Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Spastic paraplegia 11 ?
    ### Response:
    Spastic paraplegia 11 is a form of hereditary spastic paraplegia. People with spastic paraplegia 11 experience progressive muscle stiffness and eventual paralysis of the lower limbs, as well as a range of other neurologic symptoms. The tissue connecting the left and right halves of the brain (corpus callosum) is abnormally thin in individuals with this condition.
    