Ejakulasi Dan Ereksi

8/16/2019 Ejakulasi Dan Ereksi

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3/23

Ereksi dan ejakulasi

•Ereksi: mengerasnya penis agar dapat masuk kevagina

• Ejakulasi: penyempprotan kuat semen ke dalam dan keluar dari penis


4/23

Siklus respon seks

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Eksitasi: ereksi dan meningkatnya perasaan sek• Plato: intensifkasi proses sebelumnya dengan

peningkatan kecepatan jantung, tekanan darah,pernapasan, dan ketegangan otot

• Orgasme: ejakulasi dan respon lain yang menjad

puncak eksitasi seksual dan secara kolekti dialasebagai kenikmatan fsik yang intens

• Resolusi: kembali ke keadaan normal


5/23

Ereksi

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Pembengkakan penis oleh darah• Penis terdiri dari jaringan erektil, berongga

• Rangsangan seksual !mekanoreseptor diglans"#dilatasi#pengisian rongga#menekanvena#vasokongesti#ereksi


6/23

Re$eks ereksi

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Stimulasi mekanoreseptor di glans penis• Pusat pembentuk ereksi di medulla spinalis bagi

ba%ah

• Peningkatan aktivitas vasodilatasi parasimpatis penurunan aktivitas vasokontriksi simpatis ke ar

penis• 'itrat oksida melemaskan otot polos arteriol pen

• (asodilatasi hebat dan cepat

• Ereksi !total %aktu yang diperlukan )*+ detik"

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Parasimpatis juga menstimulasi keluarnya sekrebulboretral dan kelen ar uretha untuk ersi an k


7/23

Ejakulasi

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Emisi: pengosongan sperma dan sekresi kelenjatambahan !semen"

• Eksplusi: eksplusi kuat semen dari penis


8/23

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-ontraksi otot polos di dinding duktud dan kelentambahan yang dipicu oleh rangsangan simpatis

• -ontraksi oto rangka di pangkal penis yang dipicneuron motorik


9/23

Emisi

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.mplus simpatis menyebakan rangkaian kontrakpolos di prostat, saluran reptoduksi, dan vesikulaseminalis

• /ktivitas ini mengalirkan cairan prostat, kemudiasperma, dan akhirnya cairan vesikula seminalis

kolekti disubut semen" ke uretha• Spingter di leher kandung kemih tertutup erat u

mencegah urin keluar


10/23

Eksplusi

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Pengisian uretha oleh semen memicu impus saramengaktian serangkain otot rangka di pangkal

• -ontraksi ritmik otot& terjadi pada interval ,0 dmeningkatkan tekanan di dalam penis

• 1emaksa semen keluar melaui uretha eksterior


11/23

Orgasme

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-ontraksi ritmik yang terjadi selama vase eksplusemen disertai oleh denyut yang ritmik involumtpanggul

• Respon panggul dan sistemik ini berkaitan dengnikmat intens


12/23

Resolusi

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-embali ke a%al


13/23


14/23

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Penile blood flow is controlled by the autonomic erectio which provides parasympathetic (S2–S4) and sympath(T12–2) input to the pelvic ple!us, includin" the cavernerves that innervate the cavernosal arteries and trabecsmooth muscle#


15/23

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2hese nerves are responsible or the delivery o high localconcentrations o nitric o3ide to the trabecular smooth mu%hich results in rela3ation !4ig5 &"5 'itric o3ide di6uses acrsmooth*muscle membrane and activates guanylate cyclasproduce cyclic guanosine monophosphate !c71P"8 the biocascade that ensues results in altered potassium and calcichannel permeability8 ultimately, the decrease in cytosolic

concentration causes smooth*muscle rela3ation and increaregional blood $o%5++,+& Phosphodiesterase en9ymes !Pregulate this path%ay by inactivating c71P, %hich results elevated cytosolic calcium concentrations and smooth*mucontraction5 PE type ) is the most important isoen9yme icorpora cavernosa5


16/23

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2he signal !nitric o3ide" is released rom nerve endings oendothelial cells and activates a cascade reaction, %hichultimately leads to an increased cellular concentration o!cyclic guanosine monophosphate"5 2his second messengmolecule induces a series o events that lead to smooth*rela3ation through a reduction in the intracellular calciumconcentration5 2he en9yme PE*) !phosphodiesterase ty

reverses this e6ect by metaboli9ing the c71P to 71P rapclinically important inhibitors o this en9yme !sildenafl, vand tadalafl" all act to promote smooth*muscle rela3atioability to allo% c71P to accumulate %hen nitric o3ide is ras is the case %hen se3ual stimulation is present5


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18/23

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he somatic motor nerve supply arises rom the sspinal cord, %hose fbers join the pudendal nerveinnervating the bulbocavernosus and ischiocavemuscles, active during ejaculation and clima35/drenergic stimulation is responsible or cavernosmooth*muscle contraction and detumescence5

;holinergic nerves may contribute to the erectileprocess through adrenergic inhibition as %ell as causing release o nitric o3ide rom the endothel


19/23

• 2hree mechanisms trigger these vascular changes: psychore$e3ogenic and centrally originated !nocturnal erections"5Psychogenic erections occur through stimulatory path%ayssound, smell, sight and touch" that travel rom the spinal ecentres !2++


20/23

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espite considerable recent e3perimentation in models and human volunteers, inormation on thcentral path%ays o erection remains cursory at is kno%n that androgens play a predominantlymodulating role by their e6ect on libido and se3behaviour5 2estosterone enhances se3ual interes

the re?uency o se3ual acts8 it increases the reo nocturnal erections but does not e6ect re$e3oor psychogenic erections5


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• 2houghts or sensations initiate se3ual arousal

• Smooth muscles in the %alls o arteries in the penis rela3increased blood $o% into the penis

• 2he corpora cavernosa and the corpus spongiosum distenblood and produce an erection

• 1uscles in the perineum at the base o the penis contrac• Spermato9oa and seminal $uid become active and move

urethra

• / series o contractions o the muscles around the penis csemen to be e3pelled through the urethral meatus


23/23

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http:@@>urology5org@patientAinormation@conditionleAdysunction@• http:@@ukonlinetablets5com@blog@physiology*o*an

erection5html
http://4urology.org/patient_information/conditions/erectile_dysfunction/http://4urology.org/patient_information/conditions/erectile_dysfunction/http://4urology.org/patient_information/conditions/erectile_dysfunction/http://4urology.org/patient_information/conditions/erectile_dysfunction/

Ejakulasi Dan Ereksi

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