On 6 Jul 1995, Didier A. Depireux wrote:
> Date: 6 JUL 1995 20:38:41 GMT
> From: Didier A. Depireux <didier at eng.umd.edu>
> Newgroups: bionet.neuroscience
> Subject: Incision and reflection of dura
>>> During surgery on a mammal, we perform a small (5mm by 5mm) craniotomy,
> and we want to expose the underlying cortex for single electrode recordings.
> For this, we have to incise and reflect the dura, but I am not satisfied
> with our method. Basically, we take very fine forceps and iridectomy
> scissors, rub the forceps on the dura until, at some point, something
> in the dura actually gets caught by the forceps, lift the dura, cut it
> and further resect it with the scissors.
> When you do that, it really feels like you are rubbing against the dura
> until something breaks on it, and you use the slit you just made to lift
> the dura, pia and arach. membrane and cut through the meninges. It seems
> to me that there should be a better way.
> What do people on this group do when they are faced with having to expose
> cortex? How do neurosurgeons do it with humans, without (obviously)
> damaging the underlying cortex?
>>> Didier
>>didier at src.umd.edu
A small sharp hook made from a needle will be useful to hook up the dura
between its two layers before you cut it through, which I have tried on
rats, rabbits and monkeys. My clinical experience tells that it is
much easier in human because the dura is much thicker than that in animals.
Good luck!
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Xuguang Liu ~{AuPq9b~}, Voice: 44-(0)1865-272116; Fax: 44-(0)1865-272469
Email: xl at physiol.ox.ac.ukhttp://www.physiol.ox.ac.uk/~xl/
University Laboratory of Physiology, Parks Road, Oxford OX1 3PT, UK
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