Hundreds of thalamic axons ramify within a column of cat visual cortex; yet each layer 4 neuron receives input from only a fraction of them. We have examined the specificity of these connections by recording simultaneously from layer 4 simple cells and cells in the lateral geniculate nucleus with spatially overlapping receptive fields (n = 221 cell pairs). Because of the precise retinotopic org...

Given the proposed role of catecholamines in controlling cortical plasticity in the cat (Kasamatsu, T., J. D. Pettigrew, and M. Ary (1979) J. Comp. Neurol. 185: 163-182), we were interested in whether evidence of such control also could be found in the dorsal lateral geniculate nucleus. We undertook geniculate cell size measurements in 26 normal or monocularly deprived cats, 23 of which had bee...

50KODA, J., Subcortical structures controlling lateral geniculate transmission, Tohoku J. exp. ivied., 76 (1962) 350-364. 6 SAKAKURA, H., Spontaneous and evoked unitary activities of cat lateral geniculate neurons in sleep and wakefulness, Jap. J. Physiol., 18 (1968) 23-42. 7 STERIADE, M., AND DEMETRESCU, M., Unspecific system of inhibition and facilitation of potentials evoked by intermittent ...

The neuronal connections from the retina to the dorsal lateral geniculate nucleus (dLGN) are characterized by a high specificity. Each retinal ganglion cell diverges to connect to a small group of geniculate cells and each geniculate cell receives input from a small number of retinal ganglion cells. Consistent with the high specificity of the connections, geniculate cells sharing input from the...

Seven dogs were tested for their sensitivity to pure tones following lesions of the brachium of the inferior colliculus and medial geniculate body. Bilateral section of the brachium of the inferior colliculus consistently resulted in an average hearing loss of as much as 37 dB in the midrange of the animals' audiograms. Lesions of the medial geniculate appear to produce a similar hearing loss i...

Neurons in trigeminal and geniculate ganglia extend neurites that share contiguous target tissue fields in the fungiform papillae and taste buds of the mammalian tongue and thereby have principal roles in lingual somatosensation and gustation. Although functional differentiation of these neurons is central to formation of lingual sensory circuits, there is little known about electrophysiologica...

We examined the role of ERK pathway in the segregation of retinal ganglion cell (RGC) afferents in the dorsal-lateral geniculate nucleus (dLGN). Our results demonstrate that the blockade of P-ERK abolishes the eye-specific segregation in the dLGN providing evidence that ERK is crucial for the development of retino-geniculate connections. In particular we show that ERK mediates this process both...

Two marine halacarids, Copidognathus levicostatus n. sp. and C. vicinus Bartsch, 1997, belonging to the gibbus group, have been recorded based on both sexes from microhabitat of intertidal sublittoral rocks coast South Korea. Is characterized by a combination features, as follows: absence areolae with rosette pores all dorsal ventral plates, presence short frontal process, pair costae raised na...

SEVERAL RECENT STUDIES HAVE SHOWN that sleep with EEG slow waves is periodically interrupted by brief episodes of sleep with low-voltage fast EEG activity and rapid eye movements (REMs) (7, 8, 18, 19). During these episodes, single waves or groups of two to three waves appear in the lateral geniculate body in association with the REMs (6, 21). Each wave has an amplitude of 100-200 pV., a durati...