Abstract
Electroretinographic responses (ERGs) have been recorded from the cornea of the little owl (Athene noctua) in response to single light flashes and to alternating sinusoidal gratings (pattern) at different levels of light adaptation. Both flash- and pattern-evoked ERGs show scotopic as well as photopic components. The pattern evoked ERG is spatially tuned with tuning functions which shift towards lower frequencies by reducing the mean luminance. The retinal acuity is about 6c/deg at 2.3 log cd/m2 and decreases progressively by reducing the mean luminance. No pattern ERG can be recorded beyond -6. 7 log cd/m2 at any spatial frequency. The pattern ERG amplitude decreases progressively by reducing the contrast. The extrapolated contrast threshold is about 1%. Acuity and contrast sensitivity ERG values are in the range of those obtained by operant techniques in other species with duplex retinae such as owls and cats.
| Original language | English |
|---|---|
| Pages (from-to) | 1693-1698 |
| Number of pages | 6 |
| Journal | Vision Research |
| Volume | 29 |
| Issue number | 12 |
| DOIs | |
| State | Published - Jan 1 1989 |
| Externally published | Yes |
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Keywords
- Flash ERG
- Little owl
- Luminance levels
- Pattern ERG
ASJC Scopus subject areas
- Ophthalmology
- Sensory Systems
Cite this
The electroretinogram of the little owl (Athene noctua). / Porciatti, Vittorio; Fontanesi, Gigliola; Bagnoli, Paola.
In: Vision Research, Vol. 29, No. 12, 01.01.1989, p. 1693-1698.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The electroretinogram of the little owl (Athene noctua)
AU - Porciatti, Vittorio
AU - Fontanesi, Gigliola
AU - Bagnoli, Paola
PY - 1989/1/1
Y1 - 1989/1/1
N2 - Electroretinographic responses (ERGs) have been recorded from the cornea of the little owl (Athene noctua) in response to single light flashes and to alternating sinusoidal gratings (pattern) at different levels of light adaptation. Both flash- and pattern-evoked ERGs show scotopic as well as photopic components. The pattern evoked ERG is spatially tuned with tuning functions which shift towards lower frequencies by reducing the mean luminance. The retinal acuity is about 6c/deg at 2.3 log cd/m2 and decreases progressively by reducing the mean luminance. No pattern ERG can be recorded beyond -6. 7 log cd/m2 at any spatial frequency. The pattern ERG amplitude decreases progressively by reducing the contrast. The extrapolated contrast threshold is about 1%. Acuity and contrast sensitivity ERG values are in the range of those obtained by operant techniques in other species with duplex retinae such as owls and cats.
AB - Electroretinographic responses (ERGs) have been recorded from the cornea of the little owl (Athene noctua) in response to single light flashes and to alternating sinusoidal gratings (pattern) at different levels of light adaptation. Both flash- and pattern-evoked ERGs show scotopic as well as photopic components. The pattern evoked ERG is spatially tuned with tuning functions which shift towards lower frequencies by reducing the mean luminance. The retinal acuity is about 6c/deg at 2.3 log cd/m2 and decreases progressively by reducing the mean luminance. No pattern ERG can be recorded beyond -6. 7 log cd/m2 at any spatial frequency. The pattern ERG amplitude decreases progressively by reducing the contrast. The extrapolated contrast threshold is about 1%. Acuity and contrast sensitivity ERG values are in the range of those obtained by operant techniques in other species with duplex retinae such as owls and cats.
KW - Flash ERG
KW - Little owl
KW - Luminance levels
KW - Pattern ERG
UR - http://www.scopus.com/inward/record.url?scp=0024833801&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024833801&partnerID=8YFLogxK
U2 - 10.1016/0042-6989(89)90151-X
DO - 10.1016/0042-6989(89)90151-X
M3 - Article
C2 - 2631390
AN - SCOPUS:0024833801
VL - 29
SP - 1693
EP - 1698
JO - Vision Research
JF - Vision Research
SN - 0042-6989
IS - 12
ER -