Showing papers in "Brain Research in 1978"

TL;DR: Observations indicate for the first time the existence of relatively direct conduction lines by which interoceptive information might be conveyed to limbic forebrain structures.

TL;DR: The present report demonstrates the existence of a marked sexual difference in the volume of an intensely staining cellular component of the medial preoptic nucleus (MPON) of the rat and shows a possible morphological basis for the sexual differentiation of brain function.

TL;DR: These normative data for the intact rat can be directly compared to the taste reactivity of neurally ablated preparations which do not spontaneously feed or drink and can be utlized in determining the neural substrates necessary for the execution and regulation of ingestive behavior.

TL;DR: The hypothesis that the hippocampus has an important role in the processing of information about spatial location, and that normal performance on this task requires an intact hippocampal circuitry, is supported.

TL;DR: A cyto- and myeloarchitectonic parcellation of the superior temporal sulcus and surrounding cortex in the rhesus monkey has been correlated with the pattern of afferent cortical connections from ipsilateral temporal, parietal and occipital lobes, and the results suggest a definite organization of this region.

TL;DR: Evidence is presented that long-lasting enhancement of perforant path synapses following high-frequency activity is a cooperative process requiring coactivity of a considerable number of fibers.

TL;DR: A reasonable explanation for the failure of earlier immunocytological studies to detect somal GAD in certain GABAergic neurons is that the axonal transport of GAD appears to occur at a sufficiently rapid rate to limit the somal concentration of G AD to low, undetectable levels.

TL;DR: Observations strongly support the concept that substance P acts as a primary sensory transmitter and the administration of capsaicin, which is known to desensitize peripheral receptors responding to painful chemogenic stimuli, virtually abolishes the fluoride-resistant acid phosphatase activity of the substantia gelatinosa.

TL;DR: Investigation of cortical projections in the rhesus monkey suggests a previously undescribed principle of organization within the telencephalon, namely, that areas of cerebral cortex having reciprocal cortico-cortical connections, while having unique overall patterns of projection to the caudate nucleus, project, in part, to one and the same region of the nucleus.

TL;DR: Based on the similarities in the ingestion and rejection responses of decerebrate and intact rats, it appears that discriminative responses to taste result from integrative mechanisms complete within, or caudal to, the midbrain.

TL;DR: It is concluded that hip position and the contralateral step cycle phase are two important factors determining the initiation of swing in one leg.

TL;DR: Hippocampal unit responses were recorded throughout classical conditioning of the rabbit nictitating membrane response to a tone conditioned stimulus using a corneal air-puff unconditioned stimulus, revealing a rapidly developing increase in cell discharges within the first block of paired trials.

TL;DR: D dopamine (DA)-containing and other output neurons of the substantia nigra (SN) wer identified by antidromic stimulation from postulated target nuclei, the caudate-putamen, the thalamus, the cortex and the pontine reticular formation to constitute a second, non-DA, fast-conducting nigrostriatal pathway.

TL;DR: Rat cortical neurons from 15 day embryos are grown in dissociated cell culture and maintained in vitro for 8--12 weeks and develop into forms which resemble mature cortical neurons in situ, stain with silver and exhibit passive and active electrophysiological properties similar to those of cortical neurons.

TL;DR: The ability to elicit an orientationselective inhibitory effect from beyond the classic receptive field limits strongly suggests an intracortical origin for the inhibitory input.

TL;DR: The organization of the catecholamine innervation in the frontal lobe of the rat neocortex has been studied by means of the glyoxylic acid fluorescence method in combination with lesions and retrograde tracing of horseradish peroxidase to distinguished three dopaminergic terminal systems.

TL;DR: The results suggest that the selective modulation of nociceptive input at the level of the spinal cord can be mediated by a supraspinal system or systems physiologically distinct from those involved in analgesia produced by the administration of opiates.

TL;DR: Depolarization shifts in CA1 neurons during epileptogenesis did not behave like 'giant EPSPs' but rather were complexes to which depolarization spike after-potentials, fast prepotentials, and underlying slow depolarizing events all contributed.

TL;DR: Testing whether mere group living (social stimulation) can account for the significant differences in measures of brain anatomy and brain chemistry that develop between rodents housed in groups in enriched environments and rodents housed singly in restricted environments found this hypothesis to be inadequate.

TL;DR: [3H]muscimol is displaced, stereospecifically, only by those drugs and amino acids which are known to neurophysiologically interact with the synaptic GABA receptor but is unaffected by agents which activate or inhibit other neurotransmitter receptors.

TL;DR: The non-spatial memory deficits that have been found after unrestricted lateral prefrontal lesions are due mainly to damage below the principal sulcus in the inferior prefrontal cortex, which appears so far to be limited largely to the spatial modality.

TL;DR: It is suggested that a large number of striatoentopeduncular and striatonigral fibers are GABAergic, the latter arising preferentially from the posterior part of caudate-putamen.

TL;DR: It was concluded that some trigeminal ganglion neurones store, and might release, SP at their axon terminal in the medulla oblongata and at their sensory terminals in the skin.

TL;DR: 5-HT may be a mediator of raphe-spinal actions but may have presynaptic inhibitory actions coupled with postsynaptic excitatory effects, and NA could mediate some descending inhibition of nociceptive neurones.

TL;DR: The observed synaptic relationships could provide a morphological substrate that is compatible with an inhibitory surround system in the substantia gelatinosa and support the concept that GABAergic axon terminals are involved in the synaptic circuits which produce presynaptic inhibition and presyaptic facilitation of the primary afferent input to the dorsal spinal cord.

TL;DR: Preliminary results of a series of experiments are reported in which it is confirmed that impulses are indeed generated in the cut end of the axons themselves and that ongoing activity may be patterned and that its incidence depends markedly upon the time interval since the lesion.