The Objective of the Protocol is to Generate Real World Evidence (RWE) Supporting the Safety, Performance, and Health Economics of Using the Regulatory Approved and Commercially Available EARP Interbody System Used During Lumbar Interbody Fusion (LIF) Procedures With the EARP Nerve Cuff Electrode

Inclusion Criteria: * Undergoing LIF between L2-S1 Exclusion Criteria: * BMI \>40 kg/m2 * Pregnant or plans on becoming pregnant in the near future * Surgery requires combination of EARP with another lumbar interbody fusion technique (PLIF, TLIF, ALIF, OLIF, LLIF) or posterolateral fusion at another level * History of lumbar interbody pseudoarthrosis at planned operative level * Lumbar spondylolisthesis ≥ grade 3 * Osteoporotic vertebral compression fracture treated or untreated at planned operative site * History of lumbar spinal metastasis * Acute lumbar spine trauma requiring immediate intervention * Owestry Disability Index (ODI) 81-100% * Presence of personality disorder or major psychiatric illness * History of allergy to titanium, platinum, PEEK, aluminum, stainless steel or silicone * Any additional factor that makes the patient an unsuitable candidate for the study in the opinion of the principal investigator