The church I attend doesn't partake in communion, but I do personally raise my hands upwards with my palms facing myself in praise to God when I am on my floor in genuflection during my private prayers. There's some sense of physicality by the motions we do to praise and thank The Lord, but it doesn't seem like those motions are very uniform among ourselves; some will raise their hands, some will clasp them to their heart, some will even do the sign of the cross, too, including myself at times, but there's no set structure, of course.