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性行動プロセスにおける障害が原因に

前の投稿 - 次の投稿 | 親投稿 - 子投稿.1 .2 | 投稿日時 2016-12-22 12:11
シアリス 
(ちょっと専門的な話になりますが)勃起は大脳に起きた性的な興奮が神経を通ってペニスに伝えられることで始まります。シアリス 通販興奮が伝わると陰茎海綿体の神経から一酸化窒素が放出されます。その刺激で作られるcGMPという物質のはたらきで海綿体の平滑筋が緩み、拡がった血管に血液が流れ込みます。
流入した血液で海綿体が膨張すると周囲の静脈は圧迫され、海綿体の内圧も高まります。狼1号この状態が勃起です。性行動サイクルの勃起のプロセスだけでもこのような複雑なメカニズムがあります。
そのプロセスのどこかに障害があると正常に勃起することが難しくなります。例えば、ストレスが強い場合や心配事がある場合には性欲が低下するため勃起しにくくなります。つまり、精神的な原因で大脳の性的な興奮が抑えられると十分に勃起できなくなるのです。
いったんは勃起しても、電動バイブその維持が困難になったり、性交中に萎えたりする中折れは精神的な理由ばかりでなく、体に原因があることで起きる場合もあります。
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前の投稿 - 次の投稿 | 親投稿 - 子投稿なし | 投稿日時 2016-12-23 14:29
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前の投稿 - 次の投稿 | 親投稿 - 子投稿なし | 投稿日時 2016-12-24 13:09
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