What muscles are used while doing dumbell curls?

The muscles used in a shoulder press are the deltoids and triceps. In a more complex manner, these are the following muscles and what time of mover they are (primary, stabilizer or secondary):

Primary Movers:Anterior Deltoid

Secondary Movers

Lateral DeltoidSupraspinatusTriceps Brachii (the triceps is actually only a two headed muscle)Middle TrapeziusPectoralis Major

Stabilizers:

Long head of the tricepsShort head of biceps brachii (funnily enough the biceps is a three headed muscle)Upper trapezius