References
Footnotes
Sources
External links

Achromatopsia at MedicineNet
Achromatopsia at Merriam-Webster
Achromatopsia at NCBI
The Achromatopsia Network - an archive of information about Achromatopsia and advice on coping with the condition.
Related disorders
Kyphosis
Scoliosis
Brain herniation
Spina Bifida
Ehlers-Danlos syndrome
Klippel-Feil syndrome
Syringomyelia

Cause
Tethered spinal cord can be caused by various conditions but the main cause is when tissue attachments limit the movement of the spinal cord in the spinal column which causes abnormal stretching of the cord. The tethered spinal cord syndrome is correlated with having the causes:
Spina bifida
Occulta
Mylomeningocele
Meningocele
History of spinal trauma
History of spinal surgery
Tumor(s) in the spinal column
Thickened and/or tight filum terminale
Lipoma(s) in the spinal column
Dermal Sinus Tract (congenital deformity)
Diastematomyelia (split spinal cord)Tethered spinal cord is a disorder and not a mechanism so it does not spread to other people and there are no measures that can be done to prevent it beforehand. The only preventative measure that is successful is to surgically untether the spinal cord though there might already be irreversible damage. Spina bifida
In tethered spinal cord cases spina bifida can be accompanied by tethering of the spinal cord but in rare cases with Spina bifida occulta. Tethering of the spinal cord tends to occur in the cases of Spina bifida with mylomeningocele. In most people the spine grows faster than the spinal cord during development which causes the end of the spinal cord to appear to rise relative to the bony spine next to it. By the time of birth the spinal cord is located between L1 and L2. In a baby with Spina bifida the spinal cord is still attached to the skin around it preventing it from rising properly.