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R. A. Groat, W. F. Windle and H. W. Magoun

that even severe concussions could be produced without calling upon the maximum output of the apparatus. This meant hitherto unavailable controllability of concussions. Monkey 6 . A bipolar electrode was placed in the facial nucleus (response: eyelid closure). The remodeled hydraulic apparatus was used and the cannula was in the parietal bone. The first five blows produced no concussion and only a slight startle response. The force applied was increased successively by closing by degrees the needle escape valve in the hydraulic system. The sixth blow was more

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William Feiring, Emanuel H. Feiring and Leo M. Davidoff

bone by osteoblasts may be active, or the process may appear quiescent with evidence of extensive old remodelling.” A series of cranial osteomas comparable to the localized osteomas of Eden was reported by Echlin. 12 These involved the external surface of the cranium, most often the frontal bone. Spongy and eburnated, as well as intermediary forms, were encountered. It was stressed by the author that these several types represented different stages of the same process, all apparently arising from the deeper layers of the periosteum. The eburnated tumors were

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Harvey Gass

hemisphere and later in the other hemisphere. Moreover, it was found to collect in the liver. The higher nervous activity laboratory had evidently been recently remodeled and outfitted with new equipment. A soundproof room was available in order to have available ideal Pavlovian conditions. A new electroencephalographic machine of Soviet manufacture was available and capable of high-frequency records which traced simultaneously the electroencephalogram, the electrocardiogram and respiratory records and had a two-channel oscillographic attachment. There was also available

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William J. German

, M. Rates of growth and of remodeling as factors in the genesis of vascular and osseous lesions of odoratism in rats. J. Embryol. exp. Morph. , 1958 , 6 : 270 – 283 . Gillman , T., and Hathorn , M. Rates of growth and of remodeling as factors in the genesis of vascular and osseous lesions of odoratism in rats. J. Embryol. exp. Morph. , 1958, 6: 270–283. 16. Hamre , C. J. , and Yeager , V. L. Influence of denervated muscles on exostoses of rats fed a sweet-pea diet. Arch. Path. , 1958 , 65

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A. L. Sahs

bifurcations. Hassler stated, “As is obvious from the results obtained from the experiments with models, pits were formed regularly at those sites which are assumed to correspond to media defects at the points of branching of arteries. The formation of cushions occurred at those sites which are thought to correspond to intima cushions. The results seem to indicate that media defects occur at the points of greatest strain of the arterial wall. The results tend to agree with the assumption that media defects and intima cushions are the products of a passive remodelling of the

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H. Verbiest and H. D. Paz Y Geuse

, used for packing this gap, may be expected to take place during this period of bedrest. After mobilization these patients had an adjustable plastic cervical collar supporting chin and occiput, with shoulder pieces and attachment to the upper chest. The remodeling of the Kieler spongious grafts in our patients is still under investigation and will be compared in due time with the results of the use of combined Kieler cortical-spongious grafts in another, new series of patients. Case Material Of 439 cases of cervical spondylosis treated during the past 5

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Galera G. Rafael and Davut Tovi

operation at different levels, it is not possible to enlarge effectively the congenitally narrow spinal canal found in a great number of these cases. Fig. 2. Preoperative x-ray ( left ) and 3-month postoperative x-ray ( right ) showing the postoperative collapse of the bone graft between C5–6 and the increased anterior angulation of the cervical spine. We suggest that anterior interbody fusion can be used to stabilize the cervical spine and, as described by Robinson, et al. , 17 to induce the remodeling of bony spurs, but that it should be followed at a

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Experimental Hydrocephalus

Part 2: Gross Pathological Findings in Acute and Subacute Obstructive Hydrocephalus in the Dog and Monkey

Thomas H. Milhorat, Ronald G. Clark and Mary K. Hammock

studies of hydrocephalus are few, but it is generally held that it takes as long as several weeks or even months for marked changes in ventricular size and remodelling of cerebral contour to develop. 1, 2, 4, 6, 7 The current study examines the early pathological findings in experimentally-produced obstructive hydrocephalus. These early findings are of considerable interest, for it is likely that the manner in which the pathological process evolves is revealed in the acute rather than the chronic stages of the condition, and also that the sequence of these changes may

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Donald F. Pochyly

Subsequent experience in evaluating these skills revealed the need to further define the latter two skills. 2. Orthopedic Instruments a. Simple b. Complex c. Power tools d. Remodeling tools 3. Insertion of Implants a. Simple b. Complex The use of orthopedic instruments was thus divided into four categories on the basis of the complexity of the skill required for the use of that instrument. Simple instruments are those which are used singly and have no moving parts. Complex instruments are those which have moving parts but are powered

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Robert L. McLaurin, Emily Isaacs and H. Paul Lewis

disproportion and its accompanying subdural fluid constitute an indication for shunting, cranial remodeling, or other surgical procedure unless there is associated intracranial hypertension. The development of membranes in response to a subdural hematoma has long been recognized, and surgery for removal of the membranes has been undertaken for at least two reasons. The original concept that membranes restrict brain growth has been largely abandoned. The second reason for removal of membranes is based on the notion that they are responsible for continued reaccumulation of