RELATION BETWEEN THE ELECTRORETINOGRAM (ERG) AND SINGLE CELL ACTIVITIES IN THE RETINA
Abstract
By means of minute micropipettes with the tip diameter less than 0.1 micron, it became possible to record intracellularly the responses of single neutrons in the frog's retina. The Group-I responses which are obtained from the most superficial retinal layer comprise impulses of either on-, off-, or on/off-type, but areACCOMPANIED BY NO DISCERNED SLOW POTENTIAL CHANGE. The Group-II responses, which arise from a layer lying some 70 to 80 micron deeper than the depth at which the Group-I responses are recorded, also comprise impulse discharges similar to the Group-I responses, but they are featured by superimposition of the impulses on conspicuous slow potential changes resembling the ERG or some components of it. No impulses are detectable beyond the depth at which the Group-II responses are recorded, but there exists a layer from which a sustained negative potential is obtained in response to illumination (Group-III). The origin of the Group-I responses was identified to be single optic nerve fibers. The Group-III response is considered to be of the same nature as the S-potential which was first observed by Svaetichin in the fish retina. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 21, 1961
- Accession Number
- AD0268604
Entities
People
- Tsuneo Tomita
Organizations
- Keio University