internal sphincter is present in female and Females do have a more elaborate external sphincter muscle than males as it is made up of three parts: the sphincter urethrae, urethrovaginal muscle, and the compressor urethrae.
I just remembered watching this a few years ago and it was very interesting, so I had to look it up again. incidentally, watching this while I have a full bladder makes me appreciate it all the more. lol
I'm a nursing student and even though I don't need to know how micturition works in this much detail, your explanations were just so well-done and intriguing that I couldn't stop watching.
Absolutely remarkable! Thank you so much for posting this. It would also be really helpful if you could briefly describe the pathophysiology of the various types of urinary incontinences.
Thank you so much :) Just a note, some medschools teach that females do have an internal sphincter, as physiologically they do, but anatomically it hasn't been found. Check your course requirements.
It is a functional sphincter not anatomical; so it is correct to state that females also have an internal sphincter even though it is not found like a separate structure with dissection like the male one
Wait, are you sure that both male and female have internal urethral sphincter? Try search it up on google and female KUB system has internal sphincter as well
Dear Dr.Armando very nice video and explanation. i have a small correction on ur video that the hypogastric nerve is in the Lumber region L2, just to in form the people who follow ur videos including me, and again thank u very much
Dear Armando I am a medical student from Denmark and I enjoy your videoes very much. They supplement my reading very well. I do have a question though about the voiding reflex that you mention in the last part of the above video. You describe it as it is an interplay between the sensory nerve fibers ind the detrusor muscle, the interneuron in the sacral part and the pelvic nerve that makes a loop and ensures continued voiding. As I understood it, the voiding reflex is based on an interplay between sensory fibers in the urethra, not the detrusor. In my mind this makes more sense, in that the flow of urine will keep the urethra dilated and thus stimulate the stretch receptors there, whereas the sensory fibers of the detrusor will not stretch at all during contraction. What are your thoughts on this? Thanks for your time and effort.
The best explanation ever💓😍just that the females do have an internal sphincter...but the rest of the video is just outstanding😍💓 may Allah give u the reward for helping students💓
Unlike male anatomy, in which the bladder neck and prostate comprise the internal urinary sphincter, the internal sphincter in females is functional rather than anatomic. So this means that women have a internal sphincters. So according to my source your info is incorrect?
This is an astonishing presentation. I am casting a wide net I search of a cure for my incontinence 10 months after surgery (NNS RALP/PLND). I’ve found nothing more clear or complete on the anatomy of this topic, including explanations and diagrams from my own doctors and therapists. Thank you!
I am in love with your hand writing, and you're diagrams are also impeccably neat. It's as though you were born to stand before a white board and shine light on obscure physiology topics.
It's funny. In Med and Bio classes we still need to draw things like this. I am terrible at it, but you are getting graded on the fact that you have an understanding of where everything is. Not how well you draw them
This video is extremely helpful! I would definitely recommend watching before your micturition session for class. It would make understanding pharmacology better!!
Awesome.. nuerogenic bladder?? After a major bladder reconstruction? UCDavis used my stomach intestines to create new walls for my bladder. Which is a less pressure muscle vs my bladder walls. I need a help.. please be on RU-vid still lol UCSF has my surgery documented for the ucsf students. Anything to help further generations in teaching complicated health problems
I have a dog that retains urine. them leaks uncontrollably his bladder was ultrasounded at 2000 ( yes 2000) ml of urine. his bladder si called "flaccid" and no one seems to be able to help him. any ideas??
@armano I beg to differ. Though you are right about all the nerves. But sympathetic nerves I.e. the hypogastric nerve has little to no role to play in micturition. They are mainly responsible for prevention of reflux of Semen in the bladder during ejaculation. Rest all is fine. Please refer Guyton and Ganong. Thankyou.
Acids like bad fats and sugars create acidic caustic pH scale to some extent and alkaline is created by Omega fatty acids healthy fats lots of water and fiber humps do that. This directly affects your blood cleaning organs so to speak like your liver and your kidneys, but blood sugar levels in your blood are specifically important to it. This would also be relevant when it comes to alcoholism which is essentially fermented sugar in concentrate which is terrible for your system.
