Neuroanatomy slides

Honor to Won Teak. Admire the marvelous neuroanatomy slides.

Canned Brains

This is SPAM Jim, but not as we know it. From the image community but also reads Loreta data format. Could be interesting ...

Maxi MEG

If You - by change or merits- happen to be disgustingly rich the time is now right to spend some of that hard cash on a really usefull acme.

Of course the people at ANT will be happy to help You out and "navigate" You to a complete solution. MEG is indeed fantastic and should be every neurophysiologist's dream. It does not replace EEG though but is nicely complementary. But it sure needs very good analysis software to visualise what is going on in the brain. With ASA, the guy's at ANT provide the best tools on the market.

ANT user meeting

Cognitrace Workshop, May 11, 2007, St. Truiden Information, programme and registration form will be added soon.

VenueMozart-Brain-LabStationsstraat 363800 St. TruidenBelgium

A Brainy car: ANT did it again.

Driving a car while having Your EEG (64 channels !!!) taken ? Science fiction ? Not with ANT.

With ANT: TSITL

(the sky is the limit: wich means that probably You will soon have an EEG while on a 747 transatlantic flight...). Check out what they have developed.

Brain on Fire !! (video)

If an image is worth a thousand words, a movie drives home the message of a thousand images. For this three-dimensional visualization of amyloid deposition in the brain of a person with mild Alzheimer disease, PET images obtained after injecting the amyloid tracer PIB were superimposed on the magnetic resonance image of the same patient. The patient’s MMSE was 25. The movie shows extensive amyloid deposition in cortical and deep brain areas.This patient’s amyloid probably won’t spread much further as disease progresses. In fact, PIB imaging studies comparing AD patients, people with mild cognitive impairment, presymptomatic carriers of familial AD mutations, and healthy controls are indicating that a person’s amyloid load has more or less fully formed even before they develop symptoms of AD. The relationship of amyloid deposition and AD symptoms over time is the subject of current studies.

Video credit: Scott Ziolko and the Pittsburgh Amyloid Imaging Group.

Quick Brain

A series of two-page newsletters explaining how basic neuroscience discoveries lead to clinical applications.

An interesting series of two pagers on many neuroscience topics. from the Society For Neurosciences. See also the Brain facts book (free downloadable: a must have)

ANT: Neuronavigation

Magnitrace 3D Navigation system for TMS Coil positioning Magnitrace allows to: - Co-register TMS, MRI and EEG using sophisticated 3D digitization technology. Image guided TMS can be applied with simultaneous recording of high-density EEG allowing maximum flexibility in the application of the different modalities. - Review results of earlier navigation/stimulation/source reconstruction for navigation purposes, e.g. repetition of stimulus at the same conditions - Analyze the positioning of the coils in exact time synchronization with the EEG/EMG/EP data to separate good from bad trials, create conditional averages of EPs etc. - Digitize electrode positions by means of the digitizer pen 3D electrode digitizerMagnitrace takes care of the electrode digitization procedure and records, visualizes and stores the digitized electrode positions. The sequence of the digitization procedure is pre-defined by the user. Positions are acquired by locating the respective electrode at the scalp, placing the digitizer pen at that location and pressing a button. Markers (nasion, left and right pre-auricular points) are digitized as well. This way, the electrode positions are transformed to the nasion-ear coordinate frame. During the procedure a head tracker monitors the movement of the subject and compensates the acquired positions for these movements. The system provides real-time feedback on the current location of the digitizer pen and acquired electrode position by displaying them in the MRI and head surface. Digitized electrode position are immediately marked on the head surface and visualized in the MRI for inspection. The 3d electrode digitizer module in Magnitrace is also sold as standalone electrode digitizer (without the functionality for TMS coil navigation). More information is provided in the asa-lab digitizer section. How does it work? The Magnitrace system is based on the Polaris Spectra system. This tracking hardware uses infrared light to track tools (like a digitizer pen or TMS coil). Each tool is equipped with multiple markers. The markers reflect infrared light back to the position sensor and from this the 6D position is retrieved (position and orientation). These positions are visualized realtime in the Magnitrace together with the MRI and possibly the head model of the subject/patient.

