VIPER: Veterans Integrated Pain Evaluation Research

Inclusion Criteria: * Male and female active duty military personnel age 18 years and older undergoing treatment at WRAMC and future WRNMMC with the diagnosis of post injury amputation of 1 limb, more than 3 but less than 18 months prior to enrollment. In particular, phantom limb pain patients will be included Exclusion Criteria: * Severe Traumatic Brain Injury (Primary major head trauma and diagnosis of traumatic brain injury resulting in documented, permanent or prolonged cognitive deficits that would preclude participation in the study (i.e. decreased intellectual capacity, marked memory deficits, or inability to communicate verbally or in writing) * Significant cognitive deficits that would preclude participation in the study. * Substantial hearing loss without alternative means of communication. * Documented spinal cord injury with permanent or persistent deficits. * Diagnosis of fibromyalgia or other chronic pain syndrome such as chronic headaches. * Evidence of ongoing tissue damage pain, infection, bone spur, or poorly fitting prosthesis.