Event-related EEG/MEG synchronization and desynchronization: basic principles.

http://download.neurosky.com/docs/papers/bcq/Klimesch_1999_EEG_alpha_and_theta_oscillations_reflect_cognitive_and_memory_performance.pdf

EEG alpha and theta oscillations reflect cognitive and memory performance: a review and analysis

The mismatch negativity (MMN) in basic research of central auditory processing: a review.

Oscillatory gamma activity in humans and its role in object representation

In the present article, the basic research using the mismatch negativity (MMN) and analogous results obtained by using the magnetoencephalography (MEG) and other brain-imaging technologies is reviewed. This response is elicited by any discriminable change in auditory stimulation but recent studies extended the notion of the MMN even to higher-order cognitive processes such as those involving grammar and semantic meaning. Moreover, MMN data also show the presence of automatic intelligent processes such as stimulus anticipation at the level of auditory cortex. In addition, the MMN enables one to establish the brain processes underlying the initiation of attention switch to, conscious perception of, sound change in an unattended stimulus stream. 2007 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.

/pdf/invited-review-the-mismatch-negativity-mmn-in-basic-research-4qrhy54ph5.pdf

Invited review The mismatch negativity (MMN) in basic research of central auditory processing: A review

Event-related alpha synchronization/desynchronization in a memory-search task in adolescent survivors of childhood cancer.

Electrophysiological correlates of memory processing in early Finnish–Swedish bilinguals

Wayfinding at night in nature is challenging due to limited lighting and a low number of clearly identifiable landmarks. However, several activities in nature involve wayfinding at night, such as rescue services or hiking, but only a few human navigation studies have addressed these conditions. In the present study, we investigate the effects of night on the perception and recall of landmarks along a nature trail using the thinking-aloud and sketch map methods. The results reveal significant differences in the perception between day and night, which mainly originated from a restricted vista at night. In contrast, the landmark recall did not differ between day and night according to the sketch maps, which reflects uniform conceptualisation of the route in both times of day. The observed differences in the perception of landmarks may be applied to the adaptation of geospatial navigation applications that provide real-time wayfinding support, such as interactive maps and navigators, according to the day and night conditions.

/pdf/perception-and-recall-of-landmarks-for-personal-navigation-46dhzuopg5.pdf

Perception and Recall of Landmarks for Personal Navigation in Nature at Night Versus Day

In some languages, such as Turkish, Hungarian or Finnish, word formation can be said to be characteristically creative. In these languages, it is quite normal to create novel words by merging several suffixes after the stem. This process may be iterative, allowing recursive stacking of morphemes to the stem. Although it is well-known that in some languages word formation is in this way productive relative to other languages, there is little behavioral data concerning the limits of such productivity. We report an experimental investigation of the limits of word formation in Finnish and argue on the basis of our results that the word formation in Finnish is fully productive, even recursive, but it is counterbalanced by a strong complexity effect which restricts speakers' ability to understand complex words.

/pdf/on-the-limits-of-productive-word-formation-experimental-data-3rd8nbpvhy.pdf

On the Limits of Productive Word Formation : Experimental Data from Finnish

Cognitive neuroscience now leaves little or no doubt that cognitive processes require the transient integration of numerous, widely distributed, constantly interacting areas of the brain. The most plausible mechanism for such a largescale integration is the formation of dynamic links mediated by synchrony over multiple frequency bands. Neurons can exhibit a wide range of oscillations (~4-70 Hz) which can enter into precise synchrony over a limited period of time (millisecond scale). Brain oscillatory systems have been proposed to act as possible communication networks with functional relations to memory and cognition. This paper presents recent findings on macroscopic brain electric oscillations as an index of cognitive processing.

/pdf/brain-oscillations-and-cognitive-processes-mkkwkyfewv.pdf

Christina M. Krause

Papers

Event-related alpha synchronization/desynchronization in a memory-search task in adolescent survivors of childhood cancer.

Electrophysiological correlates of memory processing in early Finnish–Swedish bilinguals

Perception and Recall of Landmarks for Personal Navigation in Nature at Night Versus Day

On the Limits of Productive Word Formation : Experimental Data from Finnish

Brain Oscillations and Cognitive Processes