Regional differences in trait-like characteristics of the waking EEG in early adolescence

BACKGROUND The human waking EEG spectrum shows high heritability and stability and, despite maturational cortical changes, high test-retest reliability in children and teens. These phenomena have also been shown to be region specific. We examined the stability of the morphology of the wake EEG spectrum in children aged 11 to 13 years recorded over weekly intervals and assessed whether the waking EEG spectrum in children may also be trait-like. Three minutes of eyes open and three minutes of eyes closed waking EEG was recorded in 22 healthy children once a week for three consecutive weeks. Eyes open and closed EEG power density spectra were calculated for two central (C3LM and C4LM) and two occipital (O1LM and O2LM) derivations. A hierarchical cluster analysis was performed to determine whether the morphology of the waking EEG spectrum between 1 and 20 Hz is trait-like. We also examined the stability of the alpha peak using an ANOVA. RESULTS The morphology of the EEG spectrum recorded from central derivations was highly stable and unique to an individual (correctly classified in 85% of participants), while the EEG recorded from occipital derivations, while stable, was much less unique across individuals (correctly classified in 42% of participants). Furthermore, our analysis revealed an increase in alpha peak height concurrent with a decline in the frequency of the alpha peak across weeks for occipital derivations. No changes in either measure were observed in the central derivations. CONCLUSIONS Our results indicate that across weekly recordings, power spectra at central derivations exhibit more "trait-like" characteristics than occipital derivations. These results may be relevant for future studies searching for links between phenotypes, such as psychiatric diagnoses, and the underlying genes (i.e., endophenotypes) by suggesting that such studies should make use of more anterior rather than posterior EEG derivations.

Tab. 1: Radiocarbon ages of the late Pleistocene and early Holocene of Mecklenburg-Vorpommern and surrounding areas

Several geoscientific projects in the last decade led to a marked increase of radiocarbon dates in Mecklenburg-Vorpommern and in neighbouring areas. The studies were mostly focussed on the genesis of the Baltic Basin and the last termination. In this Paper, a regional collection of 271 radiocarbon dates of the late Pleistocene and early Holocene (ca. 50,000-8,000 14C yr BP) is presented. The dates were calibrated, correlate, and assessed with regard to their credibility. The evaluation of the data is focussed on problems of regional palaeogeography. The age of the last Weichselian deglaciation (deglaciation after the Mecklenburg Advance) is assumed to be around 14,000 14C yr BP through radiocarbon dates from the Pomeranian Bay. This data is ca. 1,000 years older compared to former views. On the other hand, the database allows the dating of late Pleistocene basin sequences from the Baltic coast, This indicates three stratigraphic units for basin areas 0-15 m above sea level - glaciolacustrine sedimentation in the late Pleniglacial, lacustrine and telmatic sedimentation as well as soil formation in the early Lateglacial and Alleroed and aeolian sedimentation in the Younger Dryas. The Younger Dryas in the huge Mecklenburg Bay-Darss Basin NE of Rostock is characterised by lacustrine sedimentation ca. 20 m below sea level ("Baltic Ice Lake"), and by aeolian sedimentation above sea level.

The LTTE Proposals for an Interim Self-Governing Authority and Future of the Peace Process in Sri Lanka

The political brinkmanship of the Liberation Tigers of the Tamil Eelam has been illustrated vividly by the way in which it brought forward its proposals for an Interim Self-Governing Authority by exploiting the vulnerabilities of the United National Front Government. In the proposals the LTTE articulated its political intentions in concrete constitutional terms for the first time. The Proposals rationalize the armed struggle and a contractual agreement outside the Constitution. The plenary powers of the ISGA exceed the federal formula; effectively exclude the institutions of the state of Sri Lanka from the North-East; and clear the route for a separate state. This situation demands a redirection of the peace process which requires a clear political vision and a proper strategy with alternative proposals on the part of the government. In the face of present impasse of the peace process the challenges before the new Freedom Alliance government are formidable.

Considerations on the trade and finances of this Kingdom, and on the measures of Administration with respect to those great national objects since the conclusion of the peace [Texto impreso]

Autor tomado de la Britsh Library

To the Justices of the Police Court of Boston, 1828 April

Draft of a complaint against the boys in Croswell's neighborhood.

Notes about cases heard as Justice of the Peace, 1784-1795

This small paper-bound notebook contains notes Winthrop made concerning the cases he heard between 1784 and 1795 as a Justice of the Peace for Middlesex County. These notes provide insight into the nature of crimes being committed in Cambridge in the post-Revolutionary period, as well as the names and occupations of those accused and their victims. The cases involved the following individuals, among others: Samuel Bridge, Benjamin Estabrook, Joseph Jeffords, Cato Bordman, John Kidder, Spenser Goddin, Jacob Cromwell, Benjamin Stratton, Mary Flood, Bender Temple, John Willett, Joseph Hartwell, Nathaniel Stratton, Amos Washburn, Francis Moore, Thomas Malone, Thomas Cook, and Amboy Brown. The cases involved a range of offenses, and occasionally Winthrop decided that a case exceeded his jurisdiction and forwarded it to the General Court or the Supreme Judicial Court.

Record book of the settlement of the estate of Pelatiah Webster, 1795-1799

Manuscript record of the disposition of the estate of Pelatiah Webster, kept by his daughter and executrix, Ruth Webster Perit. Begins with a statement of Pelatiah Webster's death on 2 September 1795, followed by a certified copy of his will. Record also includes letter of administration; list of charges, credits, and debts against the estate; funeral costs; descriptions of properties; income from rents, etc.

A copy of the general map the most part compiled from the actual survey by order of the commisioners appointed to settle the partition line between the provinces of New York and New Jersey : manuscript map, 1769

Map showing the whole of New Jersey and its borders with as well as part of Pennsylvania and New York. Map is drawn in black ink with green, pink, and yellow watercolors used to show features such as waterways, borders, and places of interest. Notes on map concern border disputes between New Jersey and New York.

The report of the committee about Harvard Coledge: presented to the Generall Court held the 3 of (3) month, 1654

Two folio-sized leaves with a handwritten draft of the May 3, 1654 report of a General Court Committee authorized to investigate the financial state of Harvard College. The report responds directly to eight questions raised in the September 10, 1653 Order of the General Court that established the Committee. The report provides summaries of Harvard's income sources and disbursements, offers recommendations regarding the President's salary and the allowances for the academic Fellows, steward, butler, and cook, and indicates specific contributions from local towns.

Justice of the peace day book, 1797-1816

Contains records of summons and judgements in various court cases, and fines paid.

Register of the Inferior Court, 1759-1763

Contains the Inferior Court's register of debtor's cases heard for the Mayor's Court for the following counties: Orange County, Suffolk County, Westchester County, Ulster County, Duchess County, and Queens County, in New York state. The register, kept by William Wickham, cites parties to the action, sentencing, court costs, and has a name index at the end.