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Topic: Epithalamus


  
  Epithalamus History Summary   (Site not responding. Last check: 2007-09-08)
The epithalamus, a part of the diencephalon, is located superior and posterior to the thalamus and contains the pineal gland (also called the pineal body or epiphysis).
The pineal gland attaches via a stalk to the posterior boundary wall of the third ventricle of the cerebrum.
Other structural elements of the epithalamus include the habenula--also called the right and left habenular nuclei (nerve cells), sites studies indicate are important in the regulation of food and water intake--and the stria medullaris (a bundle of fibers terminating in the right and left habenular nuclei.
www.bookrags.com /history/health/epithalamus-wap   (507 words)

  
 IX. Neurology. 4c. The Fore-brain or Prosencephalon. Gray, Henry. 1918. Anatomy of the Human Body.
For descriptive purposes, however, it is more convenient to consider the whole of the third ventricle and its boundaries together; this necessitates the inclusion, under this heading, of the pars optica hypothalami and the corresponding part of the third ventricle—structures which properly belong to the telencephalon.
—The thalamencephalon comprises: (1) the thalamus; (2) the metathalamus or corpora geniculata; and (3) the epithalamus, consisting of the trigonum habenulæ, the pineal body, and the posterior commissure.
The trigonum habenulæ is a small depressed triangular area situated in front of the superior colliculus and on the lateral aspect of the posterior part of the tænia thalami.
www.bartleby.com /107/189.html   (13328 words)

  
 Chapter 14: The Brain and Cranial Nerves
It consists of the epithalamus, thalamus, and hypothalamus.
The epithalamus, or anterior portion of the diencephalic roof, forms the membranous roof of the third ventricle.
The anterior portion of the epithalamus contains an extensive area of choroid plexus that extends through the interventricular foramina into the lateral ventricles.
media.pearsoncmg.com /ph/esm/esm_martini_fundanaphy_5/bb/obj/14/CH14/html/ch14_6.html   (266 words)

  
 CNS ASYMMETRY AND LATERALITY
The epithalamus is a major subdivision of the diencephalic region of the forebrain constituted by the habenular nuclei and pineal complex.
Brain asymmetry in the wild-type zebrafish embryo is characterised at early stages by asymmetric expression of Nodal pathway genes on the left side of the epithalamus, e.g.
We propose that the epithalamus is initially bilaterally symmetric but this condition is unstable, and the symmetry is broken either by stochastic factors or other factors such as unilateral Nodal signalling.
www.ucl.ac.uk /zebrafish-group/htmlsite/asymmetry.html   (1075 words)

  
 Embryo: Epithalamus   (Site not responding. Last check: 2007-09-08)
The habenular nucleus, in the area of the epithalamus is well developed with fibres contributing to a habenulo-interpeduncular tract.
Dorsally, the epithalamus does not possess a marginal layer except in the region of the habenular nucleus which gives off fibres to the mesencephalic tegmentum (the habenulo-interpeduncular tract).
The epithalamus possesses a loose intermediate layer and a marginal layer.
www.ana.ed.ac.uk /anatomy/database/humat/notes/embryo/nervous/diencephalon/epithal.htm   (216 words)

  
 PPT Slide   (Site not responding. Last check: 2007-09-08)
The diencephalon is the region of the forebrain which includes the thalamus, epithalamus, hypothalamus, and pituitary gland.
The pineal gland, which secretes the hormone melatonin, is also part of the epithalamus.
The hypothalamus forms the floor of the third ventricle, and the pituitary gland is located immediately inferior to the hypothalamus.
csm.jmu.edu /biology/garrisne/Physiology/F/tsld084.htm   (137 words)

  
 Epithalamus (from human nervous system) --  Britannica Student Encyclopedia
The epithalamus is represented mainly by the pineal gland, which lies in the midline posterior and dorsal to the third ventricle.
More results on "Epithalamus (from human nervous system)" when you join.
More from Britannica on "Epithalamus (from human nervous system)"...
www.britannica.com /ebi/article-75536   (834 words)

  
 camouflage.html   (Site not responding. Last check: 2007-09-08)
Prior to transplanting an eye atop the head, the membranous neurocranium was excised to expose the epithalamus and mesencephalic tectum; the donor eye was then removed, floated into position and its optic nerve stump abutted against the pretectum.
Also uncertain was just how much of the epithalamus and the nearby pretectum had been spared or lost, and the histological data were inconclusive.
The camouflage reactions to not depend upon an intact epithalamus or tectum.
scs.indiana.edu /~pietsch/camouflage.html   (8707 words)

