A contribution to the anomalies of heterochtonic back muscles.

@article{Holibkov1998ACT,
  title={A contribution to the anomalies of heterochtonic back muscles.},
  author={Alzbeta Holibkov{\'a} and L Mach{\'a}lek},
  journal={Acta Universitatis Palackianae Olomucensis Facultatis Medicae},
  year={1998},
  volume={141},
  pages={53-5}
}
Some authors described a muscular adult man with a quite large bilateral muscle originating from the front margin of the transverse process of the C1-C2 vertebrae and inserting to the back margin of the clavicle next to the conoid tubercle. They named it levator claviculae.