NationMaster - Encyclopedia: Cremaster muscle

The cremaster muscle is a muscle that covers the testis. Image File history File links Layers_of_the_scrotum. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... A typical adult human skeleton consists of the following 206 bones, though a small portion of the human population have an extra bone, occurring in the form of an extra rib. ... The inguinal ligament is a band running from the pubic tubercle to the anterior superior iliac spine. ... A typical adult human skeleton consists of the following 206 bones, though a small portion of the human population have an extra bone, occurring in the form of an extra rib. ... Section of an artery For other uses, see Artery (disambiguation). ... The cremasteric artery (external spermatic artery) is a branch of the Inferior epigastric artery which accompanies the spermatic cord, and supplies the Cremaster and other coverings of the cord, anastomosing with the internal spermatic artery (in the female it is very small and accompanies the round ligament. ... List of human nerves External links List of nerves This is an incomplete list, which may never be able to satisfy certain standards for completeness. ... The genital branch of the genitofemoral nerve (external spermatic nerve) passes outward on the Psoas major, and pierces the fascia transversalis, or passes through the abdominal inguinal ring; it then descends behind the spermatic cord to the scrotum, supplies the Cremaster, and gives a few filaments to the skin of... Kinesiology is the scientific study of human movement. ... Elseviers logo. ... It has been suggested that this article or section be merged into Muscular system. ... The testicles, or testes (singular testis), are the male generative glands in animals. ...

Contraction

Its function is to raise and lower the scrotum in order to regulate the temperature of the testis and promote spermatogenesis. In some male mammals, the scrotum is a bag of skin and muscle containing the testicles. ... This article or section is in need of attention from an expert on the subject. ...

In a cool environment the cremaster draws the testis closer to the body preventing heat loss, while when it is warmer the cremaster relaxes allowing the testis to cool.

Clinically, a reflex arc can be demonstrated by lightly stroking the skin of the inner thigh downwards from the hip towards the knee. This causes the cremaster muscle on the same side to rapidly contract, raising that testicle. This so called cremasteric reflex is much more pronounced in children than in adults. A reflex action or reflex is a biological control system linking stimulus to response and mediated by a reflex arc. ... Diagram of the human thigh bone In humans the thigh is the area between the pelvis and buttocks and the knee. ... Cremasteric Reflex is a reflex in males only. ...

The cremaster can also be contracted voluntarily, by contracting the PC muscle (using Kegels), or by sucking in the abdomen. Not all males are capable of doing this, as it requires pelvic muscle strength. The pubococcygeus muscle or PC muscle is an important muscle in the human body. ... This article needs to be cleaned up to conform to a higher standard of quality. ...

Development and gender differences

The cremaster develops to its full extent only in males; in females it is represented by only a few muscle loops.

In human females, the cremaster muscle is smaller and is found on the round ligament. The hand mirror and comb of the Roman Goddess Venus is often used to represent the female sex. ... The round ligament originates at the uterus horns, that is, the point where the uterus and the uterine tubes meet. ...

In rats, it has been shown that cremaster muscles developed from the gubernacular bulb. This is an article about wild rats; for pet rats, see Fancy rat Species 50 species; see text *Several subfamilies of Muroids include animals called rats. ...

Structure

In human males, the cremaster muscle is a thin layer of skeletal muscle found in the inguinal canal and scrotum between the external and internal layers of spermatic fascia, surrounding the testis and spermatic cord. The cremaster muscle is a paired structure, there being one on each side of the body. Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin for wise man or knowing man) under the family Hominidae (the great apes). ... The shield and spear of the Roman God Mars are often used to represent the male sex In heterogamous species, male is the sex of an organism, or of a part of an organism, which typically produces smaller, mobile gametes (spermatozoa) that are able to fertilise female gametes (ova). ... A top-down view of skeletal muscle Skeletal muscle is a type of striated muscle, attached to the skeleton. ... The inguinal canal is a passage in the anterior abdominal wall which in men conveys the spermatic cord and in women the round ligament. ... In some male mammals, the scrotum is a bag of skin and muscle containing the testicles. ... The spermatic fascia is a bilayered fascia covering the testis; both layers are derived from abdominal muscle or fascia. ... Male Anatomy The spermatic cord is the name given to the cord-like structure formed by the vas deferens and surrounding tissue (veins, arteries, nerves, and lymphatic vessels) that run from the abdomen down to each testicle. ...

