Sorry for the delay. I just noticed your post. It's not clear from what you say whether your husband is experiencing dystonia though this can make your toes curl into a position like a claw.
Dystonia is defined in our information sheet as "a sustained, involuntary muscle contraction". It can affect different parts of the body.
Our information sheet on Muscle cramps and dystonia gives a lot of useful information on the symptom. You can find it here: http://bit.ly/y7VEV8
You can also find some previous conversations related to your questions as follows--
Folding over toes: http://bit.ly/FPJXdO
Feet clawing: http://bit.ly/zTxDw7
Conversations about dystonia generally: http://bit.ly/zi8qxZ
Once you've had a look at these, if you are concerned that your husband may be experiencing this and would like to speak to someone, you can call our helpline at 0808 800 0303.
I hope this helps!