<s>
The	O
slit	B-Algorithm
sensilla	I-Algorithm
,	O
also	O
known	O
as	O
the	O
slit	B-Algorithm
sense	I-Algorithm
organ	I-Algorithm
,	O
is	O
a	O
small	O
mechanoreceptory	O
organ	O
or	O
group	O
of	O
organs	O
in	O
the	O
exoskeleton	O
of	O
arachnids	O
which	O
detects	O
physical	O
deformation	O
or	O
strain	O
due	O
to	O
forces	O
experienced	O
by	O
the	O
animal	O
.	O
</s>
<s>
The	O
arachnid	O
slit	B-Algorithm
sensilla	I-Algorithm
corresponds	O
to	O
the	O
campaniform	B-Algorithm
sensilla	I-Algorithm
found	O
in	O
insects	O
.	O
</s>
<s>
Slit	B-Algorithm
sensilla	I-Algorithm
tend	O
to	O
be	O
widely	O
distributed	O
over	O
the	O
arachnid	O
's	O
exoskeleton	O
,	O
but	O
have	O
also	O
been	O
found	O
to	O
be	O
grouped	O
at	O
specific	O
locations	O
and	O
in	O
a	O
bundle	O
of	O
parallel	O
lines	O
;	O
the	O
latter	O
distribution	O
is	O
referred	O
to	O
as	O
a	O
"	O
lyriform	B-Algorithm
organ	I-Algorithm
"	O
.	O
</s>
<s>
The	O
term	O
"	O
lyriform	B-Algorithm
organ	I-Algorithm
"	O
comes	O
from	O
the	O
shape	O
of	O
such	O
grouped	O
slit	B-Algorithm
sensilla	I-Algorithm
,	O
which	O
resembles	O
a	O
lyre	O
.	O
</s>
<s>
Arachnids	O
with	O
lyriform	O
slit	B-Algorithm
sensilla	I-Algorithm
are	O
commonly	O
used	O
as	O
experimental	O
subjects	O
for	O
investigations	O
into	O
mechanosensation	O
because	O
the	O
almost	O
2D	O
structure	O
of	O
their	O
slit	B-Algorithm
sensilla	I-Algorithm
allows	O
for	O
relatively	O
simple	O
understanding	O
of	O
the	O
system	O
;	O
thus	O
,	O
the	O
results	O
of	O
electrostimulation	O
on	O
such	O
arachnids	O
can	O
be	O
easily	O
recorded	O
.	O
</s>
<s>
Etymologically	O
,	O
"	O
slit	B-Algorithm
sensilla	I-Algorithm
"	O
are	O
so	O
named	O
because	O
they	O
resemble	O
a	O
channel	O
penetrating	O
through	O
the	O
exoskeleton	O
into	O
the	O
animal	O
;	O
despite	O
this	O
appearance	O
,	O
however	O
,	O
investigation	O
has	O
shown	O
that	O
slit	B-Algorithm
sensilla	I-Algorithm
do	O
not	O
actually	O
penetrate	O
the	O
chitin	O
of	O
the	O
exoskeleton	O
,	O
but	O
merely	O
represent	O
a	O
thinning	O
of	O
the	O
material	O
.	O
</s>
