Introduction to how reflexes work - reflex arc, monosynaptic and polysynaptic reflexes
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- Опубликовано: 28 май 2024
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"A reflex is a subconscious stimulus response mechanism. Clinically many reflexes are tested to identify any abnormalities in the reflex pathway which may indicate problems with the CNS or the PNS. Reflexes tested include superficial and deep tendon reflexes such as the triceps, biceps, brachioradialis, patellar and achilles reflex. What you are looking for in these reflexes are not the movement of the limbs but rather the contraction of the associated muscle.
A reflex involves sensory fibres delivering information to the CNS, and motor fibres carrying commands to the effectors via the PNS The reflex arc is the neural wiring of a single reflex and involves 5 steps"
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I'm learning a lot through your videos especially now during quarantine and our professors will be giving us exams despite not sending any lectures. Massive thanks for all your videos. It's a great help to a lot of struggling med students like me.
I'm in med school too. All the best! 🍀
Am in the same situation from JKUAT Kenya...all the best fellow medics😎
Same ..med student from South Africa here
So r u a doc now?
I have never hear such a wonderful explanation. Really enjoyed while watching it....
This video was beyond helpful! I loved the illustrations being drawn at the same time as the explanations. The drawings are actually really good.
Your videos are so good, informative, and narrated at a great pace. Aided with your simplistic but detailed drawings, make for a really useful and educational video. Watched a few on various topics that have never failed to help. Thanks for making the videos and the help.
Best ....... artist + teacher
Just the best description and explanation of Reflex responses...ever ! Thanks
Thank you for making this video. I had such a problem grasping these concepts and you explained it perfectly and made it clear for me to comprehend. You have a gift for breaking things down. My professor goes through the topics so fast and the text is difficult to understand. I am truly grateful. Thank u again. I’ll be checking out your other videos. ❤️
The information on the upper motor neurons being excitatory or inhibitory makes so much sense as to why you get hyperreflexia and + Babinski sign. Thank you!
You make complex things really easy❤️
Thank you very much for this very informative and nicely illustrated lecture.
This is a great video, I was stuck on the exact mechanism of the myotatic reflex and how the gamma motor neurons and alpha motor neurons were stimulated. This video made it as clear as day, truly remarkable how it can be made so simple yet my med school professors make it seem so complex smh. Thank you!
Thank you so much! I am so happy you upload videos!
Excellent explanations & layout. Thank you!
Thank you! I wouldn't pass my exams without you!
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You explained in easiest manner and only in 14 minutes. .amazing
Thank you so much sir☺☺
you explained all my reflex lectures in 15 mins. thanks a lot armando. i am learning a lot from you than my lecturers lol
Amazing. Thank you for sharing your wealth of knowledge and ability to teach.
Great Explanation plus drawing, I love it!
You just helped me so much a day before my exam. Thankyou so much ❤️❤️
Great explanation thanks for making it easy
Thank you for making it easier.. Ur diagrams are appreciable...
Very helpful!! Gave me so much information and helped me understand the reflexes so much more!
Thank you for saving my grades! 🙏🏼❤️
Thank you for making it so easy to understand!!!
Very interesting thanks for your time and helping students.
Thanks a lot! Keep making videos, please
14 min video that is worth watching! thanks
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I loved this!! Thank you so much!
At 7:22 the narrator says that "all synaptic reflexes involve interneurons". This is almost always the case, but not in the case of the stretch reflex which is a monosynaptic sensory --> motor synapse.
Steph Paoli I can’t understand something .. how stretch reflex is monosynapse when it has afferent that synapse with other efferent that inhibit the antagonist muscle ?
Great explanation ! It helped me alot👍
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Awesome drawing
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You made everything sounds easier than they are. 💪🏻😄
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thank you for teaching me when my A&P professor wouldn't :')
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Thank you sir.
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Please make a video on length servo and follow up servo mechanisms.
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Hv I ever told u... U r most amazing tutor on earth....! Ur lects provide me with knowledge & ur drawings render me speechless at same time!
You’re 10x better than my professor
thank you... really its going to help me in exam
Very good
The brain cells are just as reflexive to external stimuli as the parts of the body you've pointed out in this video. It is a chain reaction that has started before our birth and started with the very first organism.
Does anyone else hear what sounds like birds chirping in the background, or am I losing it?
Excellent !!!!
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Think about this: If you were to remove your ability to hear, then your sight, and then your ability to feel and then smell, what would your conscious experience be? Now imagine you were born that way (without any senses)... So now you have no senses and no idea of anything= no referential experience what so ever. What would that experience be? Our experience is dependent on our senses, and our faculties for sensing is all automatic= Reflexive. Reflexes are all electrical. Now extend this fact to every cell in your body: Billions of cells simultaneously reflex to give rise to the sensation of self and "consciousness".
cool
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The 1 dislike did not graduate medical school
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Lot of thanks
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My professor has nothing on you, I want to just go to class and draw this out for him so he can just talk over during lecture.
Smart Guy.
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What is e4 neuron in the patellar reflex arc ?
Is there a way to get the full picture of what he drew?
Sir, it'd be very helpful if can make a video on anatomy of female pelvis. Thank you.
thank you so much ^-^
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Love you 😍
I’m speechless walahi
Neural circuits are hard for me to remember, especially once you get to different sections of the CNS
Adnan A I see you commenting in literally every video I watch! I’m going to count how many times (1)
Around 13:30 - I still don't understand why the toes extend upwards - Yes, I get that due to pyramidal lesion / underdeveloped pyramidal system there will be no inhibitory message from the upper motor neuron, however, in the video it doesn't mention any excitatory message that is being transmitted to the extensor muscles of the feet / toes, so, why do they curl up? on top of that, we still have an excitatory message to the flexor muscles of the feet, so I don't understand how the babinski sign happens. I guess the actual response is much more complicated than the one given in the video? Anyway, great video regardless.
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