Fourier transformation

3 very good tutorials in pdf. Not to be missed. Lots of other tutorials also.

Non linear Time Series analysis and Neurosciences

Andreas Galka 22.9.2004 prepared a large list of links Nonlinear Time Series Analysis The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I've found it!), but 'That's funny...'" -- Isaac Asimov

First Microsoft Robot

I, the Robot.

Intel inside ?

Made in a seattle studio by Mr Bill Gates.

Mind stuff at BBC

Do the game but also check out this nice site at BBC. More memory stuff on radio 3 or was it radio 5 ??? Try here

Radiant Cool ?

keep a cool brain !

SPM 5

Available here (also very interesting publications and courses).

In the eye of the beholder

A phenomenal encyclopedic site about... the eye. Check it out !

Biofeedback and Brain Computer Interface

Check out Bianchi's site. A lot of interesting material to get a quick start.

A nature-al Blog

Even Nature has started a blog on Neurosciences. It is called "action Potential". Well worth a good look. Tons of interesting stuff to be found here. From the editors of Nature Neuroscience: de crème de la crème.

Non linear EEG segmentation

Chop chop Your EEG in tiny sgments, peculiar epoch's and other strange non-linear pieces. Complex stuff for those interested in complex things like ...brains and EEG signals ? Not for the faintharted. But it could change Your point of view on segmentation: Application of the change-point analysis to the investigation of the brain's electrical activity

A.Ya.Kaplan, S.L.Shishkin

This chapter is devoted to one of the most interesting applications of non-parametric statistical diagnosis, namely, to the analysis of the human brain's electrical activity (the electroencephalogram, or EEG). The meaning and the features of the EEG, as well as the problems arising from the high non-stationarity of the EEG signal, are reviewed. We present experimental results demonstrating the application of the statistical diagnosis methods described in this book to the EEG, and discuss the prospects for further development of the change-point detection methodology with the emphasis on the estimation of coupling between different signal channels.

TISEAN

Interested in non linear time series analysis. Try this gem ! For free but already a classic in the field.

Neurofeedback

A lot of pdf files and articles. Info about neurofeedback. Read here

Weg met stress

Tegen en luttel bedrag helpen zij U van uw stress vanaf.

Golf beter met EEG golven

gezien op een commerciele stand van een neurofeedback bedrijf. Si non e vero e bene trovato... Get to grip and loose your Yips with this gadget.

BRC: new kid on the Blog

BRC QEEG procedure

Cliënten worden niet-invasief onderzocht waarbij het functioneren van de hersenen wordt gemeten door het oppikken van stroompjes die over de schedel lopen - het zogenaamde Quantative ElectroEncephaloGram of QEEG - en door middel van neuropsychologische tests. De volgende maten worden synchroon opgenomen tijdens het QEEG onderzoek: EEG, huidgeleiding (SCL, SCR of GSR), hersenpotentialen (QEEG, ERP - Event Related Potentials) , afgeleiden van het autonome zenuwstelsel (ANS: hartslag, ademhaling) en motorische reacties zoals reactie tijden.

Terwijl de cliënt aangesloten is worden er meerdere activatie tests afgenomen die elk een afgeleide zijn van een ander functioneel netwerk in de hersenen. Deze metingen geven informatie - met een milliseconde tijdsresolutie - over de verwerking van deze informatie in de hersenen. De volgende specifieke tests worden gebruikt in het QEEG onderzoek:

De tests:	Wat de test meet:
Resting QEEG eyes open and closed	A baseline and overall stability
Auditory habituation	Automatic learning
Auditory oddball task (ERP)	Efficiency in processing relevant information
Visual tracking	Automatic tracking
A Go/No-go task	Extent of impulsivity
Visual working memory	Working memory
Conscious and sub-conscious faces	Processing of facial emotions
Electronic maze	Capacity to plan
The startle response	Body's 'fight or flight' reflex

