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 SIGHTMARK SM18012 TWLIGHT 35 X 42MM DIGITAL NIGHT VISION MONOCULAR $312.54 Time Remaining: 27d 17h 35m Buy It Now for only: $312.54 |
 THE SHARPER IMAGE TSI 5500 5500 ARTEMIS GEN 1 NIGHT VISION MONOCULAR $278.30 Time Remaining: 16h 55m Buy It Now for only: $278.30 |
 Sightmark Ghost Hunter Night Vision Monocular w IR Illuminator 5x60 SM14074 $279.99 Time Remaining: 25d 13h 49m Buy It Now for only: $279.99 |
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 FIREFIELD FF24063 4 X 50MM NIGHT VISION MONOCULAR $159.99 Time Remaining: 26d 4h 10m Buy It Now for only: $159.99 |
 Sightmark Sm18013 Twilight 5 X 50mm Digital Night vision Monocular $322.30 Time Remaining: 14d 10h 25m Buy It Now for only: $322.30 |
 Sightmark Sm18012 Twlight 35 X 42mm Digital Night vision Monocular $288.85 Time Remaining: 14d 10h 25m Buy It Now for only: $288.85 |
 GT 14 Night Vision Monocular Generation 2+ BRAND NEW $1,799.00 Time Remaining: 12d 5h 33m Buy It Now for only: $1,799.00 |
has any research been done onthe monocular vision of frogs?
Jardon B, Bonaventure N.
Centre de Neurochimie du C.N.R.S. Strasbourg, France.
The frog horizontal monocular optokinetic nystagmus (OKN) is asymmetrical, the temporal-nasal (T-N) stimulation being the sole stimulation efficient to evoke the reflex, the nasal-temporal (N-T) component being almost absent. Coil recordings showed that, in adult animals, prolonged monocular visual deprivation by unilateral eyelid suture provoked the appearance of the N-T component. The OKN became symmetrical, reacting for both directions of stimulation. Microinjection of either gamma-aminobutyric acid (GABAA) agonist 4,5,6,7-tetrahydroisoxazolo (5,4-C) Pyridin-3-ol (THIP) or muscarinic cholinergic antagonist atropine into the nucleus lentiformis mesencephali, the pretectal mesencephalic structure involved in OKN, transiently abolished the presence of N-T component. This result suggests that the phenomenon of visual plasticity, occurring after a week of monocular deprivation, can be due, at least partially, to reduction in pretectal GABAergic inhibition, and to concomitant activation of cholinergic muscarinic receptors.
PMID: 1584460 [PubMed - indexed for MEDLINE]
Night Vision Monocular