Critique These Hand Sketches Please

[Burton]

Hi, I'm way out of life drawing practice. Please tell me where these suck. I'm blind to them:

http://www.itg.uiuc.edu/people/burton1/handsketch2.jpg

http://www.itg.uiuc.edu/people/burton1/handsketch.jpg

[loomer]

first- i like these very much. nice energy and good job capturing the motion.

quick crits - first one - Thumb looks off to me...maybe not correct position or the shape is a little wierd. otherwise i really dig

2nd - the ring finger and pinky finger look a little too soft- I guess i would expect to seem more hint of a bone at the joints where they bend. does that make sense?
again - i like these both very much

[fredflickstone]

these are finger studies, not hand studies. How do the palms work and insert into the forearm? How are the tendons of the flexors influenced by the gesture of the hand? What is the correct foreshortening, or perspective of the phalanges?

SOrry if that is hard, but these are not developed yet to make any real concrete comments. The proportions kinda feel right, but thats about it so far. Theres nothing else there...