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Ejaculation and its disorders.
Arch Ital Urol Nefrol Androl. 1990 Mar; 62(1):137-48.AI

Abstract

Ejaculation is the final link of the male sexual function chain "Libido--Erection--Penetration--Achievement of Climax--Ejaculation". Each link is highly androgen-dependent. Although the initiation of a subsequent link is normally dependent on achievement of the previous link, each link has its own mechanisms, and can be made to occur in isolation. The basic requirements for ejaculation are the production of seminal fluid (mostly from the seminal vesicles) and its propulsion. The production of a normal volume of seminal fluid requires the presence of seminal vesicles and the maintenance of their secretion by androgens. The propulsion of seminal fluid is in 3 phases: I. Contraction of seminal vesicles; II. Closure of bladder neck (both due to T9-L2 sympathetic stimulation); III. Expulsion of semen from the bulb of the urethra (due to S2-S3 somatic stimulation). The coordination of these phases is probably at hypothalamic level. Failure of ejaculation may be classified into I. Deficiency of production of seminal fluid from (1) Absence of seminal vesicles or (2) Androgen deficiency from (a) Pituitary dysfunction or (b) Testicular interstitial-cell failure from a number of causes. Correction of androgen deficiency usually restores ejaculation.

Authors

No affiliation info available

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

2163111

Citation

Yeates, W K.. "Ejaculation and Its Disorders." Archivio Italiano Di Urologia, Nefrologia, Andrologia : Organo Ufficiale dell'Associazione Per La Ricerca in Urologia = Urological, Nephrological, and Andrological Sciences, vol. 62, no. 1, 1990, pp. 137-48.
Yeates WK. Ejaculation and its disorders. Arch Ital Urol Nefrol Androl. 1990;62(1):137-48.
Yeates, W. K. (1990). Ejaculation and its disorders. Archivio Italiano Di Urologia, Nefrologia, Andrologia : Organo Ufficiale dell'Associazione Per La Ricerca in Urologia = Urological, Nephrological, and Andrological Sciences, 62(1), 137-48.
Yeates WK. Ejaculation and Its Disorders. Arch Ital Urol Nefrol Androl. 1990;62(1):137-48. PubMed PMID: 2163111.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ejaculation and its disorders. A1 - Yeates,W K, PY - 1990/3/1/pubmed PY - 1990/3/1/medline PY - 1990/3/1/entrez SP - 137 EP - 48 JF - Archivio italiano di urologia, nefrologia, andrologia : organo ufficiale dell'Associazione per la ricerca in urologia = Urological, nephrological, and andrological sciences JO - Arch Ital Urol Nefrol Androl VL - 62 IS - 1 N2 - Ejaculation is the final link of the male sexual function chain "Libido--Erection--Penetration--Achievement of Climax--Ejaculation". Each link is highly androgen-dependent. Although the initiation of a subsequent link is normally dependent on achievement of the previous link, each link has its own mechanisms, and can be made to occur in isolation. The basic requirements for ejaculation are the production of seminal fluid (mostly from the seminal vesicles) and its propulsion. The production of a normal volume of seminal fluid requires the presence of seminal vesicles and the maintenance of their secretion by androgens. The propulsion of seminal fluid is in 3 phases: I. Contraction of seminal vesicles; II. Closure of bladder neck (both due to T9-L2 sympathetic stimulation); III. Expulsion of semen from the bulb of the urethra (due to S2-S3 somatic stimulation). The coordination of these phases is probably at hypothalamic level. Failure of ejaculation may be classified into I. Deficiency of production of seminal fluid from (1) Absence of seminal vesicles or (2) Androgen deficiency from (a) Pituitary dysfunction or (b) Testicular interstitial-cell failure from a number of causes. Correction of androgen deficiency usually restores ejaculation. SN - 1120-8538 UR - https://www.unboundmedicine.com/medline/citation/2163111/Ejaculation_and_its_disorders_ L2 - https://medlineplus.gov/bladderdiseases.html DB - PRIME DP - Unbound Medicine ER -