AIMS To compare the levels of conus medullaris in preterm and term neonates; to show the time of ascent to normal; and to evaluate the babies with low conus medullaris levels for tethered cord syndrome. METHODS Levels were assessed using ultrasonography in 41 preterm and 64 term neonates. RESULTS In the preterm group the conus medullaris level in one infant (2.4%) was below L4. In three inf...

ARMOUR, J. A., J. B. PACE, AND W. C. RANDALL. kWreZationship of architecture and function uf the right ventricle. Am. J. Physiol. 2N3(1): ,)174-179. 1970.-The sequence of contraction and augmentation patterns in contractile force of the sinus and conus regions of the right ventricle were analyzed under control, vagal, and sympathetic stimulation as well as norepinephrine infusion states. The no...

In patients with occlusion of the left anterior descending coronary artery (LAD) or right coronary artery (RCA), the conus artery, which arises at or near the origin of the RCA, often serves as a principal source of collateral circulation. Coronary arteriograms in 508 adult patients revealed that in 80.5% the conus artery was well visualized on the RCA angiogram, but that in 19.5% it was not ad...

BACKGROUND Prenatal magnetic resonance (MR) imaging demonstration of the normal spinal cord and the conus medullaris location has not been well studied. We compared balanced fast field echo (bFFE) with single-shot turbo spin-echo (SSh-TSE) MR sequences for visualizing the normal spinal cord and position of conus medullaris in fetuses. METHODS This retrospective study was approved by the Insti...

THE FEEDING BEHAVIOR of various members of the genus Conus has been described (Kohn, 1956a, 1959, 1968; Kline, 1956; Nybakken, 1967). Piscivorous species of Conus, for which feeding behavior has been recorded, attack by extending their proboscises. From this extension a radular tooth used but once is injected into the prey, which is later swallowed. The feeding behavior of Conus geographus Linn...

BACKGROUND Normal displacement of the conus medullaris with unilateral and bilateral SLR has been quantified and the "principle of linear dependence" has been described. PURPOSE Explore whether previously recorded movements of conus medullaris with SLRs are i) primarily due to transmission of tensile forces transmitted through the neural tissues during SLR or ii) the result of reciprocal move...

The genus Conus comprises approximately 700 species of venomous marine cone snails that are highly efficient predators of worms, snails, and fish. In evolutionary terms, cone snails are relatively young with the earliest fossil records occurring in the Lower Eocene, 55 Ma. The rapid radiation of cone snail species has been accompanied by remarkably high rates of toxin diversification. To shed l...