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Topic: Cerebral hemisphere


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  Cerebral hemisphere - Wikipedia, the free encyclopedia
A cerebral hemisphere (hemispherium cerebrale) is defined as one of the two regions of the brain that are delineated by the body's median plane.
The frontal lobe is demarcated in red, the parietal lobe in orange, the occipital lobe in yellow, and the temporal lobe in green.
The hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers, and also by other smaller commissures, including the anterior commissure, posterior commissure, and hippocampal commissure.
en.wikipedia.org /wiki/Cerebral_hemisphere   (922 words)

  
 NationMaster.com - Encyclopedia: Cerebral hemisphere   (Site not responding. Last check: 2007-11-07)
The calcarine fissure (or calcarine sulcus) is on the medial surface of the hemisphere.
The cerebral hemisphere is one half of a brain.
Cerebral Cortex or Cortices of the cerebral hemispheres.
www.nationmaster.com /encyclopedia/Cerebral-hemisphere   (3807 words)

  
 Cerebal Palsy-What Is It?   (Site not responding. Last check: 2007-11-07)
Cerebral palsy ("CP") is a disorder of muscle control caused by lack of development or damage to specific areas of the brain.
Athetoid cerebral palsy and ataxic cerebral palsy are dyskinetic (extrapyramidal) forms of cerebral palsy resulting from damage to the basal ganglia and the cerebellum.
Athetoid cerebral palsy is defined by involuntary slow, writhing movements, mostly in the upper extremities.
www.clsphila.org /abc_for_advocates_files/cerebral_palsy.htm   (1137 words)

  
 Pavlov's Work of the Cerebral Hemisphere   (Site not responding. Last check: 2007-11-07)
The reason is clear, the work of the cerebral hemispheres has never been regarded from the same point of view as that of other organs of the body, or even other parts of the central nervous system.
On the one hand, the study of the cerebral hemispheres, as of all other parts of the organism, seems to come within the scope of physiology, but on the other hand, it is an object of study by a special branch of science - psychology.
The essential feature of the higher nervous activity, with which we shall be concerned and which in the higher animal is probably inherent in the cerebral hemispheres alone, is not only the action of countless signalling stimuli, rather it is the important fact that in certain conditions their physiological action changes.
www.marxists.org /reference/subject/philosophy/works/ru/pavlov.htm   (4704 words)

  
 cerebral hemisphere
Nervous System / Organization of the Nervous System / CNS Each cerebral hemisphere is divided into five lobes, four of which have the same name as the bone over them: the fontal lobe, the parietal lobe, the occipital...
Brain Each cerebral hemisphere is divided into five lobes, four of which have the same name as the bone over them: the frontal lobe, the parietal lobe, the occipital...
Each cerebral hemisphere is divided into ________ lobes, ________ of which have the same name as the bone over them.
www.cancer-help.org /cancer/0604/cerebral_hemisphere.html   (578 words)

  
 Bioline International Official Site (site up-dated regularly)
Such redistribution of cerebral blood flow could have either a cerebral protective or ischemic effect depending on the relative effects of the anesthetic in the normal brain areas and the brain areas with tumor.
in cerebral hemispheres with and without tumors, nitrous oxide produced comparable changes in both the hemispheres (62 ± 14 to 74 ± 17 cm.s-1 on the healthy side and 72 ± 18 to 86 ± 16 cm.s-1 on the tumor side).
Future studies with varying concentrations of inhalational agents and more direct techniques of measurement of cerebral blood flow are required to examine the regional differences in vascular reactivity to inhalational anesthetics and their implications in the management of patients undergoing surgery for intracranial tumors.
www.bioline.org.br /request?ni04019   (1854 words)

  
 [No title]
Greater EEG amplitudes of one brain hemisphere correspond to predominant airflow in the opposite nostril.
A lateralized vasoconstriction on one side of the brain and the relative dilation of blood vessels on the other may be the means by which a central mechanism regulates the alternating dominance of the cerebral hemispheres.
The endogenous rhythm of alternating cerebral dominance is tightly coupled to the nasal cycle; this suggests that unilateral, forced nostril breathing does selectively alter the pattern of cortical dominance as exhibited by EEG amplitude activity.
home.gwi.net /~erichard/cerebr.htm   (1222 words)

  
 [No title]
The left hemisphere, therefore is provided a competitive advantage over the right in motor control, such that in response to tool making and gathering activities by men and women over the course of human evolution, this half of the brain became specialized for imposing temporal sequences on both external and internal stimuli (Chapters 6,7).
Grammar is a left cerebral function, and temporal-sequencing is a fundamental property of language as demonstrated by the use of syntax and grammar.
The left hemisphere is genetically predisposed to become dominant for the denotative, syntactic, lexical, grammatical, and motor-expressive aspects of speech--a consequence, in part, of the earlier maturation of the left corticospinal tract which provides the left frontal motor areas a competitive advantage over the right in motor expression.
brainmind.com /LeftHemisphere.html   (19715 words)

