References

1. https://www.ncbi.nlm.nih.gov/books/NBK542166/

2. https://www.hopkinsmedicine.org/health/conditions-and-diseases/parkinsons-disease/the-genetic-link-to-parkinsons-disease#:~:text=About%2015%20percent%20of%20people,SNCA%20gene%20(see%20below).

Loss of swallow tail sign in Parkinson disease

• Alketbi R, Loss of swallow tail sign in Parkinson disease. Case study, Radiopaedia.org (Accessed on 10 Jul 2023) https://doi.org/10.53347/rID-54700

Deep brain stimulation of subthalamic nuclei for treatment of Parkinson disease 

• Ashraf A, Deep brain stimulator. Case study, Radiopaedia.org (Accessed on 10 Jul 2023) https://doi.org/10.53347/rID-82620