septum pellucidum

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Related to septum pellucidum: caudate nucleus, Cavum septum pellucidum


 [sep´tum] (L.)
1. a wall or partition dividing a body space or cavity. Some are membranous, some are osseous, and some are cartilaginous; each is named according to its location. See also septal defect. adj., adj sep´tal.
alveolar septum interalveolar septum.
atrial septum (septum atrio´rum cor´dis) interatrial septum.
atrioventricular septum the part of the membranous portion of the interventricular septum between the left ventricle and the right atrium.
deviated septum an injury or malformation of the nasal septum so that one part of the nasal cavity is smaller than the other; this is fairly common and seldom causes complications. Occasionally the deviation may handicap breathing, block the normal flow of mucus from the sinuses during a cold, or prevent proper drainage of infected sinuses. In some cases surgery (called partial or complete submucous resection) may be necessary to relieve the obstruction and reduce irritation and infection in the nose and sinuses.
interalveolar septum
1. one of the thin plates of bone separating the alveoli of the teeth in the mandible and maxilla. Called also interradicular septum.
2. one of the thin septa that separate adjacent pulmonary alveoli, containing connective tissue and the capillary network of the blood supply of the lung. Defs. 1 and 2 called also alveolar septum.
interatrial septum (septum interatria´le cor´dis) the partition separating the right and left atria of the heart; called also atrial septum.
interradicular septum interalveolar septum (def. 1).
interventricular septum (septum interventricula´re cor´dis) the partition separating the right and left ventricles of the heart; called also ventricular septum.
nasal septum a plate of bone and cartilage covered with mucous membrane that divides the nasal cavity.
septum lu´cidum septum pellucidum.
pellucid septum (septum pellu´cidum) the triangular double membrane separating the anterior horns of the lateral ventricles of the brain; called also septum lucidum.
septum pri´mum a septum in the embryonic heart, dividing the primitive atrium into right and left chambers. See also congenital heart defect.
rectovaginal septum the membranous partition between the rectum and vagina.
rectovesical septum a membranous partition separating the rectum from the prostate and urinary bladder.
septum of ventricles of heart (ventricular septum) (septum ventriculo´rum cor´dis) interventricular septum.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

sep·tum pel·lu·'ci·dum

a thin plate of brain tissue, containing nerve cells and fibers, that is stretched like a flat, vertical sheet between the column and body of fornix below, and the corpus callosum above and anteriorly; it is usually fused in the median plane with its partner on the opposite side so as to form a thin, median partition between the left and right frontal horn of the lateral ventricles; in fewer than 10% of humans there is a blind, slitlike, fluid-filled space between the two transparent septa, the cavity of septum pellucidum. The transparent septum is continuous ventrad through the interval between the corpus callosum and the anterior commissure with the precommissural septum and subcallosal gyrus.
See also: cavity of septum pellucidum, septal area.
Farlex Partner Medical Dictionary © Farlex 2012

septum pellucidum

n. pl. septa pellucida (-də)
A thin membrane of nervous tissue that forms the medial wall of the lateral ventricles in the brain.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

sep·tum pel·lu·ci·dum

(sep'tŭm pe-lū'si-dŭm) [TA]
A thin plate of brain tissue, containing nerve cells and fibers, that is stretched like a flat, vertical sheet between the column and body of fornix below, and the corpus callosum above and anteriorly.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
The corpus callosum, the other great forebrain commissures, and the septum pellucidum: anatomy, development, and malformation.
Isolated absence of the septum pellucidum. Neuroradiology.
The following day, he underwent a left frontal craniotomy for transcortical resection of the colloid cyst, fenestration of the septum pellucidum, and placement of a left frontal ventriculostomy.
The cavum septum pellucidum is a normal midline structure that is easily recognized as an anechoic, commashaped entity located inferior to the corpus callosum and medial to the frontal horns of the lateral ventricles.
As a result of the absence of the corpus callosum and cavum septum pellucidum, the third ventricle tends to migrate more superiorly and is often dilated in infants who have ACC.
Brain MRI revealed agenesis of the corpus callosum and absence of the septum pellucidum (see figure).
The corpus callosum was absent anteriorly and the septum pellucidum was absent in entirety.
The history of subconcussive head impact and the presence of cavum septum pellucidum are supportive of CTE.
Axial image reveals both cortical and subcortical atrophy, enlarged lateral and third ventricle, and cavum septum pellucidum.
Finally, the endoscope was re-introduced and wide fenestration of the septum pellucidum was performed.
Most of the patients have associated anomalies such as neuronal migration disorders like as dysplasia or heterotopia, the absence of septum pellucidum, corpus callosum dysgenesis, septo-optic dysplasia.
A spherical mass, measuring 2.5 cm in diameter, was attached to the left side of the septum pellucidum at the level of the foramina of Monro (Figure, B).