Retinal Projections of &lt;i&gt;Tupaia Glis&lt;/i&gt;

Laemle, Lois K.

doi:10.1159/000125521

Cited by 58 publications

(16 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact is consistent with the observations of Laemle (1968), who reported that the retino-collicular afferent fibers penetrate into the lateral portion of the superior colliculus. Most of these fibers go through the optic layer and they are distributed, afterwards, to the rest of the layers.…”

Section: Superior Colliculussupporting

confidence: 93%

c-Fos expression in the visual system of the tree shrew (Tupaia belangeri)

Poveda¹,

Kretz²

2009

Journal of Chemical Neuroanatomy

View full text Add to dashboard Cite

Section: Superior Colliculussupporting

confidence: 93%

c-Fos expression in the visual system of the tree shrew (Tupaia belangeri)

Poveda¹,

Kretz²

2009

Journal of Chemical Neuroanatomy

View full text Add to dashboard Cite

“…Tupaia is diurnal and possesses a well-developed visual system reflecting an active life swinging in trees of the rain forest. Its oculomotor system also includes an extraordinarily well developed AOS including all the fiber tracts and nuclear components described by Hayhow et al (see Campbell et al, 1967;Laemle, 1968).…”

Section: Nonmammalian Speciesmentioning

confidence: 99%

The accessory optic system: basic organization with an update on connectivity, neurochemistry, and function

Giolli

Blanks

Lui

2006

Progress in Brain Research

143

123

View full text Add to dashboard Cite

The accessory optic system (AOS) is formed by a series of terminal nuclei receiving direct visual information from the retina via one or more accessory optic tracts. In addition to the retinal input, derived from ganglion cells that characteristically have large receptive fields, are direction-selective, and have a preference for slow moving stimuli, there are now well-characterized afferent connections with a key pretectal nucleus (nucleus of the optic tract) and the ventral lateral geniculate nucleus. The efferent connections of the AOS are robust, targeting brainstem and other structures in support of visual-oculomotor events such as optokinetic nystagmus and visual-vestibular interaction. This chapter reviews the newer experimental findings while including older data concerning the structural and functional organization of the AOS. We then consider the ontogeny and phylogeny of the AOS and include a discussion of similarities and differences in the anatomical organization of the AOS in nonmammalian and mammalian species. This is followed by sections dealing with retinal and cerebral cortical afferents to the AOS nuclei, interneuronal connections of AOS neurons, and the efferents of the AOS nuclei. We conclude with a section on Functional Considerations dealing with the issues of the response properties of AOS neurons, lesion and metabolic studies, and the AOS and spatial cognition. The accessory optic system (AOS) is formed by a series of terminal nuclei receiving direct visual information from the retina via one or more accessory optic tracts. In addition to the retinal input, derived from ganglion cells that characteristically have large receptive fields, are direction-selective and have a preference for slow moving stimuli, there are now well characterized afferent connections with a key pretectal nucleus (nucleus of the optic tract) and the ventral lateral geniculate nucleus. The efferent connections of the AOS are robust, targeting brainstem and other structures in support of visual-oculomotor events such as optokinetic nystagmus and visual-vestibular interaction. The present chapter reviews the newer experimental findings while including older data concerning the structural and functional organization of the AOS. We then consider the ontogeny and phylogeny of the AOS and include a discussion of similarities and differences in the anatomical organization of the AOS in nonmammalian and mammalian species. This is followed by sections dealing with retinal and cerebral cortical afferents to the AOS nuclei, interneuronal connections of AOS neurons, and the efferents of the AOS nuclei. We conclude with a section on Functional Considerations dealing with the issues of the response properties of AOS neurons, lesion and metabolic studies, and the AOS and spatial cognition.

show abstract

“…This fact provides an opportunity to compare the development of interlaminar spaces between layers that have segregated for presumably different functional reasons. Finally, many details of the connections, physiology, and relative cell sizes of LGN layers in the adult tree shrew are known, allowing for easy comparison of the mature and immature nucleus (Campbell et al, 1967;Carey et al, 1979;Casagrande, 1974;Casagrande et al, 1978;Casagrande and Harting, 1975;Hubel, 1975;Brauer et al, 1981;Glickstein, 1967;Harting et al, 1973;Laemle, 1968;Sherman et al, 1974;Norton et al, 1977;Tigges, 1966;Snyder and Diamond, 1968;Fitzpatrick et al, 1980;Birecree et al, 1980). In the present communication, it is our goal to define 589 the normal sequence of events leading to laminar formation in the tree shrew LGN.…”

mentioning

confidence: 99%

Early postnatal development of laminar characteristics in the dorsal lateral geniculate nucleus of the tree shrew

Brunso‐Bechtold¹,

Casagrande²

1982

J. Neurosci.

View full text Add to dashboard Cite

Three characteristics distinguish the six layers of the adult tree shrew dorsal lateral geniculate nucleus (LGN). First, interlaminar spaces divide the nucleus into cell layers. Second, input from the two eyes projects to the nucleus such that two layers (1 and 5) receive input from the ipsilateral retinal and four layers (2, 3, 4, and 6) receive input from the contralateral retina. Finally, distinct cytological features characterize individual layers. In this report, we describe the postnatal development of LGN layers in the tree shrew in terms of the development of these three characteristics. At birth, the nucleus appears homogenous in Nissl-stained sections. Thus, no interlaminar spaces are present and all cells look similar in shape, size, and staining intensity. However, autoradiographic data show that, at birth, retinal afferents are segregated in an adult-like pattern. Interlaminar spaces begin to be evident between layers innervated by opposite eyes on postnatal day 2. Several days later, interlaminar spaces between layers innervated by the same eye (i.e., the borders of layer 3) appear, while the others continue to widen. Although some cytological maturation begins before interlaminar space formation, it is not until interlaminar spaces are apparent that features such as differential staining intensity and cell size can be used to distinguish individual layers. The results suggest that the three characteristics that define LGN layers in the tree shrew may be temporally separate events in the developing nucleus. Thus, retinal afferents are segregated prior to interlaminar space formation which, in turn, is initiated prior to final maturation of the cytological features that characterize the cell layers. This may indicate a degree of developmental independence among these maturational events.

show abstract

Retinal Projections of <i>Tupaia Glis</i>

Cited by 58 publications

References 3 publications

c-Fos expression in the visual system of the tree shrew (Tupaia belangeri)

c-Fos expression in the visual system of the tree shrew (Tupaia belangeri)

The accessory optic system: basic organization with an update on connectivity, neurochemistry, and function

Early postnatal development of laminar characteristics in the dorsal lateral geniculate nucleus of the tree shrew

Contact Info

Product

Resources

About