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J Repérant

Publications and source records attributed to J Repérant.

At least 127 records · Page 7Linked to original sources
PubMed1977

[Autoradiographic analysis of the primary visual projections of a diurnal predator (Buteo buteo L.)].

Radioautographic analysis of the optic system of a Common Buzzard (Buteo buteo L.) show hypothalamic (Meier's areas 1, 2 and 3), thalamic (nuclei lateralis anterior, geniculatus lateralis ventralis, dorsolateralis anterior), pretactal (nuclei geniculatus lateralis pretectalis--or Kuhlenbeck's geniculatus lateralis dorsalis--superficialis synencephali, griseus tectalis and area pretectalis), tegmental (nucleus ectomammillaris) and tectal visual projections. A general survey of Common Buzzard optic structures suggest a certain preponderancy of tectofugal system on thalamofugal system. Centrifugal visual system is reduced.

Animals↗
PubMed1976

[Problems posed by the interpretation of peroxidase labelling of various neurons in Cyprinidae].

The origin of a centrifugal visual pathway in Cyprinids could not be demonstrated with the technique involving the labelling of cell bodies by retrograde transport of Horseradish Peroxidase. The hypothalamic labelling following intraocular injection of HRP is localized in neurosecretory structures which take up the enzyme that has passed into the circulatory system. Identical results were obtained following direct intracardiac injection. Thus extreme caution must be taken in attempting to interpret HRP results.

Animals↗
PubMed1976

Retinal projections in cyprinid fishes: a degeneration and radioautographic study.

The retinal projections of three species of cyprinid fish (Cyprinus macrolepidotus, Cyprinus carpio, Rutilus rutilus) were examined with Nauta and Fink-Heimer methods following enucleation and with radioautography following intraocular injection of [3H]-L-proline. Optic tract axons cross completely in the optic chiasma and are distributed to the hypothalamus (nucleus opticus hypothalamicus pars magnocellularis), the thalamo-pretectal region (11 distinct primary optic centers), and the tectum opticum (stratum fibrosum et griseum superficiale, stratum griseum centrale and stratum album centrale). No accessory optic tract was found. The experimental studies on visual projection of various teleosts are reviewed and discussed.

Animals↗
PubMed1976

[Centrifugal fibers in the human retina].

The examination of 16 human retina stained in toto according to the Gallego method (1953) demonstrated the presence of centrifugal optic fibers. These fibers appear as large argyrophilic axons and can be traced as of the papille, amongst the centripetal optic fibers. The centrifugal fibers show a high degree of ramification which may extend over a quarter of the total retinal surface and terminate in the internal plexiform layer. Elsewhere the existence of perivascular and intravascular axon terminals as well as short axon ganglion nerve cells were demonstrated.

Humans↗
PubMed1975

[Retinal projections in Caiman sclerops. Autoradiographic study].

The retinal projections in Caiman sclerops have been re-examined using the radio-autographic method for tracing axonal pathways. Following the intraocular injection of a mixture of [3H]proline and [3H]fucose, label transported in the rapid phase of axonal flow was found only on controlateral side to the injection in the nuceli, supra-opticus, ovalis, geniculatus lateralis pars dorsalis and pars ventralis, geniculatus pretectalis, lentiformis mesencephali, griseus tectalis, opticus tegmenti and in the superficial layers of the tectum opticum (layers 1 to 6). Label transported in the slow phase confirms the absence of an ipsilateral optic component. No controlateral retinofugal fasicule crossing over in the posterior commissure as previously described in this species using the Nauta method (3) was observed. In comparison with degeneration study in Caiman sclerops (3) the radio-autographic results demonstrated more accurately the sites of termination of retinofugal fibers.

Alligators and Crocodiles↗