mechanics of erection

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porterrobinson

so i have read that an erection is basically a mechanic event. iknow about venous occlusion and arterial inflow and my question is, why can i not keep an erection especially in certain positions. i do not have a venous leak and in theory if i can get an erection should it not just stay this way? if by an erection my venes got closed due to the pressure shx would it fade so wuickly when nothing organically is wrong with me and i can get an erection. ijust cannot maintain it.

ao for it to be maintained i guess other things ought to be happening. likethe pelvic floor muscles need to stay contracted, inflow of arterial blood needs to be maintained, what happens after orgasm, why does the erection then fade? what mechanical or biological event
single, mid 20
diagnosed early 2020
indentation 20 degree bent to left, recurrence with new indentation below glans
tried vacuum device with no success

Mikel7

The interesting thing about an erection is it can come and go with the just thinking about it or any anxiety about it. Yes you do need the mechanics there and the vascular side of things too.  But there are a number of men who just by worrying about loosing the erection - they loose it.  The mind is a powerful organ.
Lump 4/2020, age 62 , Dr Levine 6-26-20, Dors Curve 11/2020, Peyronies
Vit E400mg, COQ10, Heat Therapy, Penimaster, Pentox, Cialis, Restorex
SNHL 7/2020 - Stopped all Meds because ototoxicity  Heat/traction/VED are working. CPPS Diagnosis - Stable :)

porterrobinson

yes but i am interested in it on a much deeper level. the mind is nothing scientific, what exactly happens when your mind cazses anxiety, on a microbiological level how dors erection work. like i know that adrenaline is basically an anti vasolidator and that makes sense. it seems there is so many aspects to sccount for that a scientific description of erections is not possible with our current knowledge? but on the otger hand its just a mechanical event, blood flows in(many aspects here though for the arteries to dialate and widen there must be a signal from the brain, the smooth muscularur in the arteries and CC must expand) then the trapping by compression of the bulbospongiosus and ischiocavernous muscles to trap blood but also the venes themselves get trapped by expansion of the tinica.
then there is stuff like prolactin which  get released after orgasm and that does something, it seems so complex and impossible to test what the exact cause of it is. androgens play a role tok although much less than one might think, in men with 50% testosterone production can and do still get NTE for example. the nervous system play a huge role too with oxytocin basically being the key here in "initiallizing" the erection

but my question is when you have an erection snd the blood is trapped and you have no venous leak why do you(I) lose the erection in a given scenerio? is it the pelvic floor, because there is not enoigh inflow and too much outflow?  
single, mid 20
diagnosed early 2020
indentation 20 degree bent to left, recurrence with new indentation below glans
tried vacuum device with no success

Hawk

To elaborate on Mikel's sound points.

It is, of course, normal for all erections to subside because it takes a chain of events to create/maintain an erection.
Also, erections are not binary.  It is not just an on/off thing.  There are infinite degrees of erection.  
There are infinite degrees of every link in the chain necessary to create/maintain an erection. (nerve pathways, NO2 production, NO2 receptor function Arterial flow, Venous flow)
Some positions (Standing for one) take a greater degree of arterial vs. venous flow.
If that one condition is borderline, that is all it takes to break the chain.

Erection is not the result of a group of factors; it is a long chain of factors that roughly goes
1. Psychological arousal and/or physical stimulation trigger the brain to release the neuro-transmitter Nitric Oxide (NO2) from the nerves of the penis
2. NO2 attaches to receptors (assuming the receptors are not blocked by adrenaline) that relaxes the deep arteries opening up the flow of blood into the penis
3. The inflow of blood begins to fill the penis.  This presses the veins near the surface and reduces outflow.
4. This causes more filling and more squeezing of the veins
5. If the stimulation continues, a feedback loop is created, and the brain releases more NO2 from the nerves in the penis to maintain the cycle

It takes more of all the above to maintain an erection in some positions than in others.  If you are producing some adrenalin from stress, if you have a little venous leak, if physical or mental stimulation is minimal, the chain can be broken enough to reduce your degree of erection when standing.  If it is reduced, that can cause more venous leak, which can cause more stress, and the chain disintegrates.

I hope this is clear enough to make sense.
Prostatectomy 2004, radiation 2009, currently 70 yrs old
After pills, injections, VED - Dr Eid, Titan 22cm implant 8/7/18
Hawk - Updated 10/27/18 - Peyronies Society Forums

porterrobinson

so why can i not get an erection standing then? here is another example. i used to be fine masturbation while lying on my back but ever since i got peyronies and the hourglassing i have only masturbated in a sitting positing leaning forward because it makes the penis feel more "whole" but now when i lie on my back i lose the erection almost instantly. doctor said nothing is wrong organically with my penis and the plaque is too small to cause any leak by itself. but i still cant at all get an erection only when im on my knees kneeling or sitting hunching forward. standing zero chance, on my back zero chance. so what is this then? do i have organic ED or psychogenic ED, what is the cause for my ED then? can you condition yourself to only get erect in a certain position? if one has no venous leak when sitting or when doing the doppler test what physical reason could there to not be able to maintain an erection? and if blood is already in the penis and you have no venous leak why would it leak out as soon as i get up? i just don't understand this. the only position i will ever be able to do is doggy and missionary now i guess but i am not elegible for any other diagnoses like cavernosography  
single, mid 20
diagnosed early 2020
indentation 20 degree bent to left, recurrence with new indentation below glans
tried vacuum device with no success

Hawk

Quote from: porterrobinson on April 21, 2021, 11:32:17 AM
so why can i not get an erection standing then?

It is difficult to believe you asked me that AFTER that detailed explanation.  There is some break in that chain.  There is no way I can know what the break is.

Is it stress/adrenalin?
is it psychological?
etc
etc

I don't know.

I hope with study and experimentation you will find the answer.  
Prostatectomy 2004, radiation 2009, currently 70 yrs old
After pills, injections, VED - Dr Eid, Titan 22cm implant 8/7/18
Hawk - Updated 10/27/18 - Peyronies Society Forums

porterrobinson

why does it have to be this complicated. i understand now why some men just get an implant it kills all birds with one rock, the cause for ED does not even matter in that case
single, mid 20
diagnosed early 2020
indentation 20 degree bent to left, recurrence with new indentation below glans
tried vacuum device with no success

Hawk

Our bodies are complex.  If it were simple there would be no need for a forum.  We would all take a pill and get better.

As I always say, this is a marathon, not a sprint.
Prostatectomy 2004, radiation 2009, currently 70 yrs old
After pills, injections, VED - Dr Eid, Titan 22cm implant 8/7/18
Hawk - Updated 10/27/18 - Peyronies Society Forums