The treatment is carried out while your child is under asleep (with anaesthesia) and takes around 4 hours.
A cut in the skin is made in the spine around about waist level. The muscles covering the spinal column are moved out of the way. A small part of bone is removed to gain access to the nerves in the spinal canal. It is kept to be put back in place after the treatment (this is called a laminoplasty).
There is a thin membrane which covers the spinal cord which is opened to allow access to the sensory nerve roots.
Sensory roots cause the spasticity seen in some children with cerebral palsy. Each of the sensory nerve roots is then split into a smaller rootlets. Each rootlet is stimulated. This is to show the ones that contribute most to the movement of your child's lower limbs. These rootlets are then cut.
The process is done again for all the other nerve roots on both legs. The aim is to cut the right number of sensory rootlets to lessen muscle tightness.
At the end of the surgery the membrane which covers the spinal cord is closed up again. The removed section of bone is put back into place and secured. The spine muscles are also put back in place. The skin is closed with stitches which will dissolve over time.