Retinal afferents and efferents of an infrared sensitive snake, Crotalus viridis
The retinal afferents and efferents were examined in Crotalus viridis. Retinofugal fibers were traced by injecting horseradish peroxidase (HRP) or tritiated leucine into the eye, or by removing the eye and staining degenerating axons with silver methods. Terminations were seen contralaterally in the suprachiasmatic nucleus, the dorsal and ventral lateral geniculate nuclei (extensive), the pretectal nuclei, including the nucleus posterodorsalis (a very heavy input), the nucleus lentiformis mesencephali, nucleus geniculatus pretectalis, and nucleus pretectalis, the superficial layers of the optic tectum, including the stratum zonale, the stratum opticum, the stratum griseum et fibrosum centrale and the upper portion of stratum griseum centrale, and the basal optic nucleus. Ipsilateral input reaches the intermediate portion of the dorsal lateral geniculate nucleus, a small portion of the pretectal nucleus and nucleus posterodorsalis, and the basal optic nucleus (very minimally). Retinopedal fibers were traced with the HRP method. The cell bodies lie in the ventral thalamus within the nucleus of the ventral supraoptic decussation. These neurons project primarily to the contralateral retina, but some more rostrally located neurons project to the ipsilateral retina.
- Research Organization:
- Medical Sciences Program, Indiana University School of Medicine, Bloomington
- OSTI ID:
- 5672958
- Journal Information:
- J. Morphol.; (United States), Vol. 170:1
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
EYES
ANATOMY
INFRARED RADIATION
RADIOSENSITIVITY EFFECTS
NERVE CELLS
NERVES
PEROXIDASES
RETINA
SNAKES
TRITIUM COMPOUNDS
ANIMAL CELLS
ANIMALS
BODY
BODY AREAS
CARBOXYLIC ACIDS
ELECTROMAGNETIC RADIATION
ENZYMES
FACE
HEAD
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LABELLED COMPOUNDS
NERVOUS SYSTEM
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANS
OXIDOREDUCTASES
PORPHYRINS
RADIATIONS
REPTILES
SENSE ORGANS
SOMATIC CELLS
VERTEBRATES
551000* - Physiological Systems
560153 - Radiation Effects on Animals- Invertebrates- (-1987)