A patient presents for a stellate ganglion block for the treatment of CRPS Type I of the right upper extremity. After completion of the block, sympathetic blockade of the right upper extremity can be best assessed by observing:

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1. A patient presents for a stellate ganglion block for the treatment of CRPS Type I of the right upper extremity. After completion of the block, sympathetic blockade of the right upper extremity can be best assessed by observing: