Summary
The three-dimensional fiber pathways of the accessory optic system in the rabbit, cat, dog and monkey were studied in whole-mounted preparations of the diencephalon and the midbrain, without sectioning, by anterograde labeling of retinal axons with horseradish peroxidase (HRP). HRP histochemical studies on alternate serial coronal sections were also performed. The rabbit accessory optic system exhibited two fasciculi (the inferior fasciculus, and the superior fasciculus consisting of the anterior fibers and the posterior fibers) and three terminal nuclei (the medial terminal nucleus, and the anterior and posterior porcions of the lateral terminal nucleus), but lacked the dorsal terminal nucleus. In the cat and dog, only the posterior fibers of the superior fasciculus were detected. The inferior fasciculus and the anterior fibers of the superior fasciculus were absent. The medial terminal nucleus and the posterior portion of the lateral terminal nucleus were commonly observed in the cat and dog. The cat accessory optic system possessed the dorsal terminal nucleus, and the dog accessory optic system possessed the anterior portion of the lateral terminal nucleus. The monkey (Macaca fuscata) accessory optic system consisted of the posterior fibers of the superior fasciculus, but blacked the inferior fasciculus and the anterior fibers of the superior fasciculus. Most of the posterior fibers terminated in the well-developed posterior portion of the lateral terminal nucleus located on the upper surface of the cerebral peduncle. A small number of posterior fibers projected to the poorly-developed medial terminal nucleus. Based on these findings, species differences in the mammalian accessory optic system were discussed.
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References
Ban T, Oki T, Zyo K (1965) A experimental study on the accessory optic system in the rabbit. Okajimas Fol Anat Jap 40:625–645
Campos-Ortega JA, Glees P (1967) The subcortical distribution of optic fibers in Saimiri sciureus (Squirrel monkey). J Comp Neurol 131:131–142
Campos-Ortega JA, Cluver PF, De V (1968) The distribution of retinal fibers in Galago crassicaudatus. Brain Res 7:487–489
Erickson RG, Cotter JR (1980) Reinvestigation of the accessory optic system in the rabbit and cat using autoradiography. Anat Rec 196:53A-54B
Erickson RG, Cotter JR (1983) Uncrossed retinal projections to the accessory optic nuclei in rabbits and cats. Exp Brain Res 49:143–146
Fujisawa H, Watanabe K, Tani N, Ibata Y (1981) Retinotopic analysis of fiber pathways in amphibians. I. The adult newt Cynops pyrrhogaster. Brain Res 206:9–20
Garey LJ, Powell TPS (1968) The projection of the retina in the cat. J Anat 102:189–222
Gillilan LA (1941) The connections of the basal optic root (posterior accessory optic tract) and its nucleus in various mammals. J Comp Neurol 74:367–408
Giolli RA (1961) An experimental study of the accessory optic tracts (transpeduncular tracts and anterior accessory optic tracts) in the rabbit. J Comp Neurol 117:77–95
Giolli RA (1963) An experimental study of the accessory optic system in the cynomolgus monkey. J Comp Neuol 121:89–107
Giolli RA, Guthrie MD (1969) The primary optic projections in the rabbit. An experimental degeneration study. J Comp Neurol 136:99–126
Hayhow WR (1959) A experimental study of the accessory optic fiver system in the cat. J Comp Neurol 113:281–34
Hayhow WR (1966) The accessory optic system in the marsupial phalanger, Trichosurus vulpecula. J Comp Neurol 126:653–672
Hayhow WR, Webb C, Jervie A (1960) The accessory optic fiber system in the rat. J Comp Neurol 115:187–216
Hendrickson A, Wilson ME, Toyne MJ (1970) The distribution of optic nerve fibers in Macaca mulatta. Brain Res 23:425–427
Holbrook JR, Schapiro H (1974) The accessory optic tract in the dog; a retinoentopeduncular pathway. J Hirnforsch 15:365–377
Laemle LK, Noback CR (1970) The visual pathways of the Lorisid Lemurs (Nyciticebus coucang and Galago crassicaudatus). J Comp Neurol 138:49–62
Laties AM, Sprague JM (1966) The projection of optic fibers to the vissual centers in the cat. J Com Neurol 127:35–70
Lin H, Ingram WR (1972) A anterior component of the accessory optic system of the cat, with evidence for the absence of reticuloretinal fibers. Exp Neurol 37:37–49
Mesulam M-M (1978) Tetramethyl benzidine for horseradish peroxidase neurohistochemistry: A non-carcinogenic blue reaction-product with superior sensitivity for visualizing neural afferents and efferents. J Histochem Cytochem 26:106–117
Murabe Y, Fujisawa H, Terubayashi H, Ibata Y (1983) A wholemount horseradish peroxidase study of the retinal central projection of normal and monocular rats. Anat Embryol 168:151–158
Rioch DM (1931) Studies on the diencephalon of carnivora. Part III. Certain myelinated fiber connections of the diencephalon of the dog (Canis familaris) cat (Felis demestica) and aevisa (Crossarchus obscurus). J Comp Neurol 53:319–388
Takahashi ES, Hickey TL, Oyster CW (1977) Retinogeniculate projections in the rabbit: An autoradiographic study. J Comp Neurol 175:1–12
Terubayashi H, Fujisawa H (1984) The accessory optic system of rodents: A whole-mount HRP study. J Comp Neurol 277:285–295
Tigges M, Tigges J (1969) Retinal projection in Galago crassicaudatus (Primates). Anat Rec 163:274
Tigges J, Bos J, Tigges M (1977) An autoradiographic investigation of the subcortical visual system in chimpanzee. J Comp Neurol 172:367–380
Tigges J, O'steen WK (1974) Termination of retinofugal fibers in squirrel monkey: a re-investigation using autoradiographic methods. Brain Res 79:489–495
Tigges J, Tigges M (1968) The accessory optic system in Galago crassicaudatus (Primates). Anat Rec 160:441
Tigges J, Tigges M (1969a) The accessory optic system in Erinaceus (Insectivora) and Galago (Primates). J Comp Neurol 137:59–70
Tigges J, Tigges M (1969b) The accessory optic system and other optic fibers of the squirrel monkey. Folia primat 10:245–262
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Terubayashi, H., Fujisawa, H. The accessory optic system of the rabbit, cat, dog and monkey: a whole-mount HRP study. Anat Embryol 177, 285–295 (1988). https://doi.org/10.1007/BF00315835
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DOI: https://doi.org/10.1007/BF00315835