What does diplegia mean?
Diplegia is a medical term describing paralysis that affects corresponding parts on both sides of the body — most commonly both legs, though it can also involve both arms. It derives from Greek roots meaning 'double' and 'stroke' or 'paralysis', placing it in the same family as hemiplegia, paraplegia, and quadriplegia. In modern clinical practice, the word is most often encountered in the phrase 'spastic diplegia', a form of cerebral palsy in which stiffness and weakness affect the legs significantly more than the upper body. People with this condition may have difficulty with balance and walking, yet their arm function and cognition are frequently unaffected. Because it is a specialist term, diplegia belongs chiefly to formal and clinical registers rather than everyday speech, but it remains essential vocabulary in medicine, rehabilitation, and disability advocacy.
nounParalysis affecting corresponding parts on both sides of the body, such as both arms or both legs; the term is used especially for a form of cerebral palsy in which the legs are primarily affected.
- Symmetrical paralysis or weakness of corresponding parts on both sides of the body, especially both legs, as in spastic diplegia associated with cerebral palsy.
"Spastic diplegia affects muscle control in both legs while leaving the arms largely unimpaired."
"Children with spastic diplegia often walk on their toes because of tightness in the calf muscles."
"The neurologist diagnosed bilateral leg diplegia following the brain injury."
Rarely pluralized; the singular typically suffices even when discussing multiple patients.
"The clinic treats several types of childhood diplegias."
Diplegia comes from Greek roots meaning 'double stroke' — the same 'plegia' you find in paraplegia and quadriplegia.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diplegia
Diplegia comes from the Greek prefix di- meaning 'two' or 'double', combined with -plegia, from plege, meaning 'stroke' or 'paralysis'. It was formed on the model of earlier medical terms such as paraplegia and hemiplegia, which share the same Greek suffix. The word entered English during the nineteenth century as neurological classification became increasingly systematic, and it remains a standard term in clinical descriptions of bilateral limb paralysis.
How diplegia is actually used
Diplegia is a technical medical term used mainly by clinicians and specialists. It appears most frequently in discussions of cerebral palsy, where 'spastic diplegia' describes the common form affecting the legs more severely than the arms. It should not be confused with hemiplegia (one side) or paraplegia (lower body only).
Easily confused with diplegia
Paraplegia refers specifically to paralysis of the legs and lower body, typically from spinal cord injury, whereas diplegia refers to symmetrical paralysis of any matching pair of limbs, most often both legs, and is usually of cerebral origin.
Hemiplegia is paralysis of one side of the body, whereas diplegia affects corresponding parts on both sides.