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and go apically here up
into the apical turn.
You can see a very
little bit of it
in the extreme basal
part of the cochlea,
and that's diagrammed
here on this graph.
This is the length along
the basilar membrane
from the base over here
on the right to the apex.
And this y-axis graphs the
percent of the hair cells
that are remaining.
And in the basal
turn, they're almost
zero hair cells remaining.
They're all gone.
Maybe a couple little
islands here and there,
but it's virtually
100% hair cell loss.
And as you go around
the upper basal turn,
you have most of the
hair cells remaining
in the case of the solid line,
which refers to the inner hair
cells.
And then you have, in the
dashed lines, the three
rows of outer hair
cells, and there, maybe
between 30% and 70%
remaining depending
exactly where you are.
But here again, something
has damaged these hair cells,
completely wiped them out in
the basal half of the cochlea.
And wiped a lot of
the outer hair cells
out and not very many of the
inner hair cells are wiped out.
Here's the subject's
right cochlea.
And in this case, you
can see-- you don't even
need the graph-- you can
see that the organ of Corti
is pretty intact.
Here is a little island
of loss, and then
another little island
of loss, but then you
have an intact organ of Corti
all the way up to the apex,
and that's reflected in the
counts here where you have,
except at the very basal
part of the cochlea which
doesn't appear in
the micrograph,
you have a pretty normal