Recording Of Brain Potentials Research Articles

Perceiving faces through reconnection-colored glasses after social exclusion: Evidence from N100.

Social exclusion motivates individuals to selectively reconnect with others, in which face categorization plays an important role. However, it remains unknown how reconnection possibility interacts with perception at the very early stage of face categorization. To address this issue, after social exclusion or social inclusion priming, participants were instructed to select one person from two gender-matched strangers as a future "coworker" (with high reconnection possibility; the left one is a future "stranger," with low reconnection possibility) for another ostensible task, and then complete an orientation judgment task of self-face, coworker face and stranger face, with event-related brain potential (ERP) recordings. Results showed that excluded participants produced larger N100 to future coworker face than to stranger face, but no such difference was found among included participants. Compared with included participants, excluded participants produced significantly larger N100 to future coworker face. Moreover, N100 elicited by future coworker face was significantly negatively correlated with rating scores of exclusion only for social excluded participants. These findings indicate that social reconnection desire may contribute to the biased face perception which facilitates face categorization of socially excluded people.

Neuroperception. Superior auditory spatial tuning in conductors.

Conducting a large orchestra is an impressive feat that simultaneously requires the intake of the whole musical gestalt and the analytical decomposition of the orchestral sound into its components1. How, for example, does a conductor identify a specific musician within a multiplayer section? Here we provide evidence from brain-potential recordings that experienced professional conductors develop enhanced auditory localization mechanisms in peripheral space.

Techniques for Chronic Electrode Implantation and Brain Potential Recordings

A detailed but simple technique of chronic multiple-electrode implantation as well as preparation of electrode components are explained. In addition, some hints for EEG recording techniques by multiple electrodes are given.

Toxicologic properties and stereochemical configuration in derivatives of the tropanol series

A series of tertiary and and quaternary derivatives of the stereoisomeric amino alcohols tropine and ψ-tropine has been prepared, and its members were tested intravenously for toxicity in the mouse and cat. Evidence for stereospecificity in drug interaction with the intact animals has been gathered from the gross signs of physiologic disturbance, from recordings of brain potentials in the curarized cat, and from measurement of depolarizing strength on chronically denervated muscle in the cat. With the derivatives in which the bridge nitrogen atom is substituted solely with methyl groups, it appears that ψ-isomers ( cis configuration between N and OR groups) are more potent than the corresponding tropine ( trans) isomers. In the mouse, the quaternary methiodides, ethiodides, and tertiary diphenylacetate esters are paralytic agents and/or convulsants. In the intact cat, the quaternary methiodides show neuromuscular involvement, the quaternary ethiodides function primarily as strong tranquilizing agents, and the tertiary diphenylacetates are strong convulsants. Both sets of quaternary derivatives act as weak-to-moderate depolarizing agents on chronically denervated muscle in the cat. In contrast with their behavior in the intact cat, on the curarized animal arranged for electrical recording in the cortex, the predominant effect of the tertiary diphenylacetates given intravenously is depression of activity.