  
 Cerebral cortex definition - Medical Dictionary definitions of popular medical terms
Cerebral cortex: A thin mantle of gray matter about the size of a formal dinner napkin covering the surface of each cerebral hemisphere.
The cerebral cortex is crumpled and folded, forming numerous convolutions (gyri) and crevices (sulci).
The cerebral cortex is responsible for the processes of thought, perception and memory and serves as the seat of advanced motor function, social abilities, language, and problem solving.
www.medterms.com /script/main/art.asp?articlekey=11490   (336 words)

  
 Frontal lobe - Wikipedia, the free encyclopedia
Located at the front of each cerebral hemisphere, frontal lobes are positioned in front of (anterior to) the parietal lobes.
A report from the National Institute of Mental Health says a gene variant that reduces dopamine activity in the prefrontal cortex is related to poorer performance and inefficient functioning of that brain region during working memory tasks, and to slightly increased risk for schizophrenia.
Dopamine-sensitive neurons in the cerebral cortex are found primarily in the frontal lobes.
en.wikipedia.org /wiki/Frontal_lobe   (855 words)

  
 Title: Ipsilateral Involvement/Deficits in Cerebral Hemisphere Strokes
Major reasons for not detecting ipsilateral deficits in clinical practice are their relative subtlety, poor knowledge of the presence of deficits, failure to use sensitive tests, use of ipsilateral side as the reference for impairment in the hemiplegic/paretic side and the emphasis placed on contralateral in rehabilitation.
The results indicated that all cerebral hemisphere areas involved in sensorimotor functions can exert some degree of bilateral motor control and the proportion of ipsilateral to contralateral control is closely related to the degree of continuous sensory feedback required by the particular task.
The lesion depth was confounded with hemisphere of stroke.
www.umdnj.edu /idsweb/idst6400/papers/barsola.htm   (4522 words)

  
 Laterality - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-11-07)
Most humans that are right-handed prefer to draw their circles counter-clockwise and traverse building counter-clockwise.
This is thought to have come about due to a dominant brain hemisphere.
Development and disorders of lateral dominance and the development of specialised centres and functions in the left and right brain hemispheres
en.wikipedia.org /wiki/Laterality   (525 words)

  
 Lateralization of Function in Cerebral Hemispheres
The Cerebral Hemispheres are very similar in appearance, but they differ significantly in their structure.
In most cases the left hemisphere is believed to be the dominate hemisphere (4).
This injection stops of the function of the cerebral hemisphere on which ever side it was injected for about 4-8 minutes (5) which gives the doctor time to perform language test on the functioning hemisphere.
serendip.brynmawr.edu /bb/neuro/neuro98/202s98-paper1/Ball.html   (1579 words)

  
 Cerebral Vascular Disease   (Site not responding. Last check: 2007-11-07)
On the left is the middle cerebral artery of the left hemisphere.
The anterior cerebral artery supplies the inferior surface of the frontal lobe and the medial parts of the hemisphere.
The middle cerebral artery supplies the basal ganglia, deep white matter and the lateral surface of the hemisphere.
nanonline.org /nandistance/mtbi/NeuroIll/cerebvas/cerebvas.html   (404 words)

  
 Reference.com/Encyclopedia/Cerebral hemisphere
It is quite unclear that the right hemisphere has equivalent broad associations with spatial abilities, coherent form recognition, emotional recognition, holistic perception and visual face recognition.
For example, the claim that the right hemisphere is creative, whereas the left is not, is, a cornerstone of hemispheric difference mythology, especially as it is applied to management and training.
The hemispheres operate together, linked by the corpus callosum, a very large bundle of nerve fibers, and also by other smaller commissures, including the anterior commissure, posterior commissure, and hippocampal commisure.
www.reference.com /browse/wiki/Right_brain   (593 words)

  
 Coloring Therapy - Left or Right Brain   (Site not responding. Last check: 2007-11-07)
Measurements of the psychogenic cerebral field showed, that certain psychic and physical responses will result from certain functions within the cerebral hemispheres.
As a result of measurements, one discovered that the back part of the right cerebral hemisphere is especially specialized in the perception of feelings.
American laboratory tests have shown, that in mice, when the left cerebral hemisphere was temporarily deactivated with some chemicals, the production of T-lymphocites was drastically reduced (they are most important for our immune system function).
www.coloringtherapy.com /left_or_right_brain.htm   (363 words)

  
 Right cerebral hemisphere - function - Evanston Northwestern Healthcare   (Site not responding. Last check: 2007-11-07)
The right cerebral hemisphere controls movement of the left side of the body.
Depending on the severity, a stroke affecting the right cerebral hemisphere may result in functional loss or motor skill impairment of the left side of the body.
In addition, there may be impairment of the normal attention to the left side of the body and its surroundings.
www.enh.org /healthandwellness/encyclopedia/wellconnected/000242.asp   (92 words)

