Because anxiety can decrease learning ability dramatically, the anxiety itself becomes the bigger problem. The difficulties caused by the anxiety far out shadow the difficulties caused by a specific learning disability.
This anxiety can spiral out of control. Causing more and more learning challenges. Causing more and more bad behavior and making everything far more difficult. Soon the effects of anxiety are a far bigger issue than anything else. Performance will suffer and even worse, learned helplessness can creep in.
But there is an answer. There are many techniques for quieting anxiety. Mind-body and proprioceptive exercises are very effective. There are systematic approaches to making sure anxiety never happens at all. Approaches that use kaizen practices to create many small learning wins. This creates a positive feedback loop of learning progress. Additionally, Building confidence will eliminate anxiety because at it's root anxiety is a physical expression of fear.