Anatomically, the lateral cremaster muscle originates from the internal oblique muscle, just superior to the inguinal canal, and the middle of the inguinal ligament. The medial cremaster muscle, which sometimes is absent, originates from the pubic tubercle and sometimes the lateral pubic crest. Both insert into the tunica vaginalis underneath the testis. The internal oblique is the intermediate muscle of the abdomen, lying just underneath the external oblique and just above (superficial to) the transverse abdominal muscle. ... The inguinal canal is a passage in the anterior abdominal wall which in men conveys the spermatic cord and in women the round ligament. ... This page meets Wikipedias criteria for speedy deletion. ...

Innervation and vascular supply

The cremaster muscle is innervated from the genital branch of the genitofemoral nerve and supplied by the cremasteric artery. In human anatomy, the genitofemoral nerve originates from the upper part of the lumbar plexus of spinal nerves. ...

It receives distinctly different innervation and vascular supply in comparison to the internal oblique. The internal oblique is the intermediate muscle of the abdomen, lying just underneath the external oblique and just above (superficial to) the transverse abdominal muscle. ...

Popular culture

Matthew Barney's film sequence The Cremaster Cycle used the cremaster muscle as its conceptual departure point. Album cover of Drawing Restraint 9 Soundtrack (2006). ... Cremaster (films) The Cremaster Cycle is a sequence of five films by Matthew Barney, entitled Cremaster 1 to Cremaster 5. ...

Additional images

External links

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Muscles of torso

BACK: splenius: (capitis - cervicis) - erector spinae (iliocostalis - longissimus - spinalis) - latissimus dorsi
transversospinales: (semispinalis dorsi - semispinalis cervicis - semispinalis capitis - multifidus - rotatores) - interspinales - intertransversarii GPnotebook is a British medical database for general practitioners (GPs. ... A garden sign welcomes residents and visitors to Rogers Park as home of Loyola University Chicago. ... The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City. ... eMedicine is an online clinical medical knowledge base that was founded in 1996. ... It has been suggested that this article or section be merged into Muscular system. ... The human torso Torso is an anatomical term for the greater part of the human body without the head and limbs. ... Painting of a womans back by Edgar Degas. ... The Splenius capitis muscle is a muscle of the human body. ... The xxxxx is a muscle of the human body. ... The Erector spinae (or Sacrospinalis in older texts), and its prolongations in the thoracic and cervical regions, lie in the groove on the side of the vertebral column. ... The iliocostalis is the muscle immediately lateral to the longissimus that is the nearest to the furrow that separates the epaxial muscles from the hypaxial. ... The longissimus is the muscle lateral to the semispinalis. ... The spinalis is the portion of the erector spinae located nearest to the spine. ... Latissimus dorsi is a large flat muscle located on the back. ... The transversospinales muscles are a group of muscles of the human back. ... The Semispinalis dorsi (or semispinalis thoracis) consists of thin, narrow, fleshy fasciculi, interposed between tendons of considerable length. ... The semispinalis cervicis (semispinalis colli), thicker than the semispinalis dorsi, arises by a series of tendinous and fleshy fibers from the transverse processes of the upper five or six thoracic vertebrÃ¦, and is inserted into the cervical spinous processes, from the axis to the fifth inclusive. ... The Semispinalis capitis (Complexus) is situated at the upper and back part of the neck, beneath the Splenius, and medial to the Longissimus cervicis and capitis. ... The Multifidus muscle is a muscle of the human body. ... The Rotatores muscle is a muscle of the human body. ... these muscles sometimes hurt me. ... Intertransversarii muscles The Intertransversarii are small muscles placed between the transverse processes of the vertebrÃ¦. In the cervical region they are best developed, consisting of rounded muscular and tendinous fasciculi, and are placed in pairs, passing between the anterior and the posterior tubercles respectively of the transverse processes of two...

SUBOCCIPITAL: rectus capitis posterior (major, minor) - obliquus capitis (inferior, superior) The first spinal nerve, the suboccipital nerve exits the spinal cord between the skull and the first cervical vertebra, the atlas. ... The Rectus capitis posterior major muscle is a muscle of the human body. ... The Rectus capitis posterior minor muscle is a muscle of the human body. ... In anatomy, the obliquus capitis inferior muscle, the larger of the two oblique muscles, is one of the muscles of the neck. ... It arises from the lateral mass of the atlas bone. ...

