Lumbar spine MRI report describes moderate, age-related "wear and tear" changes throughout the lower back, with the most notable findings concentrated at the lowest levels (L3-L4, L4-L5, and L5-S1). Grade 1 Anterolisthesis (L4 over L5): The L4 vertebra (backbone) has slipped slightly forward over the L5 vertebra. "Grade 1" is the mildest, lowest category of slippage. ​Disc Bulges & Annular Tears: The cushions between your vertebrae are bulging outward. At L4-L5 and L5-S1, there are small "annular tears" (tiny fraying or cracks in the tough outer layer of the disc). ​Nerve Impingement & Stenosis: Because of the disc bulges and thickened spinal ligaments/joints (ligamentum flavum hypertrophy and facetal arthropathy), the space for the nerves has narrowed (stenosis). ​L3-L4: Disc tissue is pinching/touching the exiting L3 nerve roots on both sides (right side slightly more than the left). ​L4-L5: Narrows the central canal and touches the exiting L4 nerve roots on both sides. ​L5-S1: