<s>
In	O
neurology	O
and	O
neuroscience	O
research	O
,	O
steady	B-Algorithm
state	I-Algorithm
visually	I-Algorithm
evoked	I-Algorithm
potentials	I-Algorithm
(	O
SSVEP	B-Algorithm
)	O
are	O
signals	O
that	O
are	O
natural	O
responses	O
to	O
visual	O
stimulation	O
at	O
specific	O
frequencies	O
.	O
</s>
<s>
This	O
technique	O
is	O
used	O
widely	O
with	O
electroencephalographic	B-Application
research	O
regarding	O
vision	O
and	O
attention	O
.	O
</s>
<s>
SSVEPs	B-Algorithm
are	O
useful	O
in	O
research	O
because	O
of	O
the	O
excellent	O
signal-to-noise	O
ratio	O
and	O
relative	O
immunity	O
to	O
artifacts	O
.	O
</s>
<s>
SSVEPs	B-Algorithm
also	O
provide	O
a	O
means	O
to	O
characterize	O
preferred	O
frequencies	O
of	O
neocortical	O
dynamic	O
processes	O
.	O
</s>
<s>
SSVEP	B-Algorithm
is	O
generated	O
by	O
stationary	O
localized	O
sources	O
and	O
distributed	O
sources	O
that	O
exhibit	O
characteristics	O
of	O
wave	O
phenomena	O
.	O
</s>
