92alharbi71 3 ปีที่แล้ว +1

      What do need stretch reflex for in dental school?

    • @GauravSharma-hg2jj
      @GauravSharma-hg2jj 3 ปีที่แล้ว

      @@n_92alharbi71 same thing I was gonna ask him.

    • @samanthadelacruz5832
      @samanthadelacruz5832 3 ปีที่แล้ว

      In our school, We have physiology that covers this one😂😂

  • @silvertix2996
    @silvertix2996 4 ปีที่แล้ว +5

    Got me into med school
    Keeping me going while I’m here
    KUDOS! ❤️

  • @jermainejguillory
    @jermainejguillory 8 ปีที่แล้ว +6

    This was an AMAZING explanation of Gamma Loop activity. Thanks so much for this.

  • @Bhuji
    @Bhuji 3 ปีที่แล้ว

    Etymology
    late Middle English: from French, from Latin , diminutive of ‘mouse’ (some muscles being thought to be mouse-like in form).
    early 16th century (as a noun denoting reflection): from Latin ‘a bending back’,
    from ‘bend back’ (see reflect).mid 19th century:
    from Latin ‘bringing towards’, from the verb , from ‘to’ + ‘bring’.mid 19th century:
    from Latin ‘carrying out’, from the verb , from ‘out’ + ‘carry’.
    late Middle English: shortening of Old French , or from Latin ‘thorn, prickle, backbone’.

  • @BZSPIRIT
    @BZSPIRIT 9 ปีที่แล้ว +7

    This is the most straightforward explanation on this subject that I could find. Thank you so much.

  • @anniealcantara9264
    @anniealcantara9264 9 ปีที่แล้ว +1

    ok you are awesome! thank you so much. After much reading on the subject i had nothing until i saw this video. you just helped my lab report grade :)

  • @czicky
    @czicky 9 ปีที่แล้ว +3

    your videos are amazing. I love the different colors and the clear, simple explanations!

  • @nickscurvy8635
    @nickscurvy8635 5 ปีที่แล้ว +1

    I'm just here to learn about my body and also understand why bouncing out of the hole on my squat makes it stronger. Thanks for the info :)

  • @gahanasrinivas8810
    @gahanasrinivas8810 7 ปีที่แล้ว +3

    Finally I understand what's knee jerk

  • @hannibalchaw1425
    @hannibalchaw1425 9 ปีที่แล้ว +3

    u just earn one more fan, thank you a lot!

  • @TorresD92
    @TorresD92 4 หลายเดือนก่อน

    Thank you sir

  • @NathanDoyle11
    @NathanDoyle11 10 ปีที่แล้ว +6

    Great, thorough explanation. Subbed!

  • @tgastrula6552
    @tgastrula6552 5 ปีที่แล้ว

    Wow I never knew that the ventral region was above the dorsal sensory segment! Good job Khan!

  • @mermaidtale1
    @mermaidtale1 7 ปีที่แล้ว +1

    This makes much more sense than our Lecturers

  • @hiahlam8067
    @hiahlam8067 ปีที่แล้ว

    brilliant

  • @cristinaferri6457
    @cristinaferri6457 8 ปีที่แล้ว +2

    very simple and clear! Thank you very much!!

  • @mariospiteri8561
    @mariospiteri8561 6 ปีที่แล้ว +1

    Very well and simple explanation..! You earned another you tuber...! I want to understand why sometimes i have some tingiling in my foot...!? About 10 years ago i felt down walking on a garage ramp hitting my horse tail. I feld a big pain in my lower back when i felt down hitting on the horse tail..! Do you think that the tingiling in my foot its because of this..?? I have never feld this before a 1 year ago...!! What do you think about this plsss..??🤔

    • @1S1KNLJS
      @1S1KNLJS 4 ปีที่แล้ว

      10 years ago? And know you feel symptoms, unlikely but could be. But it is usually a sign from your body and should get it checked out as it can mean many things. Not a doctor though so idk 🤷‍♂️

  • @Keana43
    @Keana43 2 ปีที่แล้ว

    Told me all I need to know.

  • @harbautv
    @harbautv 9 หลายเดือนก่อน

    Great

  • @h.a3960
    @h.a3960 6 ปีที่แล้ว +1

    that was so helpful

  • @Ibrahimo7md
    @Ibrahimo7md 2 ปีที่แล้ว

    Thanks for the explanation 🔥😀

  • @Sarah-kg9zj
    @Sarah-kg9zj 7 ปีที่แล้ว +2

    AMAZING video

  • @matijastrok127
    @matijastrok127 8 ปีที่แล้ว +2

    awesom. great job, thnx!

  • @leomasterking
    @leomasterking 9 ปีที่แล้ว +3

    Can you describe how foot drop occurs with injury at the lower back?

    • @sab9351
      @sab9351 5 ปีที่แล้ว +2

      Ackram Jin :an injury at the lower back would be located at the L4-L5 vertebrae most likely, these vertebrae/nerves are connected to the sacral plexus which controls most of the motor and sensory functions in the leg. Because of this an injury to the nerve can effect the ability to flex the foot, resulting in foot drop. Other symptoms of this injury may include loss of vibratory sensation and two point discrimination, and loss of ability to flex at the knee.

