Hemispheric dominance

Crow TJ. 1997. Schizophrenia as failure of hemispheric dominance for language. TINS 20 339-343. 

Figure 2 Seasonal and long-term trends in concentrations, and 5 0 values of atmospheric CO2 measured at high latitudes in the northern (Barrow, Alaska) and southern (American Samoa) hemispheres by the NOAA/CMDL-CU flask network (www.cmdl.noaa.gov/ccgg/index.html). The terrestrial biosphere, concentrated in the northern hemisphere, dominants the seasonal cycle. Fossil fuel emission dominates the long-term trends in CO2 and in...

Knel P, Dehaene S (2(X)9). Beyond hemispheric dominance brain regions underlying the joint lateralization of language and arithmetic to the left hemisphere. J Cc n Neurosci... 

Georgiadis et al. Stroke 2002 33(6) 1584-1588 Nonblinded prospective hemicraniectomy for nondominant and cooling for dominant hemisphere 19 of 36 tx with hypothermia Hypothermia to 33°C with cooling blankets or endovascular technique on clinical course in pts with >2/3 MCA infarct 12% vs. 47% mortality for surgery vs. hypothermia. Hypothermia with increased complications of hypotension and electrolyte abnormalities. Both tx with longer ICU course... 

Many clinicians are concerned about the use of DC for dominant hemisphere strokes, but Kastrau et al. found in a retrospective review of 14 dominant hemisphere stroke patients with aphasia that significant improvement (13/14 patients) was achieved in these preselected younger patients who underwent early poststroke DC. In contrast, a retrospective study by Foerch et al. found that older patients fared quite poorly in terms of functional outcome and quality of life, especially in those with severe neurological deficit at admission. These results were replicated by Curry et al., who also found that younger patients also were more likely to require reoperations for continued herniation. Uhl et al. ° found no prognostic value to the side of infarction in their analysis of 188 patients who underwent DC for massive hemispheric infarction. 

Kastrau F, Wolder M, Huber W, Block F. Recovery from aphasia after hemicraniectomy for infarction of the speech-dominant hemisphere. Stroke 2005 36(4) 825-829. 

Now that we have a simple model for the continuum spectrum of the stars based around the Planck curve, the temperature and the luminosity, we can make some observations and classifications of the stars. There are some constellations that dominate the night sky in both the northern and southern hemispheres and even a casual look should inspire wonder. Star hopping in the night sky should lead to the simplest observation not all stars have the same colour. A high-quality photograph of the constellation of Orion (see page 2 of the colour plate section) shows stars... 

Mineralogy and soil geochemistry along the W-E transect reflect both the influence of soil parent materials and effect of hemispheric climate gradients. The quartz dilution effect described by Bern (2009) dominates the distribution of a number of elements Al is given as an example in Figure 2. 

The production of illite from chemical weathering occurs at all latitudes. It dominates the clay mineral assemblage in the North Atlantic and North Pacific Ocean, particularly at 40° reflecting aeolian transport by the westerlies (Figure 14.11). In the southern hemisphere, the input of illite by the westerlies is diluted by a large input of authigenic montmorillonite in the South Pacific and Indian Oceans and in the South Atlantic by a large input of kaolinite. 

Temperate grassland, deciduous forest, and chaparral In the northern hemisphere, temperate land is comprised from 30° N to approximately the Arctic circle. In the southern hemisphere, it is limited to the southernmost parts of Australia and America. Everywhere it is dominated, in decreasing extent, by grassland, deciduous and rain forests, and chaparral (Fig. 6.1). 

Atmospheric conditions over the sampling site were variable, and several different air masses passed by- On 16 March the weather map of the northern hemisphere shows two high pressures, one over Lake Baikal and the other over South Korea, so that the sampling site was just in between the air was calm, cloudy, and conducive for pollutants to build up. Later the north high pressure moved southwards. By midday of 17 March the sampling site was dominated by high pressure. At that time air flow over the site was mainly from the northwest, the wind speed was 3 meters/second, and the water vapor content was very low. The sky was clear, and vertical dilution was effective. 

Memory disturbances typically include anterograde amnesia (i.e., the inability to recall newly learned material) and retrograde amnesia (i.e., the inability to recall previously learned material). Both types can present as deficits in either the dominant or nondominant cerebral hemispheres (i.e., verbal and nonverbal anterograde and retrograde amnesia). Some patients also complain of loss of autobiographical memories. It is often difficult, however, to sort out the relative contributions to memory disturbances from the induced seizures, the anesthesia, or the depressive illness itself. 

Halliday AM, Davison K, Browne MW, et al. A comparison of the effects on depression and memory of bilateral ECT and unilateral ECT to the dominant and non-dominant hemispheres. BrJ Psychiatry 1968 114 997-1012. 

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