| STIM -
Neuroscan Compumedics - Brasil |
A complete software environment for custom stimulus
and task design as well as presentation, the STIM system can be
integrated in FMRI, MEG, and other functional neuroimaging applications.
The software provides a familiar menu-driven interface in which to
design and present visual and auditory simulation paradigm. When coupled
with MARI-compatible visual and auditory stimulus presentation system,
STIM becomes a powerful part of your functional imaging system.
STIM’s powerful and intuitive design translated into a short learning
curve and quick implementation. Utilities make it easy to design and
execute your stimuli with the greatest precision and the wide array of
pre-packaged stimuli ensure fast integration into your search. |
| Specifications: |
- Digital Sound Editor: a program for recording, editing, and
presenting digital sound segments. SOUND has programmable attenuation
in .75 dB steps, a dynamic range from 0 to 130 dB, 16 bit CD quality
digital sampling (see Audio System, Options next page), customizable
digital filtering, spectral analysis, noise masking, mono or stereo
processing, and a variety of windowing options. Sounds can be
synthesized (i.e. pure tone, noise, click) or digitally sampled from a
microphone or line input. Precise triggering is also provided for
external devices such as SCAN EP/ERP system. Commonly used to present
click stimuli for ABR or BAER recording and to create sound files used
in other STIM modules.
- Graphics Editor: a draw and paint program that allows you to
create and edit visual stimuli for use in other STIM visual tasks
(i.e. GENTASK, NAMING, VISCPT, SPR, and TRACK). DRAW includes special
features such as visual noise masking and precise image degradation.
Additional images can be scanned and edited within DRAW.
- Generalized Task Editor: an interface for creating and presenting
almost any type of visual, auditory, or combined task and recording
behavioral responses. Here are just a few of the features GENTASK
provides that make designing complex tasks simple: calibration to
ensure precise timing of stimulus presentation and EP/ERP acquisition
system triggering; 256 color PCX image support; 16 bit sound support
(see Audio System, Options next page); present pictures and sounds in
the same task, even simultaneously; display pictures for as little as
one screen refresh; flip between pictures with virtually no delay;
plus many more too numerous to name. Has been used for a variety of
experiments including auditory N400, MMN, CNV, picture memory, and
many more.
- Motor Tasks
- Tap: a motor performance task modeled after the finger tapping
test commonly employed in neuropsychological assessment.
- Track: a visual tracking task useful in measuring visual-motor
tracking ability. Precise triggering is provided for
neurophysiological recording systems such as SCAN.
- Perceptual Tasks
- Contrast: a unique interface for performing contrast reversal
stimulation with evoked potential recording systems such as SCAN.
CONTRAST features a simultaneous fixation task to ensure foveation,
repositioning of pattern relative to fixation, vertical/horizontal
bars, selective masking, task suspension during inattentive periods,
and user definable keys for rapid assessment of visual acuity.
- Naming: a flexible interface for presenting visual stimuli and
recording verbal responses. NAME allows you to configure tasks with
almost any visual stimuli (including text and pictures), digitally
record verbal responses, and score responses for both accuracy and
latency. Precise triggering is also provided for neurophysiological
recording systems such as SCAN.
- Stroop: a version of the Stroop neuropsychological test modified
for evoked potential recordings.
- Attentional Tasks
- Cued: a visual cued attention switching task. CUED provides
central “arrow” and peripheral “highlighted box” cues and is commonly
used as an index of ability to release and reorient visual attention.
Triggering is provided for external devices such as SCAN ER/ERP
system.
- Concpt: a “go/no-go” visual continuous performance task in which
the subject’s response to the target should be contingent upon the
appearance of a cue stimulus. CONCPT also provides triggering for
evoked potential recording systems.
- Viscpt: a visual continuous performance task widely used in the
assessment of sustained attention. VISCPT provides precise triggering
for evoked potential recording systems such as SCAN and is an
appropriate interface for visual P300 and related experiments.
- Audcpt: an auditory continuous performance task. AUDCPT provides
an interface similar to VISCPT, wherein you assign probabilities to up
to 10 different auditory events. Provides precise triggering for
evoked potential recordings and is perfect for P300 and MMN
experiments.
- Memory Tasks
- Spatial Memory: a battery designed to assess static and sequential
visual spatial memory.
- Vlt: a flexible interface for presenting a variety of verbal
learning, verbal memory, and other language paradigms. VLT provides
precise triggering for ERP systems and is well suited to N400 and
other language-related ERPs.
- Spr: a visual memory task that can be used in a variety of
experiments in which serial position effects are of interest. SPR can
be used with provided “normed” pictures or your own. SPR provides
precise triggering for ERP systems and is well suited to Sternberg
memory scanning experiments.
- Cognitive Tasks
- Card Sorting: similar to the card sorting test used in
neuropsychological batteries, CARDSORT is widely used in behavioral
and imaging research studies on concept formation.
- Categories: CATEGORY is similar to the widely used
neuropsychological test, and is useful as an activation task in
imaging studies or as a behavioral measure of problem solving ability.
- The STIM Audio System and Response Interface
- Each STIM system is provided with precision hardware for recording
sounds from a microphone or line input with 16 bit A/D conversion,
playing back mono or stereo sounds at SPL calibrated levels (HL also
possible), recording manual responses with push buttons or optional
finger-lift LED photocells, recording verbal responses with
millisecond accuracy, and measuring reaction time with an independent
clock in case stimulus and response occur simultaneously. Other
features of the STIM AUDIO SYSTEM include anti-aliasing filters,
audiometric quality insert earphones, independent left and right
channel gain levels, and more.
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| Related Links: |
Stim.pdf
Brochure (4.61 MB)
Scan
Software
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+ 55 11 3662-0752 -
+ 55 11 3825-7311 -
