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The images below are from serial frontal (coronal) sections of a
rhesus monkey thalamus, cut at 30microns. Each group of 5
sections was stained with thionin (nissl), histochemically
for cytochrome oxidase (CO), or immunocytochemically for
28kDa calbindin (calb), 29kDa calretinin (calret) or
parvalbumin (parv). The sections stained for each marker
are in posterior (1) to anterior (12) order and are
~300 microns apart. They were scanned at 1200 d.p.i. and
are as they appear on the slides, complete with imperfections.
Numbers match across all 5 series. Nuclei are labeled on
the CO stained sections. Matched sections can be superimposed
using the sectioned profiles of blood vessels as guides.
Viewers are invited to identify "VMpo".
For a description of this material see: Jones EG, Lensky KM,
Chan VH (2001) Delineation of thalamic nuclei immunoreactive
for calcium binding proteins in and around the posterior
pole of the ventral posterior complex. Thalamus and Related
Systems 1:213-234.
For a experimental critique of the "VMpo" concept, see
Graziano A, Jones EG (2003) Widespread thalamic terminations
of fibers arising in superficial medullary dorsal horn of
monkeys and their relation to calbindin immunoreactivity.
J. Neurosci. (in press).
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