 The patient is a 78-year-old right-handed inpatient with longstanding history of cervical spinal stenosis status post decompression, opioid dependence, who has had longstanding low back pain radiating into the right leg.  She was undergoing a spinal epidural injection about a month ago and had worsening of right low back pain, which radiates down into her buttocks and down to posterior aspect of her thigh into her knee.  This has required large amounts of opioid analgesics to control.  She has been basically bedridden because of this.  She was brought into hospital for further investigations.