Phrenic nerve conduction velocity?

[Richard Norman]

I don't have the information -- I can only assume it is a typical myelinated
axon velocity. Aalpha fibers are usually listed as conducting 70-120 m/s.

But I am curious how you plan to use this information.  The signal
takes perhaps 5 ms to travel from the brainstem to the diaphragm.
The actual muscle contraction is much slower than that.  Any irregularity
or abnormality in conduction time would be trivial compared with any
irregularity or abnormality in muscle activity.

Malcolm Phillips wrote in message <37DE0228.C73B39F9 at ukc.ac.uk>...
>Can anyone give me either some typical values for phrenic nerve
>conduction velocity or good references where I can get hold of the
>information.
>
>I'm specifically trying to obtain a value for the delay between the
>transmission of an action potential at the brainstem and its arrival at
>the diaphragm.  Values for both neonates and for adults would be good.
>
>Thanks
>Malcolm
>------------------------------------------------------------
>Malcolm Phillips, Medical Electronics Research Group
>Electronic Engineering Laboratory  Tel:+(0)1227 764000 x7621
>University of Kent at Canterbury         Fax:+(0)1227 456084
>CANTERBURY,Kent,CT2 7NT. UK