Zowel het hersenonderzoek (QEEG) als het neuropsychologisch onderzoek duren beide minder dan een uur en de taakinstructies zijn erg eenvoudig en goed te begrijpen. Inclusief wat aanvullende vragenlijsten en het 'aansluiten' van de apparatuur is een cliënt 3 uur bezig met het volledige onderzoek. Alle tests worden gebruikt voor alle leeftijden en daarmee is de database 'aanname vrij', waarmee de natuurlijke ontwikkeling van een bepaalde test over verschillende leeftijd perfect gevolgd kan worden. Betrouwbaarheid en validiteit van deze tests is goed bevonden en ook gepubliceerd.

Voor een uitgebreide beschrijving van de psychofysiologische ne neurofysiologische tests klik HIER

Filters

Filtering is een methode om bepaalde informatie uit een signaal te halen zoals het EEG. Als men het heeft over alpha of SMR dan heeft men het vaak over een specifieke gefilterde output zoals 8-12 Hz (alpha) of 12-15 Hz (SMR).

Er zijn verschillende soorten filters, zoals FIR and IIR filters. Voor een technische verhandeling over real-time filtering zie ook een overview van Brainquiry. Meer informatie over filtering kan ook op de volgende link gevonden worden: Maxim

Filtering verandert ook de morfologie van je signaal wat dus belangrijk is bij de interpretatie van gefilterde data. Hiernaast is een screenshot te zien van een ongefilterd ECG signaal (rood) en hetzelfde segment gefilterd door een FIR filter (geel), een Butterworth filter (licht blauw), een Chebyshev IIR filter (donker blauw) en een Elliptic IIR filter (paars). Zie de grote verschillen in het P-Q-R-S complex van het ECG ten gevolge van filtering. Alle ECG versterkers filteren in de hardware, dus de vraag zou zich op kunnen dringen of een cardioloog ooit wel eens een 'echt' ECG gezien heeft zoals het ongefilterde rode signaal, of enkel gefilterde ECG signalen!

BrainArt

It's art , Jim but definitely not as we know it..... (de gustibus et coloribus...). Let your brain see for itself...(here)

Congres Society Applied neurophysiology

Nijmegen 17-20 mei 2007.

Zie hier voor het programma

Vooral de sectie on BCI, Loreta, ICA lijkt erg interessant. De sprekers zijn van klasse !

A visit to consciousness

Cognition and consciousness. This study shows clearly that consciousness is not necessary to activate cognitive circuitry. Subliminal stimuli show activation of hippocampal (novelty) and prefrontal structures.

The figure shows increased activation in the prefrontal and hippocampal regions during explicit retrieval elicited by subliminally presented primed (Recognized) and unprimed (Unrecognized) stimuli. A majority of stimuli in the primed condition were recognized by the volunteers, while in the unprimed condition, most of the stimuli were unrecognized. The prefrontal activity was unilateral (left middle frontal gyrus) in the unprimed (Unrecognized) condition, and bilateral (left middle frontal and right superior frontal gyri) in the primed (Recognized) condition. Primed stimuli activated the right hippocampus while unprimed stimuli activated the left hippocampus. Histograms show percent change in MR signal intensity in different contrast conditions in the areas of interest: R = Recognized (primed) picture; U = Unrecognized (unprimed) picture; B = Baseline condition; BA = Brodmann's area. Cortical activation elicited by unrecognized stimuliRajendra D Badgaiyan Department of Radiology Harvard Medical School; and Massachusetts General Hospital, Boston, MA 02114, USABehavioral and Brain Functions 2006, 2:17 doi:10.1186/1744-9081-2-17 The electronic version of this article is the complete one and can be found online at: http://www.behavioralandbrainfunctions.com/content/2/1/17

Pearls of Neuroscience

Dan J. Stein, MD, PhD University of Cape Town “Pearls in Clinical Neuroscience” focuses on the nexus of neurology and psychiatry. It is a review of one or more case studies where mental health issues crossover between neurology and psychiatry. Included with the report is a review of the available data and the history of the given topic.

