The organization of nerve fiber bundles, stained by microelectrode injection of horseradish peroxidase, was examined in the retina of the owl monkey. Fibers were traced across the retina in whole mounts and serial sections to evaluate their retinotopic order. Long nasal fibers showed little tendency to wander among bundles but were distributed randomly within the bundles near the disc. Long arc...

In the present paper we study bundles equipped with extra homotopy conditions, in particular so-called n-bundles. It is shown that (under some condition) the classifying space of 1-bundles is the double coset space of some finite dimensional Lie group. We also establish some relation between our bundles and C*-algebras.

The organization of the retinal nerve fiber layer of the cynomolgus monkey was studied by electron microscopy. Nerve fiber size spectra were obtained from measurements of every fiber in enlarged montages of selected bundles. Variation in spectra among nasal, arcuate, and papillomacular bundles was examined, and variation of spectra of a given bundle as it crossed the retina was determined. Amon...

We prove that all smooth sphere bundles that admit fiberwise 1/4-pinched metrics are induced bundles of vector bundles, so their structure groups reduce from DIFF(Sn) to O(n + 1). This result implies the existence of many smooth Sn-bundles over Sk that do not support strictly 1/4-pinched positively curved Riemannian metrics on their fibers.

Interactions of multiple molecular motors with bundles of actin and microtubule filaments form the basis for many cytoskeletal processes including axonal growth, muscle contraction, cell division and platelet formation. Continuum models based on generalized diffusion equations have been suggested to quantify the dynamics of such active bundles. In highly cross-linked and densely packed filament...