Third and fourth finger stick together?

[mcmxviii]

I am just about a beginner and my teacher noticed this but couldn't offer any explanation. Google had no help either except a reference to a book about Glenn Gould and dystonia but didn't offer any details at all except that it was odd.

As soon as I relax my hand after spreading all my fingers out the third and fourth fingers almost immediately shut together with basically no space in between. The other fingers barely move and they stay roughly in the same position but fighting against the third and fourth moving back together makes both fingers start trembling. The natural position for my hands to be in has big wide spaces between the other fingers but very little between 3 & 4

Does anyone else experience this or maybe has any idea what's going on? Is it just tight ligaments which I could maybe work on, or something else?

[ranniks]

This would be epic if you were a violinist I think.

[indianajo]

Getting control of my third fourth and fifth fingers were what the first two years of piano were about for me.  I was not using the third of one hand independently at all, and my Mother assigned me piano excercises to try to correct that, in the days before doctors worried about that sort of thing.  I used the Schmitt exercises out of the G. Schirmer book, many repetitions each.  These were so mechanical I was allowed to read novels while I did them, but they had the desired response.  I can for example type at about 200 WPM, and my piano speed is limited by strength, not nerve control limitations.  I have enough control over the injured finger that I can thread a nut on a bolt blind with the third and fourth fingers upside down and behind an obstruction.  
Industrial ergonomics books have some finger tendon and muscle stretching exercises that my piano teacher never taught me.  One involves bending the fingers of one hand back towards a right angle until stretch is felt (not pain) by pushing the fingers with the palm of the other hand. Look at a book to see the pictures before following this advice. 
Good luck and I hope you make progress in your goal of great control of your fingers.

[faulty_damper]

This is simple anatomy: those fingers share a single tendon.

With training (developing the muscles in the hand), you can learn to move them more independently.  It's not a big deal at this point in your piano studies.