Follow the links

Free FREEMAN Tutorial

From single Neurons to Total Brain Chaos. Following Walter Freeman as a guide You do not have to fear about getting lost in the meanders of Neuroscience. Read it here.

EEG patterns

Besides EEG artefacts also an atlas of specific patterns in epilepsy and pathology is very useful. Try Medscape's.. Its free for You to try it here

EEG artefacts

Some say that an experienced EEG'ist is a person who mastered the art of distinguishing artefact from truely valid signals. There is certainly a lot of truth in this statement. So any tool that could help us to become more 'experienced' and proficient in the 'art' is welcome. That is wat emedicine offers with this handy electroencepfalografic atlas. Dive into the world of artefacts and get a black belt at the art of EEG pattern recognising.

Brain Computer Interface in Nature

Brain-machine interfaces promise to aid paralyzed patients by re-routing movement-related signals around damaged parts of the nervous system. A new study in Nature demonstrates a human with spinal injury manipulating a screen cursor and robotic devices by thought alone. Implanted electrodes in his motor cortex recorded neural activity, and translated it into movement commands. A second study, in monkeys, shows that brain-machine interfaces can operate at high speed, greatly increasing their clinical potential. This Nature Web Focus includes exclusive interviews and video footage of experiments, alongside papers that paved the way for these recent advances."

SAN ity

SAN: Society of Applied Neuroscience is een site en organisatie die zeker de moeite waard is om verder uit te diepen. Veel interessant materiaal oa de Howard Hughes Medical lectures (oa over Spinocerebellaire ataxie en Rett syndroom).

Een aanrader (ook om lid te worden)

Cursus Psychofysiologie

De eerste cursus is reeds vol maar wie interesse heeft kan hier reeds inschrijven voor een heruitgave vermoedelijk in het najaar van 2007.

Het betreft een reeks van 5 lessen waain aan bod komen:

1. basis EEG
2. EP en ERP
3. P300 en CNV
4. SlaapEEG
5. QEEG

Naast rijke illustratie met powerpointslides is er ook een syllabus voorzien.

Contact: psychofysiologie.be (vereist inschrijving)

Beaune Neuromeeting

The Neuromeeting is starting next week. Last moment booking here. Beaune, France, January 25 - 27, 2007 We have the pleasure to invite you to our annual neurodiagnostics and neuroscience meeting, which will be held in Beaune, Bourgogne, France in January 2007.We have done our best to prepare the scientific program, containing topics on EEG/ERP diagnostics in psychiatry patients, intra-operative EEG/EP monitoring and epilepsy. Besides, there will be plenty of time to taste the great wines of the region and to have personal communications.We hope that the coming meeting will be an even bigger success than the previous ones and are looking forward to welcoming you in Burgundy

Article Manager

The last entry " de zevende dwerg" may have seem to be a bit out of line in a serious neuropsychophysiology blog but then again it is all about lateral thinking so after all it can stay and keep on teasing innocent bypassers. Something however much more serious and usefull is the work of Albaspace (a Flash wizzard) who offers a free (GPL License) Article Manager targeted especially for neuropsychofysiology. Test it out and send remarks and suggestions to the autor. If You like it do not forget to send him a little word of thanks. Download it here. have fun. Georges

Ontspanning

Op dit plaatje ziet u zes dwergen. De 'smurf' in het kadertje telt niet mee. Zoek de zevende dwerg !

Visualisatie

Sommige vormen van wetenschappelijke visualisatie zijn zeer spitsvondig en koppelen vaak het nuttige met het aangename. Zeer spitsvondig is deze japanese site die Uw zoekresultaten op amazone.com op zeer originele wijze weergeeft. men typt best korte zoekopdrachten zoals EEG, ERP etc... Echt een aanrader.