Instantaneous EEG Changes Following Chiropractic Adjustment or Sham

Inclusion Criteria: * Individuals between the ages of 18 and 50 * Individuals who can wear an EEG net for 60 minutes Individuals who can sit quietly for at least 20 minutes * Individuals who can rest on their knees on a massage chair. * Individuals who have not had a chiropractic adjustment within the last two weeks * Individuals who have not received any other interventions, such as osteopathic spinal manipulation, physical therapy rehabilitation or manipulation, massage, body movement therapies, or acupuncture within the last two weeks Exclusion Criteria: * Individuals who have been diagnosed with a serious mental disorder such as schizophrenia or major depressive disorder that could influence EEG results * Individuals who do not feel they can sit quietly with limited movement for roughly 20 minutes * Individuals who cannot rest on their knees on a massage chair. * Individuals who are on psychotropic medications (e.g. Benzodiazepine medications) that influence EEG readings (Benzodiazepine medications include but are not limited to: alprazolam, chlordiazepoxide, clobazam, clonazepam, clorazepate, diazepam, estazolam, flurazepam, lorazepam, midazolam, oxazepam, temazepam, triazolam, etc.) * Individuals with any injury or surgery to the skull in the last 6 months, or a history of trauma to the head such as a concussion or stroke * Individuals who are currently pregnant * Individuals with a current litigation related to a physical, health-related injury Individuals with untreated diagnosed osteoporosis or articular instability, such as atlanto-axial instability * Individuals who may require x-rays. Since a single session of chiropractic care is being performed, if at any point the attending chiropractor has any concerns about the ability of the participant to tolerate care or require x-rays, the chiropractor will have the authority to remove the participant from the study. * Individuals who do not present with a subluxation in the upper cervical region (C1/C2) and in the lower cervical region (C3-C7). The attending chiropractor will determine the presence of the two subluxations during the chiropractic physical exam. * Individuals with a known heart condition that results in an aberrant ECG recording