Secondary movements or internal movements are of three types: orientation change that involves rotation of the forearm (e.g. sun), aperture change that is realized by the movements of the fingers (e.g. cake), and wiggle which is a set of very rapid movements of fingers (e.g. computer) or forearm (e.g. gold). Wiggle is seen more rarely than other hand-internal movements.
sun
cake
computer
gold
As for the tendencies in signs that have a combination of an internal movement with a path movement, often the signs that have aperture or orientation change also have a path movement. Orientation change mostly co-occurs with straight movements (e.g. brıght), and less frequently with arc movements (e.g. socks).
brıght
socks
Aperture change generally combines with a straight movement (e.g. syrınge), and sometimes with an arc movement (e.g. catch), or a circular path movement (e.g. dream). Wiggling is occasionally combined with a straight path movement (e.g. brıght).
syrınge
catch
dream
brıght
In terms of combinations of hand-internal movements, orientation change mostly co-occurs with wiggling (e.g. brıght), and sporadically with aperture change (e.g. chaın). Aperture change is very rarely combined with wiggle (e.g. computer) and orientation change (e.g. chaın). Wiggling usually appears with orientation change (e.g. brıght), and rarely with aperture change (e.g. computer). See the example chaın below.
chaın