the vascular changes resulting in an erection are the result of _________ reflex.?
375099
Spinal\n\n\n\nErection is basically a spinal reflex that can be initiated by recruitment of penile afferents, but also by visual, olfactory, and imaginary stimuli. The reflex involves both autonomic and somatic efferents and is modulated by supraspinal influences. Several central transmitters involved in the erectile control have been identified. Dopamine, acetylcholine, nitric oxide (NO), and peptides, such as oxytocin and adrenocorticotropic/alpha-melanocyte-stimulating hormone, seem to have a facilitatory role, whereas serotonin may be either facilitatory or inhibitory, and enkephalins are inhibitory.
206477
I don't know if it will help with gaining or maintaining an erection or not; but I will advise that niacin is a strong supplement that will cause flushing and may cause you to feel very hot.  If you are going to take this, I would recommend that you take it in a more diluted form such as niacinamide.
972916
The erection is exclusive to men... since no part of a woman's body needs to get quite that stiff in order to have intercourse.  An aroused woman does have increased blood flow to her genitals, which can change their colour and stiffen the clitoris, but even so, she doesn't have the right anatomy to get anything as rigid as a normal male erection.
174642
Viagra is one of a class of drugs which affect the male erectile system. \n\nErections are not voluntary. They are controlled by the autonomic nervous system, which is in charge of such things as increasing heartrate when people stand up (very different hydraulic situation than lying down), for sweating, for deeper breating during exercise, and so on. \n\nThe signal from these nerves has the eventual effect of closing some blood vessel valves which in turn trap blood in the erectile  tissue (think sponge here) in the penis. It's all surrounded by a membrane with no stretch, so when the sponges fill up after their outlet valves are closed, there is no choice for them but to expand lengthwise. Rather like one of those long skinny ballons which get thick, up to a point, but after that get onger because the rubber won't stretch radially anymore. \n\nThis entire system can break down rather easily since it is one of those domino sorts of things. This domino knocks that one over and it knocks over the next and so on through any number of them. blood clotting works very much the smae way and can fail at any of the steps. So can erection; one of the steps even involves a gas nitric oxide, that no one had any idea was presnt in the human body until very recently. \n\nViagra makes one of the steps in this cahin reaction work rather better than it did; though it has little or no effect on those in whom erection is working fine anyway. There are several causes of erection difficulty, and Viagra (and its relatives) address one of the most common of them.\n\n======\n\nThe equivalent arousal system in women is somewhat different, more complex, and more tied to emotions. Arousal in women (usually) has the eventual effect of secreting lubricating fluid from the walls of the vagina. Neither viagra, or its relatives, does not, apparently, have a parallel effect in women. The manufacturers have been conducting studies in the hopes of identifying a similar effect. So far, Viagra and the others have no been shown to have such an effect.
574275
Your brain is sending a signal of arousal to your penis.  Blood is then rushed to that area, making it hard.  It just means that you are healthy.  In the long run, you may be less susceptible to prostate cancer, impotence (erectile dysfunction).
311337
The excitement triggers increased blood flow into the penis, and the swelling blood vessels cause your penis to become erect.\n\nNo one else is giving you a straight answer because they don't know why, and they're pretending to be clever.
872356
Yes, it is a leading cause of hardening of the arteries and can lead to erectile dysfunction. Think about it: the health of your circulatory system is crucial for that blood flow down below, not just in your heart!
1022295
Erection is a physiological process controlled by various neuroendocrinal and autonomic body function.It is controlled by parasympathetic nervous system which lead to vasodilation in vessels of corpora cavernosa that results in blood pooling in penis and hence produce erection.It is misconception that it occurs only during sexual arousal.its important for sexual functioning hence limbic system of brain do causes cascade of Nero endocrine changes to cause erection.limbic system may be activated by visual,auditory,touch sensation,smell or even just thought related to sexual feeling.but it can also occur without limbic system involvement(without sexual feeling) as it may be purely neural response.best example i can give is during REM sleep(dreamy sleep) or seizure activity.this is because of excessive autonomic neural discharges.special mention about pathological erection which is difficult to reversible is essential. it is usually due to vessels obstruction best example for it is sickle cell anaemia.
311800
Impotence is caused due to decrease in blood flow through th penis muscles..\nWhich may be caused due to\n\nAlcoholism \nFatigue \nAtherosclerosis (hardening of the arteries) \nDiabetes \nBrain or spinal-cord injuries \nHypogonadism (which leads to lower testosterone levels) \nLiver or kidney failure \nMultiple sclerosis \nParkinson's disease \nRadiation therapy to the testicles \nStroke \nSome types of prostate or bladder surgery \n\nI think mint doesn't afect you blood flow thus can't cause impotence
924685
Reflexes are pure nerve’s response! If you touch a flame with a finger you’ll immediately put it away as the result of just your nervous system response keeping homeostasis of your hand
683108
Erections can happen at any time for no apparent reasons especially in adolescents. I remember when I was a youngster just entering puberty it was happening to me every five minutes. Very embarassing.
34388
Blushing is caused by sudden arousal of the sympathetic nervous system, which dilates the small blood vessels of the face and body
752015
I'm aware of achieving a semi!  I don't know how any conscious man could achieve an erection and not be aware of it.  Once you feel the strain of the fabric and that ever-so-familiar twitch you'll always be aware of it!
509043
Circulation affects every part of the human anatomy.  Circulation is critical for erections of the tool.  Actually, for us guys, when we want blood attention to where we focus it, it gets there.  So relax and enjoy what you have.  We guys are made to be healthy.
102424
more foreplay, the longer you have an erection without sex, the more your buddy gets used to the feeling of being stiff.  During sex, don't just thrust til you spew, get a good rythm going, then ease it off, pay attention to her needs, then go back to thrusting, etc
1131399
Morning erections are a normal part of male physiology. In fact, when doctors are trying to determine whether or not a man's erectile dysfunction is physiological or psychological, they will often apply a nocturnal tumescence monitor, which monitors the presence and duration of erections during the night. Several things can cause morning erections. One, as the bladder fills during the night, it tends to trigger a spinal reflex that can cause erection. Also, the congestion caused by the full bladder can decrease the outflow of blood from the penis. There are aspects of normal sleep cycling that tend to induce erection as well.\n\nErections are mostly controlled by the autonomic nervous system. The parasympathetic part functions during relaxed states. Erections actually occur when men are in relaxed states (you don't need blood going to your penis when you are running from a lion) and early morning is simply one of the most relaxed states.
695300
There can be many causes for soft or weak erections, or problems maintaining an erection.  These causes include age (usually after 30), vascular problems, penis injury, such as damage to veins and arteries inside the penis, a hormonal imbalance, excessive stress and anxiety, diabetes, chronic smoking/drinking, drugs, over-masturbation and sexual exhaustion, or surgery.  If left untreated, weak erections can lead to permanent sexual dysfunction!