CHEST: intercostales (external, internal, innermost) - subcostales - transversus thoracis - levatores costarum - serratus posterior (inferior, superior) - diaphragm Chest of a human male The chest is a part of the anatomy of humans and various other animals. ... Intercostal muscles are several groups of muscles that run between the ribs, and help form and move the chest wall. ... The Intercostales externi (External intercostals) are eleven in number on either side. ... The Intercostales interni (Internal intercostals) are eleven in number on either side. ... The Innermost intercostal muscle is a layer of intercostal muscle beneath the intercostal nerves and internal intercostal muscles. ... The Subcostales muscle is a muscle of the human body. ... The tranversus thoracis lies internal to the thoracic cage, anteriorly. ... The Levatores costarum, twelve in number on either side, are small tendinous and fleshy bundles, which arise from the ends of the transverse processes of the seventh cervical and upper eleven thoracic vertebrae; they pass obliquely downward and lateralward, like the fibers of the Intercostales externi, and each is inserted... The Serratus posterior inferior muscle is a muscle of the human body. ... The Serratus posterior superior muscle is a muscle of the human body. ... In the anatomy of mammals, the diaphragm is a shelf of muscle extending across the bottom of the ribcage. ...

ABDOMEN: obliques (external, internal) - transversus abdominis - rectus abdominis - pyramidalis - cremaster - quadratus lumborum The human abdomen (from the Latin word meaning belly) is the part of the body between the pelvis and the thorax. ... The external oblique muscle (of the abdomen) (also external abdominal oblique muscle) is the largest and the most superficial of the three flat muscles of the lateral anterior abdomen. ... The internal oblique (or Obliquus internus abdominis) is the intermediate muscle of the abdomen, lying just underneath the external oblique and just above (superficial to) the transverse abdominal muscle. ... The transversus abdominis muscle, also known as the transversalis muscle and transverse abdominal muscle, is a muscle layer of the anterior and lateral abdominal wall which is just deep to (layered below) the internal oblique muscle. ... The rectus abdominis muscle is a paired muscle running vertically on each side of the anterior wall of the human abdomen (and in some animals). ... The pyramidalis is a muscle that is considered insignificant in humans. ... The Quadratus lumborum muscle is a muscle of the human body. ...

PELVIS: levator ani (iliococcygeus, pubococcygeus, puborectalis) - coccygeus The pelvis (pl. ... The Levator ani is a broad, thin muscle, situated on the side of the pelvis. ... The Iliococcygeus arises from the ischial spine and from the posterior part of the tendinous arch of the pelvic fascia, and is attached to the coccyx and anococcygeal raphÃ©; it is usually thin, and may fail entirely, or be largely replaced by fibrous tissue. ... The pubococcygeus muscle or PC muscle is an important muscle in the human body. ... The fibers which form a sling for the rectum are named the Puborectalis or Sphincter recti. ... The Coccygeus is situated behind the levator ani. ...

PERINEUM: sphincter ani (externus, internus) - superficial perineal pouch (transversus perinei superficialis - bulbospongiosus - ischiocavernosus) - deep perineal pouch (transversus perinei profundus, sphincter urethrae membranaceae) The muscles of the male perineum In human anatomy, the perineum is generally defined as the surface region in both males and females between the pubic symphysis and the coccyx. ... The Sphincter ani externus muscle is a muscle of the human body. ... The Sphincter ani internus muscle is a muscle of the human body. ... The superficial perineal pouch (also superficial perineal compartment/space/sac) is a compartment of the perineum. ... The Transversus perinei superficialis muscle is a muscle of the human body. ... Bulbospongiosus is one of the superficial muscles of the perineum. ... The ischiocavernosus muscle is a muscle just below the surface of the perineum, present in both men and women. ... The deep perineal pouch (also deep perineal space, or in Latin, saccus profundus perinei) is an anatomical term that refers to the partially enclosed space in the perineum, located superiorly to the perineal membrane. ... The Transversus perinei profundus muscle is a muscle of the human body. ... The Sphincter urethrae membranaceae muscle is a muscle of the human body. ...