Over the past decade, robotic neurorehabilitation has become one of the most discussed innovations in neurological recovery. Robotic gait trainers, upper-limb rehabilitation systems, exoskeletons, and AI-assisted rehabilitation devices are increasingly being adopted by hospitals and rehabilitation centres worldwide. However, an important question remains: Are robots the future of neurorehabilitation—or are they simply another tool in the rehabilitation toolbox? As clinicians and researchers, we must move beyond marketing claims and focus on scientific evidence, patient selection, and clinical reasoning. What is Robotic Neurorehabilitation? Robotic neurorehabilitation involves the use of electromechanical devices that assist, guide, resist, or augment movement during therapy. These technologies include: • Robotic gait trainers • Wearable exoskeletons • Upper limb robotic rehabilitation devices • End-effector robotic systems • Sensor-based rehabilitation platforms • AI-assiste...
Blink artifacts
in EEG recordings are a common type of ocular artifact caused by the rapid
movement of the eyes during blinking.
Nature of Blink
Artifacts:
o Blink artifacts
are characterized by the rapid movement of the eyes both upward and downward
during blinking.
o The artifact
appears as a bifrontal, diphasic, synchronous slow wave with a field limited to
the frontal region.
o The slope and
duration of the artifactual wave are related to the rate of eye movement and
the duration of the eye closure.
2. Characteristics:
o The amplitude of
the blink artifact decreases quickly with greater distance from the orbits,
with the field declining steeply beyond its maximum in the region of the orbits.
o Despite its high
amplitude in the anterior region, the artifact is not present in the central
region due to the field distribution.
o The direction of
the artifact's deflection within the EEG depends on the montage used but always
indicates a changing electropositive field at the frontal poles.
3. Differentiation:
o Blink artifacts
closely resemble isolated slow waves, and their waveform can be differentiated
from other patterns by their characteristics.
o Using both
supraorbital and infraorbital electrodes is a definitive means for
differentiation of ocular artifacts, including blink artifacts.
o The presence or
absence of eye movements, along with waveform differences, can help in
distinguishing blink artifacts from other EEG patterns.
Understanding the
nature, characteristics, and differentiation of blink artifacts is essential
for EEG interpretation to avoid misinterpretation of these common ocular
artifacts as pathological brain activity.
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