Paresthesia-Free Fast-Acting Subperception (FAST) Study

Key Inclusion Criteria:

• Chronic pain (predominantly neuropathic) of the trunk and/or limbs for at least 6months with back pain greater or equal to leg pain.

• 22 years of age or older when written informed consent is obtained

• Able to independently read and complete all questionnaires and assessments providedin English

• Signed a valid, IRB-approved informed consent form (ICF) provided in English

Key Exclusion Criteria:

• Any pain-related diagnosis or medical/psychological condition or external factorsthat, in the clinician's best judgment, might confound reporting of study outcomes

• Significant cognitive impairment that, in the opinion of the Investigator, wouldreasonably be expected to impair the study candidate's ability to participate in thestudy

• Breast-feeding or planning to get pregnant during the course of the study or notusing adequate contraception

• Participating, or intends to participate, in another clinical trial that mayinfluence the data that will be collected for this study