Chiasm (anatomy)In anatomy a chiasm is the spot where two structures cross, forming an X-shape (). Examples of chiasms are: A tendinous chiasm, the spot where two tendons cross. For example, the tendon of the flexor digitorum superficialis muscle, and the tendon of the flexor digitorum longus muscle which even forms two chiasms. In neuroanatomy, the crossing of fibres of a nerve or the crossing of two nerves. Different types of crossings of nerves are referred to as chiasm: Type I: Two nerves can cross one over the other (sagittal plane) without fusing, e.
P200In neuroscience, the visual P200 or P2 is a waveform component or feature of the event-related potential (ERP) measured at the human scalp. Like other potential changes measurable from the scalp, this effect is believed to reflect the post-synaptic activity of a specific neural process. The P2 component, also known as the P200, is so named because it is a positive going electrical potential that peaks at about 200 milliseconds (varying between about 150 and 275 ms) after the onset of some external stimulus.
Effet Stroopvignette|D'après les expériences de Stroop, lorsque le nom d'une couleur est écrit dans une couleur différente (mot incongruent), il est plus difficile de nommer la couleur dans laquelle il est écrit, que de le lire. vignette|Figure 1 de l'expérience 2, extraite de l'article original de Stroop en 1935, montrant le temps nécessaire pour nommer la couleur de points (sans interférence, 1) et de mots incongruents (avec interférence, 2). Ce temps augmente en moyenne de 74 % lorsqu'il y a interférence.
