of, affecting, or being on or near the surface; "superficial measurements"; "the superficial area of the wall"; "a superficial wound"
of little substance or significance; "a few superficial editorial changes"; "only trivial objections" (同)trivial
concerned with or comprehending only what is apparent or obvious; not deep or penetrating emotionally or intellectually; "superficial similarities"; "a superficial mind"; "his thinking was superficial and fuzzy"; "superficial knowledge"; "the superficial report didnt give the true picture"; "only superficial differences"
Muscles of male perineum (transversus perinei visible at center right).
Muscles of the female perineum (transversus perinei visible at center right).
Details
Origin
Inferior rami of the ischium
Insertion
The deep transverse perineal muscle of the opposite side
Nerve
Pudendal nerve
Identifiers
Latin
Musculus transversus perinei
Anatomical terms of muscle
[edit on Wikidata]
The transverse perineal muscles (transversus perinei) are the superficial and the deep transverse perineal muscles.
Contents
1Superficial transverse perineal
2Deep transverse perineal
3References
4External links
Superficial transverse perineal
The superficial transverse perineal muscle (transversus perinei superficialis) is a narrow muscular slip, which passes more or less transversely across the perineal space in front of the anus.[1]
It arises by tendinous fibers from the inner and forepart of the ischial tuberosity and, running medially, is inserted into the central tendinous point of the perineum (perineal body), joining in this situation with the muscle of the opposite side, with the external anal sphincter muscle behind, and with the bulbospongiosus muscle in front.
In some cases, the fibers of the deeper layer of the external anal sphincter cross over in front of the anus and are continued into this muscle. Occasionally it gives off fibers, which join with the bulbocavernosus of the same side.
There are some variations: it may be absent or double, or insert into the bulbocavernosus or the external sphincter.
Deep transverse perineal
The deep transverse perineal muscle lies in the perineum, a part of the pelvic floor. It arises from the inferior rami of the ischium and runs to the median plane, where it interlaces in a tendinous raphe with the other deep transverse perineal muscle of the opposite side.
The deep transverse perineal muscle is innervated by the pudendal nerve.
The function of the muscle is fixation of the perineal body (central tendon of perineum), support of the pelvic floor, expulsion of semen in males and last drops of urine in both sexes.[2]
The deep transverse perineal muscle lies in the same plane as the urethral sphincter and formerly the two muscles were described together as the constrictor urethrae.
References
^Maclean, Allan; Reid, Wendy (2011). "40". In Shaw, Robert. Gynaecology. Edinburgh New York: Churchill Livingstone/Elsevier. pp. 599–612. ISBN 978-0-7020-3120-5; Access provided by the University of Pittsburgh
^Saladin, Kenneth S. (2003). Anatomy & Physiology: The Unity of Form and Function (3rd ed.). McGraw−Hill. p. 354. ISBN 978-0072429039.
External links
Anatomy photo:41:11-0103 at the SUNY Downstate Medical Center - "The Female Perineum: Muscles of the Superficial Perineal Pouch"
Anatomy image:9148 at the SUNY Downstate Medical Center
Anatomy image:9163 at the SUNY Downstate Medical Center
Anatomy image:9172 at the SUNY Downstate Medical Center
v
t
e
Muscles of perineum
Perineum
Anal triangle
sphincter ani
external
internal
Ischioanal fossa
Pudendal canal
Middle
Perineal body
Urogenital triangle
superficial perineal pouch
superficial transverse perineal
bulbospongiosus
ischiocavernosus
deep perineal pouch
deep transverse perineal
sphincter urethrae membranaceae
Fascia
Superficial perineal fascia
Colles' fascia
(in scrotum and penis: Dartos)
Deep perineal fascia
Deep perineal fascia / superficial investing fascia (Gallaudet's)
(in penis: Deep fascia of the penis (Buck's))
Urogenital diaphragm
Inferior fascia (Perineal membrane)
Superior fascia
Pelvic diaphragm
Inferior fascia
Superior fascia
UpToDate Contents
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Innervation of the anterior perineal muscles and its morphological consideration.
Takahashi M, Sato T.
Anatomischer Anzeiger.Anat Anz.1985;158(1):65-78.
3 male and 3 female pelvic-halves were dissected carefully under a stereomicroscope in order to obtain more detailed data on the nerve supply to the anterior perineal muscles. At its origin from the pudendal plexus, the perineal nerve has a close relationship with the dorsal nerve of the penis or cl
1 Definition Der Musculus transversus perinei superficialis gehört zur Muskulatur des Beckenbodens und bildet zusammen mit dem Musculus transversus perinei profundus das Diaphragma urogenitale. 2 Verlauf Der Musculus ...
1 Definition Der Musculus transversus perinei profundus gehört zur Muskulatur des Beckenbodens und bildet zusammen mit dem Musculus transversus perinei superficialis das Diaphragma urogenitale. 2 Verlauf Der Musculus ...