The Iliocapsularis - This little known muscle was described in 2000 (Ward et al. 2000). The true function of the Iliocapsularis remains unknown, but clinicians hypothesized that it may acts as an anterior stabilizer by tightening the capsule and thus reduce impingement.
Origin - The anterior joint capsule and iliopectineal eminence
Insertion - Distal to the lesser trochanter.
More to Explore
Pourcho, A. M., Sellon, J. L., Lachman, N., Krych, A. J., & Smith, J. (2015). Sonographic Appearance of the Iliocapsularis Muscle of the Hip. Pm&r.
Ward, T., Fleisch, I., & Ganz, R. (2000). Anatomy of the Iliocapsularis Muscle. Clinical Orthopaedics and Related Research.