Viability of retinal ganglion cells after optic nerve crush in adult rats.

The response of retinal ganglion cells to optic nerve crush was examined in the hooded rat. Intracranial nerve crush produces a transient shrinkage of the retinal ganglion cells during the first several weeks postoperatively but partial recovery of cell size then appears to occur. This transient response is considered to be a direct response to axotomy.

Tinea versicolor: a scanning electron microscopic view.

Tinea versicolor (TV) infections were studied in the scanning electron microscope utilizing several different sampling and preparatory techniques. Scalpel scrapings provided information only on the morphology of individual spores and hyphae, while biopsies and cyanoacrylate adhesive slides demonstrated the topography of the disease as well as providing information on how the infection spreads and recurs. Critical point drying was necessart to maintain the fine ultrastructure previously described.