The Psoas Minor is a slender Muscle lying on the surface of Psoas Major Muscle. It is functionally a weak muscle that assists Psoas major in flexion of the trunk and vertebral column. The muscle normally arises from the sides of the bodies of twelfth thoracic vertebra and first lumbar vertebra with corresponding intervertebral disc. Materials and Method: The study is conducted on 30 cadavers from the Department of Anatomy J.N. Medical College Belagavi. The Psoas minor muscle was observed from its origin to its insertion. Length and width of the muscle, its fleshy belly and tendon part of the muscle was measured and the observations were tabulated. The normal anatomy and variations of the muscle were noted. Results: In the present study it was observed that the Psoas minor was present in 60% (18/30 cadavers) and absent in 40% (12/30 cadavers). It was observed that the muscle was bilaterally seen in 18 cadavers, and 12 cadavers showed unilateral presence. Conclusion: In the present study, conducted on 30 cadavers, the Psoas minor muscle was observed in 60% of cadavers. It was bilaterally seen in 7 cadavers and unilaterally seen in 5 cadavers. The normal anatomy and variations were noted. In any lower spine surgeries, the normal and variant anatomy of the muscle is important to note, and if neglected can lead to any complications during the surgery.

Keywords: Fleshy & Tendinous Part; Psoas Minor Muscle; Unilateral Muscle.