To date the effects of chiropractic care on behavior and neurological function in children diagnosed with ADHD has not been investigated thoroughly and is limited mostly to case studies and retrospective case reviews. Our research group recently completed a pilot study that investigated the effects of a single session of chiropractic care on oculomotor function and reading ability in children with ADHD. The findings of this study suggested that chiropractic care may have a role in improving oculomotor control and reading ability in this population group. This proposed study is the next step in this program of research and is a pilot clinical trial that will investigate whether 4 weeks of chiropractic care influences behavior, neurological function, or quality of life in children with ADHD.

ADHD is a disorder that may affect an individual's academic performance, social interactions, and interpersonal relationships amongst others. It is characterized by impulsiveness, hyperactivity, and inattention. It was previously thought that children overcome ADHD as they grow up, however, recent studies suggest that 30-60% of affected individuals continue to show significant symptoms of the disorder as adults and have associated difficulties such as lower educational and employment achievement. Conventional therapeutic approaches that are used with individuals with ADHD generally involve pharmaceutical interventions and behavioral therapies such as counseling and behavioral modification. However, little is known about the long term effectiveness of these treatment approaches which are also known to involve significant risks and complications.

ADHD is a neurodevelopmental disorder that is associated with significant alterations in brain development and function. These include changes in fronto-striatal pathways that can lead to difficulties with "top-down" control. It is also likely that connections in the parietal lobe and cerebellum are involved. These neurological changes are associated with a number of alterations to sensory filtering, sensorimotor gating, and sensorimotor control. This lends itself to a potential role for chiropractors in caring for children with ADHD because chiropractic care has been shown to alter a number of aspects of sensorimotor function.

Chiropractic is based on the theory that spinal adjustments applied to areas of spinal dysfunction, known as vertebral subluxations, can improve the function of the nervous system. Our research group has been testing this theory for the last 15 years. We have hypothesized that the articular dysfunction component of the vertebral subluxation results in altered afferent input to the central nervous system (CNS) that modifies the way in which the CNS processes and integrates all subsequent sensory input. This processing (i.e. sensorimotor integration), is a CNS function that appears most vulnerable to altered inputs. Recent studies have shown that chiropractic care alters sensorimotor filtering, cortical and cerebellar motor processing, and multisensory processing, all of which may be important in the neurodevelopment of ADHD. Given the nature of the neurological changes associated with ADHD and the growing body of evidence that suggests that chiropractic care may influence neurological function, it is possible that chiropractors may play a role in enhancing the neurological function of individuals with ADHD.

Inclusion Criteria:

• have been previously diagnosed with Attention Deficit Hypersensitivity Disorder based on the criteria outlined in the DSM-V.

Exclusion Criteria:

• have absolute contraindications to chiropractic adjustments
• have experienced previous significant adverse reactions to chiropractic care or manual therapies.
• investigators are unable to get consent from parents and caregivers of participating children in the trial

Successful blinding of patients or practitioners in a trial involving a physical intervention such as chiropractic care is virtually impossible.18 This is due to the manual nature of the interventions and the challenges associated with providing appropriate sham procedures.18, 19 However, participants in this trial are highly likely to be naïve to chiropractic care so it is possible they will remain unaware of whether they are in the chiropractic or control group. Some study personnel will be aware of the allocated arm as they will be responsible for logistical aspects of the trial. However, the research specialist collecting and analyzing data during the trial will be blinded to group allocation.