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Encyclopedia > Paramedian reticular nucleus
Brain: Paramedian reticular nucleus
Latin paramedian nucleus reticularis
NeuroNames hier-731
Dorlands/Elsevier n_11/12583065

The paramedian reticular nucleus (in Terminologia Anatomica, or paramedian medullary reticular group in NeuroNames) sends its connections to the spinal cord in a mostly ipsilateral manner, although there is some decussation. Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... NeuroNames is a system of nomenclature for the brain and related structures. ... Elseviers logo. ... The Nomina Anatomica was one of the most popular systems for providing topographical codes in the 20th century. ... NeuroNames is a system of nomenclature for the brain and related structures. ...

It projects to the vermis in the anterior lobe, the pyramis and the uvula. Figure 1a: A human brain, with the cerebellum in purple. ... Diagram showing the uvula, tonsils, soft palate, and tongue Uvula without tonsils (after tonsillectomy) The uvula (IPA: ) is a small, mucosa-covered set of muscles, musculus uvulae, hanging down from the soft palate, near the back of the throat. ...

The paramedian nucleus also projects to the contralateral PRN, the gigantocellular nucleus, and the nucleus ambiguous[1]. The gigantocellular nucleus, as the name indicates, is mainly composed of the so called giant neuronal cells. ... The nucleus ambiguus is a cranial nerve nucleus, located in the medulla oblongata, and handles the branchial motor functions of the ninth (glossopharyngeal) and tenth (vagus) cranial nerves. ...

The paramedian reticular formation is adjacent to the abducens nucleus in the pons and adjacent to the occularmotor nucleus in the midbrain.

The paramedian nucleus receives afferents mostly from the fastigial nucleus in the cerebellum and the cerebral cortex; however, the projections from the spinal cord are very sparse. Figure 1a: A human brain, with the cerebellum in purple. ...

The descending afferent connections come mostly from the frontal and parietal lobes; however the pontine reticular formation also sends projections to the paramedian reticular nucleus.

There are also very sparse innervations from the superior colliculus. The superior colliculus is part of the brain that sits below the thalamus and surrounds the pineal gland in the mesencephalon of vertebrate brains. ...

Lesions in the paramedian reticular nucleus have been shown to cause a stereotyped increase in the random patterns of motion in rats[2]. The paramedian nuclei on either side of the brain stem have been shown to mediate the horizontal eye movements on their ipsilateral sides. It seems possible to suppose that that the random motion patterns of the above rats were caused by an inability to mediate their horizontal eye movements. Eye movements are the voluntary or involuntary movements of the eye. ... The anatomical planes The anatomical position is a schematic convention for describing the relative morphology of the human body. ...

See also

The paramedian pontine reticular formation, or PPRF, is a brain region, without clearly defined borders, in the center of the pons. ...


  1. ^ Jouvet, M. Handbook of clinical neurology vol 3. P. J. Vinken and G. W. Bruyen, eds. North Holland Publishing company. Amsterdam (1969).
  2. ^ Lee EH, et al. Multiple inhibitory actions of the paramedian reticular nucleus--effects on blood pressure and motor activities in rats. Chin J Physiol. 1990;33(1):49-61.

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...



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