  
 Joshua Gamse, Ph.D.
The lab's attention is currently focused on the epithalamus, a brain region that exhibits dramatic L/R asymmetry in many lower vertebrates.
One mutant lacks asymmetric features in the epithalamus, but laterality of the visceral organs (including pancreas, gall bladder, and liver) is normal.
Directional asymmetry of the zebrafish epithalamus guides dorsoventral innervation of the midbrain target.
www.mc.vanderbilt.edu /devbio/jgamse.html   (239 words)

  
 Slit Inhibition of Retinal Axon Growth and Its Role in Retinal Axon Pathfinding and Innervation Patterns in the ...
RGC axons are tightly fasciculated as they course over the surface of the hypothalamus (Hy) but begin to defasciculate when they reach ventral thalamus, spread out dramatically over the lateral surface of dorsal thalamus (dTh), and later form and extend branches into their dorsal thalamic target nuclei (and to a lesser extent ventral thalamus).
As RGC axons extend beyond the dorsal thalamus and approach epithalamus (Epi), they refasciculate on the surface of diencephalon and turn caudally to grow toward the SC.
C, At E15, slit2 is highly expressed in medial dorsal thalamus and at lower levels in epithalamus, medial ventral thalamus, and in distinct parts of dorsal and ventral hypothalamus.
www.jneurosci.org /cgi/content/full/20/13/4983   (7343 words)

  
 Nervous System V: Forebrain   (Site not responding. Last check: 2007-09-08)
THIRD VENTRICLE -- hypothalamus, thalamus, and epithalamus form its floor, walls and roof III.
EPITHALAMUS A. Pineal Gland (Pineal Body): appears to regulate the body's clock * produces melotonin IV.
THALAMUS -- two oval masses of gray matter, covered w/white matter -- Major function: relay point and processing center for all sensory impulses (except smell) running to cerebral cortex V.
www.academic.marist.edu /VBSC/physiolab/notes5.htm   (219 words)

  
 Penn State Faculty Research Expertise Database (FRED)   (Site not responding. Last check: 2007-09-08)
The epithalamus is generally considered to include the habenular nuclei (HABENULA) and associated fiber bundles, the PINEAL BODY, and the epithelial roof of the third ventricle.
The anterior and posterior paraventricular nuclei of the thalamus are included with the THALAMIC NUCLEI although they develop from the same pronuclear mass as the epithalamic nuclei and are sometimes considered part of the epithalamus.
U.S. National Library of Medicine is the creator, maintainer, and provider of all MeSH 2004 data
fred.hmc.psu.edu /ds/retrieve/fred/meshdescriptor/D019261   (77 words)

  
 epithalamus - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "epithalamus" is defined.
epithalamus : Stedman's Online Medical Dictionary, 27th Edition [home, info]
epithalamus : Dorland's Illustrated Medical Dictionary [home, info]
www.onelook.com /?w=epithalamus   (86 words)

  
 Directional asymmetry of the zebrafish epithalamus guides dorsoventral innervation of the midbrain target -- Gamse et ...
Directional asymmetry of the zebrafish epithalamus guides dorsoventral innervation of the midbrain target -- Gamse et al.
Articles by Gamse, J. Articles by Halpern, M. Directional asymmetry of the zebrafish epithalamus guides dorsoventral innervation of the midbrain target
The zebrafish epithalamus, consisting of the pineal complex
dev.biologists.org /cgi/content/abstract/132/21/4869   (310 words)

  
 [No title]
The diencephalon has 4 regions all with thalamus in their names.
No, the first three foils are correct The epithalamus is dorsal to the thalamus.
The stria medullaris is a band of fibers carrying impulses from the septal area to the habenular nuclei.
www.kumc.edu /research/medicine/pharmacology/CAI/webCAI/anatomy/ua08.wbc   (964 words)

  
 Mouse Atlas of Gene Expression - Brain - Hypothalamus   (Site not responding. Last check: 2007-09-08)
An intact sagittal brain section of mouse at E12.5 stained with cresyl violet.
G.E., ganglionic eminence; E., epithalamus; D.T., dorsal thalamus; H., hypothalmus; O.R., optic recess.
Hypothalamus of diencephalon was cut by laser (arrow).
www.mouseatlas.org /data/mouse/stages/t20/61/view   (83 words)

  
 Retinal axon guidance by region-specific cues in diencephalon -- Tuttle et al. 125 (5): 791 -- Development
dramatically splay out over thalamus, and circumvent epithalamus as they
by substrate-bound and soluble activities in hypothalamus and epithalamus,
The repulsion is mimicked by a soluble floor plate
dev.biologists.org /cgi/content/abstract/125/5/791   (658 words)

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