adult
anatomy
arm
attention
background
body
caucasian
clean
clear
communication
display
elbow
expression
extension
fingers
five
forearm
gesture
grey
hand
index
interaction
isolated
joint
knuckles
language
nonverbal
offering
open
palm
participation
person
presenting
question
raised
reaching
showing
sign
signal
simplicity
skin
speak
stop
thumb
unidentifiable
upraised
vertical
visible
volunteering
wrist