[Morphology of retinomotor response of Oncorhynchus masou fry exposed in magnetic field and red light].

Morfologiia (Saint Petersburg, Russia) · 2004 · Mixed · Low evidence

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MixedLow evidencePaper 3660

Study snapshot

PublicationMorfologiia (Saint Petersburg, Russia) · 2004

Study typeanimal

Reported directionMixed

Evidence ratingLow

Abstract

The retinomotor response of Oncorhynchus masou fry was studied following their experimental exposure to constant magnetic field, red light and their combination. Photoreceptor and pigment epithelium reactions to red light had a mesopic character. The mesopic state of retina after exposure of fishes to magnetic field in darkness differed from that after exposure to red light by the reaction of a pigment epithelium (PE). Exposure to magnetic field after red light resulted in the summation of these two effects. As rods are adapted to twilight, and cones are adapted to light, combined functioning of two perception mechanisms is possible, which is never found in normal conditions. After exposure to red light that followed the action of magnetic field, retinomotor reaction reflected the physiological dysfunction, with no functioning of either rods or cones. PE was actively participating in reactions to changes of magnetic field. The assumption that the cells of PE of fish retina can act as a light-dependent magnetoreceptor, is discussed.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionmixed

PopulationOncorhynchus masou fry (fish)

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthLowConfidence: 66% · Peer reviewed: yes

Main findings

Retinomotor responses were assessed after exposure to a constant magnetic field, red light, and their combination. Magnetic field exposure in darkness produced a mesopic retinal state that differed from red light exposure by the pigment epithelium reaction; magnetic field exposure after red light showed summation of effects, while red light after magnetic field was associated with retinomotor responses described as physiological dysfunction with no functioning of rods or cones. The pigment epithelium was described as actively participating in reactions to changes of magnetic field, and a possible light-dependent magnetoreceptor role was discussed.

Outcomes measured

Retinomotor response
Photoreceptor reactions (rods/cones)
Pigment epithelium (PE) response
Retinal mesopic state/physiological dysfunction

Limitations

No exposure parameters for the magnetic field (e.g., field strength) reported in the abstract
No sample size reported in the abstract
Outcome measures and quantitative results are not provided in the abstract
Animal study; relevance to humans not addressed

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "constant magnetic field",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Oncorhynchus masou fry (fish)",
  "sample_size": null,
  "outcomes": [
    "Retinomotor response",
    "Photoreceptor reactions (rods/cones)",
    "Pigment epithelium (PE) response",
    "Retinal mesopic state/physiological dysfunction"
  ],
  "main_findings": "Retinomotor responses were assessed after exposure to a constant magnetic field, red light, and their combination. Magnetic field exposure in darkness produced a mesopic retinal state that differed from red light exposure by the pigment epithelium reaction; magnetic field exposure after red light showed summation of effects, while red light after magnetic field was associated with retinomotor responses described as physiological dysfunction with no functioning of rods or cones. The pigment epithelium was described as actively participating in reactions to changes of magnetic field, and a possible light-dependent magnetoreceptor role was discussed.",
  "effect_direction": "mixed",
  "limitations": [
    "No exposure parameters for the magnetic field (e.g., field strength) reported in the abstract",
    "No sample size reported in the abstract",
    "Outcome measures and quantitative results are not provided in the abstract",
    "Animal study; relevance to humans not addressed"
  ],
  "evidence_strength": "low",
  "confidence": 0.66,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "constant magnetic field",
    "red light",
    "retinomotor response",
    "retina",
    "pigment epithelium",
    "photoreceptors",
    "Oncorhynchus masou",
    "fish fry",
    "magnetoreception"
  ],
  "suggested_hubs": [
    {
      "slug": "animal-studies",
      "weight": 0.9,
      "reason": "Experimental exposure study in fish fry assessing retinal responses to magnetic field and light."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 15839248

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