  
 ScI-Journal | The Question of Cerebral Hemisphere Dominance
These examples show that the right hemisphere is not completely without language ability - otherwise subjects could not successfully point or select - but it clearly lacks the left hemisphere’s ability to name and articulate what has been experienced.
This is because, according to Sperry and Ornstein’s findings, the right hemisphere (which controls the left side of the body) is ‘specialised for synthetic thinking, (i.e., bringing different things together to form a whole), particularly in the area of.
I fervently believe the right cerebral hemisphere - the dreamer, the artificer, the artist - is lost in our education system and unfortunately goes largely untaught.
www.sci-journal.org /index.php?template_type=report&id=15&htm=reports/vol4no2/v4n2a1.html&link=reports/home.php   (3369 words)

  
 roger brumback
It is noteworthy that infarcts involving the right cerebral hemisphere are frequently ore disabling than similar size lesions of the left hemisphere.
Despite the lack of words, individuals with expressive aphasia from left cerebral hemisphere lesions can often still be understood by family members, on the basis of situation-appropriate emotional vocalizations and gestures.
Individuals with normal intelligence who have lifelong difficulties with the verbal functions of the left cerebral hemisphere, presumably on the basis of neurodevelopmental abnormality, are said to have learning disabilities.
www.nldline.com /brombach.htm   (1238 words)

  
 Cerebral hemisphere   (Site not responding. Last check: 2007-11-07)
In most people, the left hemisphere of the human brain dominates, and specialises (in very broad terms) in speech, writing,language and calculation.
The right hemisphere has equivalent broad associations with spatial abilities, coherent formrecognition, visual face recognition and some aspects of music perception and production.
The hemispheres operate together, linked by the corpus callosum, avery large bundle of nerve fibers, and also by other smaller commissures, including the anterior commissure.
www.therfcc.org /cerebral-hemisphere-66364.html   (250 words)

  
 Cerebral hemisphere   (Site not responding. Last check: 2007-11-07)
Human brain viewed from above showing cerebral The front of the brain is to right.
In most people the left hemisphere of human brain dominates and specialises (in very terms) in speech writing language and calculation.
The hemispheres operate together linked by the corpus callosum a very large bundle of nerve and also by other smaller commissures including anterior commissure.
www.freeglossary.com /Cerebral_hemisphere   (380 words)

  
 Cerebral Hemodynamics and Metabolism in Patients With Symptomatic Occlusion of the Internal Carotid Artery -- Rutgers ...
Cerebral Hemodynamics and Metabolism in Patients With Symptomatic Occlusion of the Internal Carotid Artery -- Rutgers et al.
the symptomatic ICA occlusion and the asymptomatic hemisphere.
an increase in choline in the symptomatic hemisphere.
stroke.ahajournals.org /cgi/content/full/34/3/648   (3238 words)

  
 eMedicine - Middle Cerebral Artery Stroke : Article by Daniel I Slater, MD   (Site not responding. Last check: 2007-11-07)
Finally, M4 describes branches of the MCA that perfuse nearly all of the convex surface of the cerebral hemispheres aside from the frontal pole and posterior rim.
Defining cerebral dominance for left-handed individuals is more difficult, but it does appear that most left-handed patients also have a dominant left hemisphere.
Thrombotic occlusion of small and large vessels still is accepted widely as the primary etiology of all strokes, causing approximately 51% of strokes in the anterior, middle, and posterior cerebral vasculature combined; however, it is a relatively rare cause of MCA strokes.
www.emedicine.com /pmr/topic77.htm   (6770 words)

  
 UCSF - Neuroradiology Interesting Case: May, 2002
There is a roughly inverse relationship between the severity of the cortical and white-matter abnormalities and the size of the cerebral hemisphere.
Hemimegalencephaly, also known as unilateral megalencephaly, is a disorder of neuronal and glial proliferation that results in enlargement of all or part of a cerebral hemisphere.
Neuronal migration defects occur in the affected hemisphere, with areas of polymicrogyria pachygyria, and heterotopia commonly observed.
www.neurorad.ucsf.edu /previouscases/05012002.html   (656 words)

  
 THE MODERN PHRENOLOGY OF THE CEREBRAL HEMISPHERES   (Site not responding. Last check: 2007-11-07)
As to hemisphere function, the tendency is to see the left hemisphere as more concerned with focussed attention and sequential, analytical processing of unpredictable material; while the right hemisphere seems more concerned with the holistic patterns, rhythms and expectations that provide the personal background and context to action.
the cerebral hemispheres] are destroyed is that, in early life, we start with mostly similar agencies on either side.
"The idea of a duality between the hemispheres was prompted by the discovery of right-hemispheric superiority for certain skills in commissurotomized patients and was a necessary corrective to the earlier notions of the left hemisphere as the major hemisphere....
www.cycad.com /cgi-bin/Brand/quotes/q19.html   (8610 words)

  
 Sturge-Weber Disease with Repercussion on the Prenatal Development of the Cerebral Hemisphere -- Portilla et al. 23 ...
Sturge-Weber Disease with Repercussion on the Prenatal Development of the Cerebral Hemisphere -- Portilla et al.
A, Axial inversion-recovery T1-weighted image obtained when the patient was aged 3 months shows a decrease in the size of the left hemisphere in the parietal region and a pachygyric appearance of the cortex.
Although hemispheric disease in SWD is frequently complicated
www.ajnr.org /cgi/content/full/23/3/490   (1283 words)

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