scholarly journals White Fiber

2020 ◽  
Author(s):  
Keyword(s):  
White Fiber

Subcortical Stimulation with Tip of Ultrasound Aspirator

2021 ◽  
Author(s):  
Henry Colle ◽  
David Colle ◽  
Bonny Noens ◽  
Bob Dhaen ◽  
Giovanni Alessi ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Current Practice ◽  
Tumor Resection ◽  
Intracranial Lesion ◽  
Eloquent Areas ◽  
Fiber Tracts ◽  
Current Transmission ◽  
Subcortical Stimulation ◽  
Tissue Trauma ◽  
White Fiber

Background During resection of intrinsic brain tumors in eloquent areas, particularly under awake mapping, subcortical stimulation is mandatory to avoid irreversible deficits by damaging white fiber tracts. The current practice is to alternate between subcortical stimulation with an appropriate probe and resection of tumoral tissue with an ultrasound aspiration device. Switching between different devices induces supplementary movement and possible tissue trauma, loss of time, and inaccuracies in the localization of the involved area. Objective To use one device for both stimulation as well as a resecting tool. Methods The tip of different ultrasound aspiration devices is currently used for monopolar current transmission (e.g., for vessel coagulation in liver surgery). We use the same circuitry for monopolar subcortical stimulation when connected with the usual stimulator devices. Results We have applied this method since 2004 in over 500 patients during tumor resection with cortical and subcortical stimulation, mostly with awake language and motor monitoring. Conclusion A method is presented using existing stimulation and wiring devices by which simultaneous subcortical stimulation and ultrasonic aspiration are applied with the same tool. The accuracy, safety, and speed of intrinsic intracranial lesion resection can be improved when subcortical stimulation is applied.

scholarly journals Resistance of cotton genotypes to Sclerotinia sclerotiorum by the straw and oxalic acid tests

2018 ◽  
Vol 53 (11) ◽  
pp. 1281-1284
Author(s):  
Leandro Henrique Mundim Aguiar ◽  
Larissa Barbosa de Sousa ◽  
Lísias Coelho ◽  
Ernane Miranda Lemes ◽  
Leonardo Humberto Silva e Castro ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Gossypium Hirsutum ◽  
Sclerotinia Sclerotiorum ◽  
White Mold ◽  
Susceptible Genotype ◽  
Breeding Programs ◽  
Resistance Sources ◽  
Colored Cotton ◽  
Cotton Genotypes ◽  
White Fiber

Abstract: The objective of this work was to evaluate the efficiency of the straw and oxalic acid tests to identify resistance levels of white and colored cotton (Gossypium hirsutum) genotypes to white mold (Sclerotinia sclerotiorum). Ten genotypes were evaluated: five with colored fiber, four with white fiber, and a white-fiber susceptible genotype. The genotypes MAB-1 with white fiber and MAC-2 with colored fiber were the most resistant to white mold, according to the immersion in oxalic acid and straw tests, respectively. These genotypes can be recommended as resistance sources for breeding programs. Both assessed tests are complementary to each other; however, the straw test is more efficient in evaluating the resistance of cotton genotypes to white mold.

scholarly journals THE ULTRASTRUCTURE OF Z DISKS FROM WHITE, INTERMEDIATE, AND RED FIBERS OF MAMMALIAN STRIATED MUSCLES

1973 ◽  
Vol 57 (2) ◽  
pp. 261-277 ◽  
Author(s):  
R. W. D. Rowe
Keyword(s):  
Fiber Types ◽  
Spatial Relationships ◽  
Striated Muscles ◽  
Disk Model ◽  
Mammalian Muscle ◽  
Physiological Differences ◽  
White Fiber

The Z disk ultrastructure of white, intermediate, and red fibers from mammalian muscle is examined. Three models are proposed that explain the differences between the three types of Z disk. The three models are all based on the same concept, i.e., looping filaments from both sides of the Z disk. The differences between the models are in terms of the spatial relationships of adjacent loops within the Z disk. In the white fiber Z disk model all the loops from one side of the Z disk are on the same plane. In intermediate fibers there are two planes of loops from both sides of the Z disk, whereas in red fibers there are three planes of loops from both sides. The implications of these three structures are discussed in relation to known physiological differences between the fiber types.

scholarly journals The Superior Frontal Longitudinal Tract: Connection between the Dorsal Premotor and the Dorsolateral Prefrontal Cortices

2020 ◽  
Author(s):  
Mudathir Bakhit ◽  
Masazumi Fujii ◽  
Ryo Hiruta ◽  
Masayuki Yamada ◽  
Kenichiro Iwami ◽  
...  
Keyword(s):  
Spatial Relationship ◽  
Spatial Location ◽  
Superior Longitudinal Fasciculus ◽  
Point Patterns ◽  
Dorsolateral Prefrontal ◽  
Fiber Dissection ◽  
Structural Connection ◽  
Termination Point ◽  
White Fiber ◽  
Prefrontal Cortices

AbstractThe structural connection between the dorsal premotor (PMd) and the lateral prefrontal cortices (DLPFC) has been revealed, in a few studies, as the frontal longitudinal system (FLS). This study conducted a tractography analysis and a limited, postmortem, white-fiber dissection to investigate the superior FLS tract (SFLT) and analyze both its symmetry and termination point patterns. An analysis of spatial location, termination points, laterality, and correlation with the subjects’ gender or handedness was performed. SFLT was constructed in 100% of right and 88% of left hemispheres. The tracts exhibited variable patterns in different subjects in their posterior terminations. Additionally, the SFLT was found to possess a complex spatial relationship with the adjacent bundles. The SFLT was revealed successfully in two right hemispheres, where the posterior terminations were found to originate in the PMd, and its posterior terminations being totally separate from the superior longitudinal fasciculus.

