Ontogeny of interhemispheric evoked potentials in the rat: Significance of myelination of the corpus callosum

Seggie, Janet; Berry, Martin

doi:10.1016/0014-4886(72)90148-3

Cited by 132 publications

(47 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CC displays a significant variety in terms of myelination (Aboitiz, 1992). In rats, the fraction of myelinated fibres is zero at birth, then it gradually increases to 53% at 300 days post-conception (Seggie and Berry, 1972). Similarly in humans, none of the callosal fibres are myelinated at birth, and in adults 30% of the fibres remain unmyelinated.…”

Section: Discussionmentioning

confidence: 97%

Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Zaehle

Herrmann

2011

International Journal of Psychophysiology

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 97%

Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Zaehle

Herrmann

2011

International Journal of Psychophysiology

View full text Add to dashboard Cite

“…Table 2 summarizes previous studies on callosal fiber composition in different species. In the rat the reported proportions of unmyelinated fibers range from 19% ] to 46.4% [Seggie and Berry, 1972], whereas in the cat these range from zero [Naito et al, 1971] to 85% [Remahl and Hildebrand, 1982]. Note that in one species (cat) even the same group of researchers has documented different proportions of unmyelinated fibers in successive reports: Koppel and Innocenti [1983] reported 43-58% of unmyelinated fibers, whereas Berbel and Innocenti [1988] reported about 74%.…”

Section: Technical Aspectsmentioning

confidence: 91%

Species Differences and Similarities in the Fine Structure of the Mammalian Corpus callosum

Olivares

Montiel²,

Aboitiz³

2001

Brain Behav Evol

142

122

View full text Add to dashboard Cite

A cross-species ultrastructural study of the corpus callosum was performed in six domestic species: the rat, the rabbit, the cat, the dog, the horse and the cow. The results indicate cross-species conservatism in callosal fiber composition with a good interspecies relation between fiber number and brain size. Across species, increases in both brain size and callosal area indicate more callosal fibers, although less than expected from the estimated increase in cortical cell number. Within each species, the correlation between fiber number and brain weight tends to disappear, although in most cases a larger callosum implies a larger number of callosal fibers. The median fiber diameter was conservative across species (0.11–0.2 µm), indicating the maintenance of conduction velocity of most callosal fibers regardless of interhemispheric distance. Nevertheless, the maximal fiber diameters tended to be higher in species with larger brains. Therefore, there is a population of coarse-diameter fibers that tend to increase their diameter and conduction velocity with increasing brain size. However, allometric calculations suggest that the associated increase in velocity in these large fibers may not be sufficient to maintain a constant interhemispheric transmission time in different species.

show abstract

“…For the rat corpus callosum, elimination of connections peaks during the first postnatal week (Ivy and Killackey, 1981) and is over before the onset of myelination (Seggie and Berry, 1972). In addition.…”

Section: Maturation Of the Zones Of Origin Of Commissural Fibersmentioning

confidence: 99%

Development of palecortical projections through the anterior commissure of hamsters adopts progressive, not regressive, strategies

Lent

Guimarães

1991

J. Neurobiol.

View full text Add to dashboard Cite

The perinatal development of anterior commissure projections was studied in hamsters by use of carbocyanine crystals implanted either into the commissure or into the ventrolateral prosencephalon. The earliest fascicles of growing commissural fibers had reached the midline on day 14 of gestation (E14). On E15, these fibers had entered the opposite hemisphere and reached the borders of their target regions. No waiting period was observed, since on E16 axons were already collateralizing into most targets. On P1, labelled cells were seen in all regions projecting through the anterior commissure in adults, namely, the anterior olfactory nucleus, olfactory tubercle, piriform cortex, nucleus of the lateral olfactory tract, bed nucleus of the stria terminalis, insular, perirhinal, entorhinal, and temporal cortices, as well as the amygdaloid complex. No evidence of topographical exuberance was detected. Counts of labelled neurons showed that the number of commissural cells increased gradually after birth. It is concluded that the development of paleocortical connections through the anterior commissure employs progressive strategies, lacking the regressive phenomena that are characteristic of the neocortical projections through the corpus callosum.

show abstract

Ontogeny of interhemispheric evoked potentials in the rat: Significance of myelination of the corpus callosum

Cited by 132 publications

References 34 publications

Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Species Differences and Similarities in the Fine Structure of the Mammalian Corpus callosum

Development of palecortical projections through the anterior commissure of hamsters adopts progressive, not regressive, strategies

Contact Info

Product

Resources

About