The Bushbaby Optic Nerve: Fiber Count and Fiber Diameter Spectrum

Abstract

The number, percent myelinated, density, and size distributions of optic nerve axons in the bushbaby, Galago crassicaudatus, were estimated from a partial areal survey of cross-sectioned tissue examined by electron microscopy. The average of the data obtained by two experimenters yielded a total fiber estimate of 384,500 (+ or - 19,200). Unmyelinated axons comprised 2.8 percent of the population. The fiber density between peripheral and central optic nerve samples was homogeneous and estimated to be 376 fibers per 1000 sq microns. Axon size distributions were distributed unimodally from 0.17 - 4.3 microns (mode=0. 7). Unmyelinated axons ranged in size from 0.17-1,24 microns (mode=0.41). The comparative implications of these results are discussed in view of the bush-baby as a model for studies of human scotopic vision. (JHD)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA221658

Entities

People

  • Jim E. Fulbrook
  • Loretta Peterson

Organizations

  • United States Army Aeromedical Research Lab

Tags

DTIC Thesaurus Topics

  • Biological Sciences
  • Birds
  • Brain
  • Cells
  • Electron Microscopes
  • Electron Microscopy
  • Health Services
  • Laboratory Animals
  • Military Research
  • Nerve Fibers
  • Nerve Tissue
  • Nervous System
  • Neurology
  • Neurons
  • Neurosciences
  • Optic Nerve
  • Peripheral Nervous System

Readers

  • Materials Science and Engineering.
  • Neuroscience
  • Statistical inference.

Technology Areas

  • Microelectronics