  • @kabab1019
    @kabab1019 2 ปีที่แล้ว

    Anyone else absolutely destroy their kneecaps trying to get the knee jerk while he was talking 😂

  • @funtimes4145
    @funtimes4145 5 ปีที่แล้ว +1

    I was under the impression that in a reflex arc the afferent neuron connect to an interneuron in the spinal cord before connecting to an efferent neuron

  • @akshan1107
    @akshan1107 10 ปีที่แล้ว +4

    God bless!!!!

  • @mariepreuer7208
    @mariepreuer7208 2 ปีที่แล้ว

    Thank you so much, you are a life safer! :)

  • @jmjm3882
    @jmjm3882 2 ปีที่แล้ว

    Amazing 👏👏

  • @bothainah8420
    @bothainah8420 9 ปีที่แล้ว +6

    Thanks for the video. It's still confusing tho :(

  • @mqasimafridi9567
    @mqasimafridi9567 4 ปีที่แล้ว

    U made my day sir💞

  • @whatrtheodds
    @whatrtheodds 6 ปีที่แล้ว +2

    Thanks so so much! Subscribed!

  • @Sevival
    @Sevival 9 ปีที่แล้ว +3

    You sound like Matthew Mcconaughey

  • @Nishamukherjee1995
    @Nishamukherjee1995 9 ปีที่แล้ว

    Thanks....sir

  • @SY-ni9lb
    @SY-ni9lb 3 ปีที่แล้ว

    which afferent and efferent nuerones are involved in the stretch refex?

  • @coachsouvik
    @coachsouvik 4 ปีที่แล้ว

    From my understanding , when it's stretched or reflexed then you hit with a rubber hammer on knee cap tendon...It ll flex and contract.....Not stretched...You said stretched in the video...

  • @MedicalNemesis
    @MedicalNemesis 7 ปีที่แล้ว +1

    what about hyperreflexia? Where is the physiological inhibition of the muscle reflex response that is lost in some CNS-pathologies?

  • @jackieoneill838
    @jackieoneill838 6 ปีที่แล้ว

    I have been getting jerks from my left leg for a few years, and I have not been to a doctor for this at all. Can anyone please let me know what it is because my full leg will go away from me as well at the same time, and force my self back up right then start to walk with pain and my leg even though I know that my leg is swelling up at the same time. I have had this for years and years.

  • @faheym1
    @faheym1 8 ปีที่แล้ว +5

    But this video still doesn't answer why Hyperreflexia occurs in MSR mechanism???

    • @olympicfitness
      @olympicfitness 6 ปีที่แล้ว +4

      Faheem Haider to be honest I don't think that was their intention.

    • @deepavelayutham6913
      @deepavelayutham6913 6 ปีที่แล้ว

      Hyper reflexia can occur in an upper motor neuron lesion ..but here they s no involvement in UMN

  • @Ha-be2hk
    @Ha-be2hk 4 ปีที่แล้ว

    looooooooooooooooooooove you

  • @TrainerHutch
    @TrainerHutch 6 ปีที่แล้ว

    how fast does the muscle stretch reflex happen on avg.?

  • @bm032ue9
    @bm032ue9 ปีที่แล้ว

    🙏

  • @ICatchTheStars
    @ICatchTheStars 10 ปีที่แล้ว

    Did you miss the patella tendon connecting the patella and the thigh muscle?

  • @justinsantos9684
    @justinsantos9684 8 ปีที่แล้ว

    wait i still dont get it. what does the stimulus exactly do to the system such that it is detected by the muscle spindle?

    • @bendflikshteyn
      @bendflikshteyn 8 ปีที่แล้ว +4

      the stimulus (like the hammer) stretches the muscle. the sensory fibers of the muscle spindle are the afferent part of the reflex and pick up on this stretch. the motor neuron corrects for that stretch with contraction.
      tldr: stretch

  • @PropagatorNET
    @PropagatorNET 6 ปีที่แล้ว +1

    Bassiest voice ever...

  • @makim.3924
    @makim.3924 6 ปีที่แล้ว

    2 💓

  • @pithikoulis
    @pithikoulis 9 ปีที่แล้ว

    Isn't this guy the same who talks about the Mantis shrimp?

  • @sandwitht6264
    @sandwitht6264 9 ปีที่แล้ว

    Christopher Walken?!

  • @makim.3924
    @makim.3924 7 ปีที่แล้ว +2

    nothing about muscle spindle😅

  • @andhemills
    @andhemills 9 ปีที่แล้ว +55

    Would you be my neighbor?

    • @Jungys95
      @Jungys95 8 ปีที่แล้ว

      +Andy Mills Flanders from the Simpsons XD

  • @Nikolay_Milenkov
    @Nikolay_Milenkov 5 ปีที่แล้ว

    Why are there Bulgarian subtitles lol :D

  • @nathanhorton8150
    @nathanhorton8150 9 ปีที่แล้ว

    put some gloves on!

  • @bdog1g
    @bdog1g 7 ปีที่แล้ว

    This video was very helpful, however I do have to correct you. There is no such thing as a lower leg. The leg is from your knee to your ankle. Anything above your knee to your hip is considered the Thigh.

  • @ghassanauf8103
    @ghassanauf8103 4 ปีที่แล้ว

    this video is way overestimated , you did not even mention any neuron type in this reflex . ashamed video

  • @antonioorr2547
    @antonioorr2547 ปีที่แล้ว

    Gogirllove good fun ask iow tallme you yes saye itss talking narsevolume