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  • abdominal muscle deficiency syndrome
    congenital absence (partial or complete) of abdominal muscles, in which the outline of the intestines is visible through the protruding abdominal wall; in men, genitourinary anomalies (urinary tract dilation and cryptorchidism) are also found; genetics unclear.

    Alternate names: prune belly, prune-belly syndrome

    See Also: prune belly syndrome

  • Abdominal muscles

    Abdominal muscles: A large group of muscles in the front of the abdomen that assists in the regular breathing movement and supports the muscles of the spine while lifting and keeping abdominal organs such as the intestines in place. Abdominal muscles play a key role in exercises such as "sit-ups." They are informally called the "abs".

  • abdominal myomectomy
    removal of a myoma of the uterus through an abdominal incision.
  • abdominal nephrectomy
    transperitoneal removal of the kidney by an incision through the anterior abdominal wall.
  • abdominal ostium of uterine tube
    the fimbriated or ovarian extremity of an oviduct.

    Alternate names: ostium abdominale tubae uterinaeTA

  • Abdominal pain

    Abdominal pain: Pain in the belly. Abdominal pain can be acute or chronic. It may reflect a major problem with one of the organs in the abdomen such as: the appendix (being inflammed = appendicitis), the gallbladder (inflammed = cholecystitis), the intestine (an ulcer that has perforated), the spleen (that has ruptured), etc.

  • abdominal part of pectoralis major (muscle)
    portion of pectoralis major originating from the rectus sheath.

    Alternate names: pars abdominalis musculi pectoralis majorisTA

  • abdominal part of peripheral autonomic plexuses and ganglia
    portion of the autonomic nervous system (networks composed largely of autonomic nerve fibers—but also including visceral afferent fibers—and ganglia associated with blood vessels and organs) that occur both retro- and intraperitoneally in the abdominal cavity.

    Alternate names: pars abdominalis plexuum et gangliorum visceraliumTA

  • abdominal part of thoracic duct
    the part of the thoracic duct between the cisterna chyli and the aortic hiatus of the diaphragm.

    Alternate names: pars abdominalis ductus thoraciciTA

  • abdominal part of ureter
    the part of the ureter between the renal pelvis and the brim of the pelvis.

    Alternate names: pars abdominalis ureterisTA

  • abdominal pool
    the volume of blood within the abdomen.
  • abdominal pregnancy
    the implantation and development of the ovum in the peritoneal cavity, usually secondary to an early rupture of a tubal pregnancy; very rarely, primary implantation may occur in the peritoneal cavity. The blastocyst commonly implants in the rectouterine pouch of peritoneum.

    Alternate names: abdominocyesis1, intraperitoneal pregnancy

  • abdominal pressure
    pressure surrounding the bladder; estimated from rectal, gastric, or intraperitoneal pressure.
  • abdominal pulse
    the soft, compressible aortic pulse occurring in certain abdominal disorders.

    Alternate names: pulsus abdominalis

  • abdominal reflexes
    contraction of the muscles of the abdominal wall on stimulation of the skin (superficial a. reflexs) or tapping on neighboring bony structures (deep a. reflexes).

    Alternate names: supraumbilical reflex2

  • abdominal regions
    topographic divisions of the abdomen, as bounded by the vertical midclavicular lines and the horizontal transpyloric and interspinous (transtubercular) lines (see illustration).

    Alternate names: regiones abdominisTA, abdominal zones

  • abdominal respiration
    breathing effected mainly by the action of the diaphragm.
  • abdominal sac
    the part of the embryonic celom that becomes the abdominal cavity.
  • abdominal salpingectomy
    removal of one or both uterine tubes through an abdominal incision.
  • abdominal salpingotomy
    incision into the uterine tube through an opening in the abdominal wall.
  • abdominal testis
    an undescended testis that has never descended from the retroperineal/abdominal origin through the internal inguinal ring.
  • abdomino-
    Combining form indicating the abdomen, abdominal.
  • abdominocardiac reflex
    mechanical stimulation (usually distention) of abdominal viscera causing changes (usually a slowing) in the heart rate or the occurrence of extrasystoles.
  • abdominocentesis
    Paracentesis of the abdomen.
  • abdominogenital
    Relating to the abdomen and the genital organs.
  • abdominopelvic
    Relating to the abdomen and pelvis, especially the combined abdominal and pelvic cavities.
  • abdominopelvic cavity
    the combined and continuous abdominal and pelvic cavities.

    Alternate names: cavitas abdominis et pelvisTA

    See Also: abdominal cavity

  • abdominopelvic splanchnic nerves
    visceral branches of the sympathetic trunks conveying presynaptic sympathetic fibers to and visceral afferent fibers from the prevertebral ganglia and paraaortic/hypogastric plexuses for the innervation of viscera located below the diaphragm. The greater, lesser, lowest, lumbar, and sacral splanchnic nerves belong to this group.
  • abdominoperineal
    Relating to both abdomen and perineum, as in abdominoperineal resection of the rectum.
  • abdominoperineal resection
    a surgical cancer treatment involving resection of the lower sigmoid colon, rectum, anus, and surrounding skin and formation of a sigmoid colostomy; performed as a synchronous or sequential transabdominal and perineal procedure.
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