Nervus Saphenus is a nerve that runs down the leg and provides sensation to the inner portion of the thigh and leg. This nerve is also known by other names, including the saphenous nerve, the long saphenous nerve, and the anterior cutaneous nerve of the thigh. These synonyms are often used interchangeably in medical contexts to refer to the same nerve. Some other related terms include the medial femoral cutaneous nerve, which provides sensation to the front of the thigh, and the lateral femoral cutaneous nerve, which provides sensation to the outer side of the thigh. Together, these nerves play an important role in ensuring proper sensory function and movement in the leg.