Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Schwartz Jampel syndrome type 1 ?
    ### Response:
    What are the signs and symptoms of Schwartz Jampel syndrome type 1? Individuals with Schwartz-Jampel syndrome type 1 (SJS1) have characteristic facial features, muscle weakness (hypotonia), and muscle stiffness (myotonia). Facial features of individuals with SJS1 can seem "fixed" in the same expression with puckered lips due to weakening and stiffening of the facial muscles.
    