Questions:
1. A positive Hydroxyamphetamine pharmacologic test for Horner Syndrome indicates a problem in which neuron of the sympathetic chain?
a. 1st order neuron (preganglionic)
b. 2nd order neuron (preganglionic)
c. 3rd order neuron (postganglionic)

2. When the difference in dilation is + or < 0.5 mm. how reliable is the Hydroxyamphetamine pharmacologic test for Horner Syndrome?
a. sensitivity of 100% and specificity of 100%
b. sensitivity of 93% and specificity of 83%
c. sensitivity of 83% and specificity of 73%
d.  sensitivity of 73% and specificity of 63

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