Something is wrong with my Chameleon please HELP

[lewis2000]

Something is wrong with my male Yemen/Veild chameleon can anyone HELP im not sure he might have fallen and given himself brain damage he is struggling to control his legs sometimes he is grabbing onto his own body instead of the twigs he is eating/drinking and his colour is good I dust his food with calcium (is there any other way of giving chameleons calcium) but think this could be the cause He looks like skin and bone but the Female seems to be fine They share a Large Flexarium cage and I was told by the person I bought them off that they would live fine together and they do seem to be. I have a 100w heat bulb witch is on 24 7 and a UVB bulb which is on from 8 in the morning till 10 at night. I feed them a mixture of locusts, crickets and mealworms...can anyone please help diagnose what is wrong with him cause my local vets wont have much knowledge due to my location. Can someone please help i love him to pieces and I don’t want him to die.