C2 innervates the forehead and the frontal lobe. The relationship with the Broca's speech area left side of C2 may be used for speech disorders such as stuttering or post-stroke asphasia.
Due to the relationship with the frontal lobe used for a range of anxiety and depression related disorders as well as conditions such as OCD, ADD/ADHD, PTSD, and insomnia. Generally the left side is for more insomnia and ocd related symptoms and the right side is for more standard anxiety/depression realm symptoms.
May also be used for headaches, acne, sinus issues and/or visual issues, usually with other supporting points.
Opens the orifices refers to the mouth, throat and tongue, for throat swelling, hoarseness, post-stroke speech disorders, important point for muteness due to tongue stiffness or vocal cord disorders.
Epilepsy, stroke, manic depression, loss of consciousness.
Occipital headaches, especially with neck stiffness, upper cervical pain and restricted neck rotation, heaviness of head - GV 15 lies over the space between C1 and C2, and can help release the suboccipital musculature which compresses the atlanto-occipital joint.