What part of the system is messed up in shy bladder syndrome? That is, people are making an effort to pee, but they cannot due to psychological stress.
Think logically guys During parasympathetic u need to urinate so that dextrusor muscle should contract Ok in video its correct BUT Sphincter muscle should be relaxed and nicotinic recepor contracts muscle because its ion gat ed channel So its wrong that it have nicotinic receptor . Please make video by taking a good reference book.
Sir please answer me... Does urine act as ecf for depolarisation of stretch receptor present in uri. Bladder if yes Then how depolarisation occur as in urine k+ level is high???
Not only does a lack of nutrition create a caustic situation for your bloodstream but then adding toxic kind of caustic heavily oxidated protein fats like saturated fat that's bad for you been treated with chemicals, this kind of erodes your arteries but it's not just your arteries your circulatory system goes throughout your whole body and you need the lymphatic system to pump those antibodies throughout your body and white blood cells you have to move your body to do that your limbs like your legs and your arms and as stated a lot of that blood flow is directly clean through those kidneys so your liver and kidneys can be highly taxed and as your blood flows caustically if it doesn't have a good pH it can literally erode your arteries and then the bad fats plaque it up to try and spackle those caustic potholes that they initially created, you don't even have good fats to repair it so it's just terrible you need lots of water alkaline blood lots of fiber fruits and vegetables and you need healthy Omega fatty acids and fish or you know an Omega substitute for something like fish that's packed high and niacin or like flaxseed barrage etc come out drink lots of water it's not that hard and then you need to move your body or at least an hour a day specifically for cardio you don't have to jog it doesn't have to be strenuous it just has to be consistent with the intention of walking at a moderate to brisk Pace you don't even have to pass walk and it's better if you get out in nature to do so I wish you'd let me I'm tired of f****** sleeping all the time having welts on my body and burning my feet at night
Are there any nerves that would sense a tingle/pressure/pleasurable sensation when you really have to pee close to the urethral opening that could be damaged in a cytoscopy or laproscopic hysterectomy?
Also micturition reflex is basically a spinal reflex controlled by the central nervous system. So what you say is partly true but not completely. A spinal reflex is started which is facilitated or inhibited by the pontine facilitatiry and mid brain inhibitory areas
? females do not have and internal urethral sphincter ! think it is present .and thats is the the eternal urethral sprinter that is not so well developed --hence increased stress incontinence - please make time to clarify
I think this was left out of my medical school lectures... thank you for making and sharing these so I can better understand urinary physiology, pathology, and pharmacology
Hi Armando! My friend and I are studying for our homeostasis exam and we love your videos! You have really helped us :) We have a question though. When we looked at old exams we saw in one of the answers that the sympathetic receptor on the detrusor muscle is an Beta 2 - receptor and not a Beta 3 - receptor as it is in your video. Do you know which one is the correct one? Keep on being awesome please!
Thank you for this explanation, now I understand better that normal functioning of active voiding contractions are initiated by messages of the efferent side of the reflex arc .
After months of searching for answers as to why I have a myogenic bladder, could you possibly offer some insight to what causes that? Perhaps I could share with my doctor. I have seen an upwards of 15 different specialists and have had numerous invasive tests that have revealed nothing except a myogenic bladder. Thank you.
Anecdotally, I have degenerative disk disease and lumbar spinal stenosis extending into the sacral region. If I urinate standing up (I am a male age 71) I get post void leakage, even though my bladder feels empty. If I sit to urinate, I manage to get my bladder truly empty as no leakage occurs. Can you explain the mechanics of what is going on in terms of your diagram. Does this invo;ve the Onuf nucleus in S2.
Another great video! Wondering why is it that it's easier to understand with the male anatomy though? The "male as default" is a bit frustrating, especially in medicine where 50% of our patients are biologically female. Just a thought moving forward.
