Definitions
from The Century Dictionary.
- In anatomy, situated alongside or next to a center, centrum, or central part: specifically applied to a fissure and a gyrus of the cerebrum alongside the central or Rolandic fissure.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Adjacent to the
centre
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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I got an MRI of her lumbar spine which showed focal right-sided paracentral disk protrusion at T12L1, but no stenosis or cord compression.
Archive 2008-02-01 1 Dinosaur 2008
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I got an MRI of her lumbar spine which showed focal right-sided paracentral disk protrusion at T12L1, but no stenosis or cord compression.
Clinical Case: Leg Pain (Part 1) 1 Dinosaur 2008
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The Motor Tract (Fig. 764), conveying voluntary impulses, arises from the pyramid cells situated in the motor area of the cortex, the anterior central and the posterior portions of the frontal gyri and the paracentral lobule.
IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord 1918
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The largest pyramidal cells are found in the upper part of the anterior central gyrus and in the paracentral lobule; they are often arranged in groups or nests of from three to five, and are named the giant cells of Betz.
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In the former situation they may exceed 50μ in length and 40μ in breadth, while in the paracentral lobule they may attain a length of 65μ.
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The motor area occupies the anterior central and frontal gyri and the paracentral lobule.
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The posterior part of this gyrus is sometimes marked off by a vertical sulcus, and is distinguished as the paracentral lobule, because it is continuous with the anterior and posterior central gyri.
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The centers for the lower limb are located on the uppermost part of the anterior central gyrus and its continuation on to the paracentral lobule; those for the trunk are on the upper portion, and those for the upper limb on the middle portion of the anterior central gyrus.
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These two gyri, together with the paracentral lobule, were long regarded as constituting the motor areas of the hemisphere; but Sherrington and Grunbaum have shown128 that in the chimpanzee the motor area never extends on to the free face of the posterior central gyrus, but occupies the entire length of the anterior central gyrus, and in most cases the greater part or the whole of its width.
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Dr.W. L. Worcester's microscopic examination showed rather unusual degrees of nerve cell pigmentation (precentral and paracentral).
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