Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) inclusion body myopathy 2 ?
    ### Response:
    Inclusion body myopathy 2 is a condition that primarily affects skeletal muscles, which are muscles that the body uses for movement. This disorder causes muscle weakness that appears in late adolescence or early adulthood and worsens over time.  The first sign of inclusion body myopathy 2 is weakness of a muscle in the lower leg called the tibialis anterior.
    