In this video on UroChannel, Dr. med. Dr. phil. Stefan Buntrock, a board-certified urologist and sexologist from Göttingen, delves into the complex topic of erections. This is the second part of a miniseries aimed at explaining the various aspects of how erections occur. Sexual function is a multifaceted process with many unanswered questions, particularly regarding the role of the brain. While much of our knowledge is derived from animal studies, it is important to remember that translating these findings to humans is not always straightforward. Testosterone is a very important hormone for erections. It is produced in the testicles, is essential for the integrity of penile tissues and plays a crucial role in sexual desire for both men and women. The brain regulates testosterone production through the release of luteinizing hormone (LH). When discussing erections, one has to consider the entire sexual response cycle, including sexual desire, arousal, and orgasm/ejaculation. Sexual desire is paramount for achieving an erection, and lack thereof can contribute to erectile dysfunction. Sexual arousal involves physical changes such as erections, increased blood pressure, and altered breathing patterns. Anxiety and negative thoughts can interfere with sexual desire and arousal by activating the sympathetic nervous system, which hinders erections. The parasympathetic nervous system, on the other hand, needs to be activated for erections to occur, and this is facilitated by a relaxed state of mind. Dr. Dr. Buntrock also touches upon the interplay between hormones and neurotransmitters like dopamine, serotonin, and oxytocin, which influence sexual desire, erections, and ejaculation. He explains that the complex interactions between these substances and testosterone occur within different centers of the brain, leading to both promotion and inhibition.
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