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unit recording

Dr Thomas Salt smgxt01 at ucl.ac.uk
Fri Feb 4 04:36:04 EST 1994

wsun at jeeves.ucsd.edu (Fiberman) writes:

>Hello all,

>For the electrophysiologists out there:  What is meant by single
>unit and multiple unit recordings?  This is in reference to
>recording activity from cells in the brain.


Quite simple.  Single Unit recording is from a single nerve cell
(neurone) or fibre (usually with an extracellular electrode).
multi-unit is when a single electrode picks up action potentials from
several cells or fibres, and these are then seen as a collection of
spikes on the recording: this is sometimes useful for looking at the
population repsonse of a group of closely grouped cells (eg in a
cortical area).

Tom Salt.

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