Unusual origin and variation in topographical relation of inferior alveolar nerve in the left infratemporal region.

The inferior alveolar nerve and its topographical relation with the maxillary artery during routine dissection in the department of anatomy, Dayanand Medical College and Hospital, Ludhiana was studied in 50 infratemporal fossae. In one specimen an unusual variation in the origin of inferior alveolar nerve was found. The inferior alveolar nerve in this case originated from the mandibular nerve by two roots.