The subcortical distribution of optic fibers in <i>Saimiri sciureus</i> (Squirrel monkey)

Glees, P.

doi:10.1002/cne.901310205

Cited by 66 publications

(6 citation statements)

References 25 publications

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“…Both the dorsal and lateral terminal nuclei of the squirrel monkey have previ ously been shown to receive retinal input [Campos-Ortega and Glees, 1967;Giolli and Tiges, 1970;Tigges and Tigges, 1970;Tigges and O 'Steen, 1974]. The autoradio graphic results of the present report reveal that the input to the lateral terminal nuc leus is bilateral, with the ipsilateral path way being significantly less prominent than the crossed pathway.…”

Section: Retinal Projections To the Aossupporting

confidence: 59%

“…Surprisingly, a small, though distinct, reti nal pathway terminates within the medial terminal nucleus of the squirrel monkey. With the exception of one report [Gillilan, 1941], previous descriptions of the AOS in primates have failed to identify either the nucleus [Giolli, 1963;Lin and Giolli, 1979] or any retinal input to the region [Giolli, 1963;Campos-Ortega and Glees, 1967;Campos-Ortega and De V. Clüver, 1968;Campbell, 1969;Tigges andTigges, 1969, 1970;Giolli and Tigges, 1970;Hendrickson et al, 1970;Tigges and O 'Steen, 1974;Tigges et al, 1977;Lin and Giolli, 1979]. Recently, however, a small superficial la belled retinal pathway was described as extending from the lateral terminal nu cleus toward the medial terminal nucleus [/taya and Van Hoesen, 1983], although there was no indication that the retina in deed terminated within the medial termi nal nucleus.…”

Section: Retinal Projections To the Aosmentioning

confidence: 94%

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Pretectal Complex and Accessory Optic System of Primates (Part 2 of 2)

Weber¹

1985

Brain Behav Evol

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In the present report, conflicting results regarding the pretectal complex and accessory optic system of primates are discussed. Subsequently data are presented and used in an attempt to clarify some of the issues. The retinal projections to the pretectal complex and accessory optic system of the tree shrew and squirrel monkey were examined using anterograde autoradiographic methods. These data demonstrate that, following intraocular injections of ³H-proline or ³H-fucose in the tree shrew, silver grains are apparent bilaterally over the pretectal olivary nucleus and the anterior and posterior pretectal nuclei and contralaterally over the nucleus of the optic tract. Following intraocular injections of the ³H-tracer in squirrel monkeys, dense transported label is observed bilaterally over the pretectal olivary nucleus and the nucleus of the optic tract with sparse label over the posterior and medial pretectal nuclei. In both the tree shrew and squirrel monkey, a differential retinal projection is observed, chiefly contralaterally, to all accessory optic terminal nuclei (i.e., the dorsal, lateral and medial terminal nuclei).

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Section: Retinal Projections To the Aossupporting

confidence: 59%

Section: Retinal Projections To the Aosmentioning

confidence: 94%

Pretectal Complex and Accessory Optic System of Primates (Part 2 of 2)

Weber¹

1985

Brain Behav Evol

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“…As the W-analogous cells are phylogenetically older, it is possible that their fibres cross more completely than those of the M and P cells. W-analogous fibres to the accessory optic system [10,24] or to the suprachiasmatic nucleus [19] apparently do so. In cats, 40-60% of the W fibres from temporal retina cross in the chiasm [34,52].…”

Section: Hypothetical Projection Of Pupillomotor Fibresmentioning

confidence: 99%

Naso-temporal asymmetry and contraction anisocoria in the pupillomotor system

Schmid¹,

Wilhelm²,

Wilhelm³

2000

Graefe's Arch Clin Exp Ophthalmol

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RAPD in optic tract damage or pretectal lesions cannot be explained by the only slightly more sensitive nasal retina. Considerably more input would be needed from the contralateral than from the ipsilateral retina into the optic tract. The nearly equal direct and consensual pupil reactions when stimulating the temporal retina suggest an input of temporal retina to both sides of the pretectum. Such a crossing of temporal fibres may take place in the chiasm.

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“…The neuronal basis of the consensual pupillary response has also not been completely clarified. Due to a partial decussation in the optic chiasm in frontal‐eyed mammals, retinal ganglion cells synapse bilaterally in the OPt (cat: Laties and Sprague, ; Kanaseki and Sprague, ; Berman, ; Koontz et al, ; Distler and Hoffmann, ; monkey: Campos‐Ortega and Glees, ; Giolli and Tigges, ; Pierson and Carpenter, ; Tigges et al, ; Benevento and Standage, ; Hutchins and Weber, ). This comprises a primary neuroanatomical basis for the consensual pupillary light reflex.…”

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confidence: 99%

Central pupillary light reflex circuits in the cat: I. The olivary pretectal nucleus

Sun

May

2014

J of Comparative Neurology

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The central pathways subserving the feline pupillary light reflex were examined by defining retinal input to the olivary pretectal nucleus (OPt), the midbrain projections of this nucleus, and the premotor neurons within it. Unilateral intravitreal wheat germ agglutinin conjugated horseradish peroxidase (WGA-HRP) injections revealed differences in the pattern of retinal OPt termination on the two sides. Injections of WGA-HRP into OPt labeled terminals bilaterally in the anteromedian nucleus, and to a lesser extent in the supraoculomotor area, centrally projecting Edinger-Westphal nucleus and nucleus of the posterior commissure. Labeled terminals, as well as retrogradely labeled multipolar cells, were present in the contralateral OPt, indicating a commissural pathway. Injections of WGA-HRP into the anteromedian nucleus labeled fusiform premotor neurons within the OPt, as well as multipolar cells in the nucleus of the posterior commissure. Connections between retinal terminals and the pretectal premotor neurons were characterized by combining vitreous chamber and anteromedian nucleus injections of WGA-HRP in the same animal. Fusiform shaped, retrogradely labeled cells fell within the anterogradely labeled retinal terminal field in OPt. Ultrastructural analysis revealed labeled retinal terminals containing clear spherical vesicles. They contacted labeled pretectal premotor neurons via asymmetric synaptic densities. These results provide an anatomical substrate for the pupillary light reflex in the cat. Pretectal premotor neurons receive direct retinal input via synapses suggestive of an excitatory drive, and project directly to nuclei containing preganglionic motoneurons. These projections are concentrated in the anteromedian nucleus, indicating its involvement in the pupillary light reflex.

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The subcortical distribution of optic fibers in Saimiri sciureus (Squirrel monkey)

Cited by 66 publications

References 25 publications

Pretectal Complex and Accessory Optic System of Primates (Part 2 of 2)

Pretectal Complex and Accessory Optic System of Primates (Part 2 of 2)

Naso-temporal asymmetry and contraction anisocoria in the pupillomotor system

Central pupillary light reflex circuits in the cat: I. The olivary pretectal nucleus

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