Effect of the acute treatments with galantamine and/or soman on the
percentage of CA1 SRIs exhibiting type II currents in response to ACh. A, bar
graph depicts the percentage of CA1 SRIs that respond to ACh (0.1 mM) with
type IA or type II currents in various groups of animals. Ordinate, number of
neurons showing type IA or type II currents. Note that all type II current
neurons also had type IA currents. The percentage of neurons responding to ACh
with type II currents in each group is shown at the top. Results obtained from
P11 to P26 animals were grouped together. In each treatment group, results
obtained from slices taken from the guinea pigs at 1, 7, and 14 days after
that treatment were pooled together. The prevalence of type II currents in CA1
SRIs of galantamine-treated animals is significantly lower compared with
control by Fisher's exact test (*, p = 0.017). B, results for each
treatment group are categorized according to the age of the animals and the
time after a given treatment. C, bar graph depicts the peak amplitude and net
charge of type II currents recorded from SRIs of control and soman-challenged
animals. Results from all age groups were pooled together. Graph and error
bars are mean and S.E.M., respectively, of results obtained from various
neurons. Numbers in parentheses represent the number of neurons studied in
each experimental group.