scholarly journals White fiber dissection of brain; the internal capsule: a cadaveric study

2010 ◽  
Author(s):  
Chowdhury Forhad ◽  
Haque Mohammod ◽  
Sarkar Mainul ◽  
Ara Shamim ◽  
Islam Mohammod
Keyword(s):  
Internal Capsule ◽  
Cadaveric Study ◽  
Fiber Dissection ◽  
White Fiber

scholarly journals Retrosigmoid Approach: A Simple and Safe Way to Resect Intrinsic Pontomedullary Lesions

2019 ◽  
Vol 81 (03) ◽  
pp. 223-231
Author(s):  
José M. González-Darder ◽  
Pau Capilla-Guasch ◽  
Luis Real-Peña
Keyword(s):  
Decision Making ◽  
Cranial Nerves ◽  
Radical Resection ◽  
Retrosigmoid Approach ◽  
Functional Improvement ◽  
Partial Recovery ◽  
Fiber Tracts ◽  
Microsurgical Resection ◽  
High Degree ◽  
White Fiber

Objectives The main objective of this article is to describe a simple and safe protocol for the microsurgical management of ventrally located intrinsic pontomedullary lesions based on the retrosigmoid approach, cortectomy performed utilizing safe entry zones of the pons and medulla, and a delicate microsurgical resection. The intraoperative protocol includes redundant procedures that provide security in decision-making during surgery. Design A prospective series of 11 cases is presented. All patients were studied following the same clinical and imaging workup. A regular retrosigmoid craniotomy surgical approach was utilized. The peritrigeminal area in the pons and the olivary area in the medulla were considered as the safe entry zones. Neuronavigation of the white fiber tracts and electrophysiological monitoring were used as intraoperative aids to locate the lesions, the safe entry zones, and the placement of the cortectomy. Results Six lesions were pontine, two medullary, and the remaining six pontomedullary. Eight lesions were cavernomas, while the remaining three tumors. Overall, we obtained a postoperative functional improvement in the affected cranial nerves in 90.1% of the patients and a total or partial recovery of long ascending or descending pathway symptoms in 72.3% of the patients. All the patients were satisfied with the procedure and the results. Conclusions Radical resection of ventral intrinsic pontomedullary lesions displays a high degree of intraoperative reliability, and a good clinical result is possible using simple surgical procedures. The anatomical references are the first element in the decision-making process during surgery.

scholarly journals GROWTH AND GAS EXCHANGES OF COTTON UNDER WATER SALINITY AND NITROGEN-POTASSIUM COMBINATION

2020 ◽  
Vol 33 (2) ◽  
pp. 470-479
Author(s):  
ADAAN SUDÁRIO DIAS ◽  
GEOVANI SOARES DE LIMA ◽  
HANS RAJ GHEYI ◽  
LAURIANE ALMEIDA DOS ANJOS SOARES ◽  
PEDRO DANTAS FERNANDES
Keyword(s):  
Electrical Conductivity ◽  
Salt Stress ◽  
Stomatal Conductance ◽  
Plant Height ◽  
Biomass Accumulation ◽  
Gas Exchanges ◽  
Pot Experiments ◽  
Dry Biomass ◽  
Cotton Plants ◽  
White Fiber

ABSTRACT The objective of this study was to evaluate the growth and gas exchanges of white-fiber cotton cv. BRS 368 RF irrigated using waters with increasing levels of salinity under nitrogen-potassium combination in a greenhouse in the municipality of Campina Grande-PB, Brazil. The treatments were distributed in randomized blocks, corresponding to five levels of electrical conductivity of water - ECw (0.7; 2.2; 3.7; 5.2 and 6.7 dS m-1) and four combinations of fertilization nitrogen-potassium - N/K2O (70/50, 100/75, 130/100, 160/125% of the recommended dose for pot experiments), with three replicates. Irrigation with water of electrical conductivity from 0.7 dS m-1 compromised the growth and gas exchanges of cotton cv. BRS 368 RF, and dry biomass of leaf, stem and root were the most sensitive variables to salt stress. The nitrogen-potassium combination of 100/75% of the recommendation for pot experiments resulted in higher growth in plant height, but the highest stomatal conductance of cotton cv. BRS 368 RF was recorded in plants cultivated with 75/50% N/K2O, at 77 days after sowing. The variation in the N/K2O combination did not interfere with biomass accumulation in cotton plants. The treatment with water of lowest salinity (0.7 dS m-1) and the combination of 160/125% of the recommendation promoted greater leaf expansion, at 107 days after sowing.

Red and White Fiber Content and Associated Post-Mortem Properties of Seven Porcine Muscles

1965 ◽  
Vol 30 (6) ◽  
pp. 969-976 ◽  
Author(s):  
G. R. BEECHER ◽  
R. G. CASSENS ◽  
W. G. HOEKSTRA ◽  
E. J. BRISKEY
Keyword(s):  
Fiber Content ◽  
Post Mortem ◽  
White Fiber

White Fiber Dissection of Brain

2014 ◽  
Vol 24 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Forhad H. Chowdhury ◽  
Atul H. Goel ◽  
Abhida Shah ◽  
Sukhdeep Jhawar ◽  
Mohammod Raziul Haque ◽  
...  
Keyword(s):  
Fiber Dissection ◽  
White Fiber
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