(1) While the diameter of the red rod outer segments varies with their location along the vertical meridian of the retina, the incisure number also changes similarly.
(2) Schmidt-Lantermann incisures were more abundant in thick and heavily myelinated fibers than in thin and lightly myelinated fibers.
(3) At 12 h and 24 h after crush, however, no ovoids were apparent and the number of incisures present was determined from teased fibres by light microscopy using oil immersion.
(4) The Schmidt-Lanterman incisures are formed in the phase of "loose" myelin at 15-17 weeks of prenatal development with the formation of nodes of Ranvier.
(5) In spite of easy access, inserting the fibula into the incisure can be difficult in the case of bony or ligamentous injuries of the distal tibiofibular syndesmosis.
(6) Consequently they appear in transverse section as sectoral incisures (occupying less than half the circumference) and in longitudinal section as asymmetric incisures (involving one side only of the myelin sheath).
(7) It is concluded, that changes of incisural ultrastructure are sensitive indicators of human neuropathies offering clues to the type of the underlying pathomechanism.
(8) Taxol-induced abnormalities in Schwann cells did not prevent their ability to produce myelin sheaths, although the accumulation of microtubules between myelin lamellae caused swellings of Schmidt-Lanterman incisures and paranodal myelin loops.
(9) We report a patient with a progressive, predominantly sensory neuropathy and a IgM kappa M-protein that binds to Schmidt-Lantermann incisures.
(10) In this report we show that the microfilament components, F-actin and spectrin, co-localize with MAG in periaxonal membranes, Schmidt-Lanterman incisures, paranodal myelin loops, and inner and outer mesaxons of myelinating Schwann cells.
(11) Incision of the tentorium prior to removal of a tumor when it invades the incisural hiatus may have merit.
(12) Incubation of nerve with Ca2+ and the divalent cation ionophores A23187 or ionomycin, causes a prompt vesiculation of the myelin at the paranodes and Schmidt-Lanterman incisures.
(13) Within the lesser curvature there is an increasing incidence from the oesophageal end towards pylorus, with maximal incidence in the incisural area (1).
(14) The fact that the supratentorial perfusion pressure was the only parameter which did not differ significantly under the different experimental conditions suggests that the mechanism responsible for the respiratory arrest is local brain tissue ischemia, probably near the tentorial incisure.
(15) The basal membrane of outer hair cells is distinguished from that of inner hair cells by plaques consisting of cross-hatched incisures in the external membrane leaflet.
(16) The formation of mature Schmidt-Lanterman incisure is completed in the second foetis period.
(17) NaK ATPase levels increased and HCO3 ATPase decreased in incisural, body and fundic mucosa which had intestinal metaplasia and atrophic gastritis.
(18) One is the incisural sclerosis theory by Penfield and his associates and the other is the Ammon's horn sclerosis theory by Sano and Malamud.
(19) Paranodal myelin and some Schmidt-Lanterman incisures were the first regions of the sheath to show an increase in PLA2 staining post-crush, areas where the first ultrastructural changes occur in myelin after trauma, with staining of compact myelin closely following.
(20) These are 1) the presence of 'atypical' Schmidt-Lanterman incisures, 2) irregularities of the nodal and internodal termination of Schwann cell cytoplasm and 3) the presence of non-myelinated segments without associated Schwann cell processes, but covered by basal lamina.
Notch
Definition:
(n.) A hollow cut in anything; a nick; an indentation.
(n.) A narrow passage between two elevation; a deep, close pass; a defile; as, the notch of a mountain.
(v. t.) To cut or make notches in ; to indent; also, to score by notches; as, to notch a stick.
(v. t.) To fit the notch of (an arrow) to the string.
Example Sentences:
(1) The Notch locus in Drosophila encodes a transmembrane protein required for the determination of cell fate in ectodermal cells.
(2) Recent reports have indicated the usefulness of nuclear grooves (clefts or notches) as an additional criterion for the diagnosis of papillary thyroid carcinoma in fine needle aspirates; most of these studies were carried out on alcohol-fixed material stained with the Papanicolaou stain or with hematoxylin and eosin, which yield good nuclear details.
(3) For histometric evaluation, the radicular notches were used as reference points.
(4) Conversely, in 66 of 80 pregnancies the absence of a notch was associated with the livebirth of an infant beyond 32 weeks gestation, with a birthweight above the 5th centile.
(5) The left subclavian artery was prominent in 33 cases, signs indicating a collateral circulation (rib notching, internal mammary artery) were present in 26 cases.
(6) Notched tympanograms were typical of neonatal ears for a 220-Hz probe tone.
(7) Radiographic manifestations include endosteal sclerosis of the neurocranium with loss of the diploë, osteosclerosis and hyperostosis of the mandible with absence of the normal antegonial notches, endosteal sclerosis of the diaphyses of long bones (including metacarpals and metatarsals), and osteosclerosis of the pelvis.
(8) For the experimental studies, fractures of the jaw bone in terms of oblique osteotomies from angle to sigmoid notch of the mandible of the Malaysian monkeys were made by using #700 fissure bur and reduced and fixed them in terms of interosseous wiring.
(9) Lymphadenopathies were classified by the criteria proposed by Yoshinaka et al., type I: poorly-defined borders, diffuse internal echoes; type II: well-defined borders, diffuse internal echoes; type III: well-defined borders, notchings, strong internal echoes.
(10) Here, we examine a group of six recessive mutations, the facets (fa, fa3, fag, fag-2, fafx and fasw), which affect eye and optic lobe morphology and have been previously shown to be associated with the insertion of transposable elements into an intronic region of Notch.
(11) Another frequent finding was partial or total obstruction at the tentorial notch, often in combination with reduced or absent activity along the superior sagittal sinus.
(12) In one patient, the fibrous band extended from the distal pole of the patella to the intracondylar notch, tethering the patella inferiorly.
(13) This thin flap, usually extending from the hyoid bone to the sternal notch at the central part of the anterior neck, provides a skin island of about 4 by 8 cm.
(14) The chest roentgenographic findings in Takayasu's arteritis include widening of the ascending aorta, contour irregularities of the descending aorta, arotic calcifications, pulmonary arterial changes, rib notching, and hilar lymphadenopathy.
(15) In two cases the epidermoid, located mainly in the cerebello-pontine angle, spread into the middle cranial fossa; in three the epidermoid extended from the parasellar cisterns to the posterior cranial fossa; in six patients the epidermoid, enlarging the tentorial notch, occupied extensively both cranial fossae.
(16) This post-transcriptional regulation is suppressed in embryos mutant for the genes Notch and Delta; where all cells expressing RNA accumulate protein.
(17) The femoral intercondylar notch width was measured in 93 patients with chronic anterior cruciate ligament (ACL) insufficiency (Group 1), in 62 patients with an acute tear of the ACL (Group 2), and in 38 fresh anatomic specimen knees (Group 3).
(18) Deep notch cases had more retrusive mandibles with a shorter corpus, smaller ramus height, and a greater gonial angle than did shallow notch cases.
(19) The acicular alpha structure has been shown to exhibit the best fatigue properties for Ti-6A1-4V alloy in the notched condition.
(20) The anatomical relations of the semilunar notch of the ulna were studied in radiographs, taken in a strict lateral view, from 100 patients with elbow dislocations.