What is the difference between hemiplegia and diplegia?

Answer 1

Hemiplegia is a condition where there is paralysis in one vertical half of a patient's body.

Quadriplegia, also known as tetraplegia, is a symptom in which a human experiences paralysis affecting all four limbs, although not necessarily total paralysis or loss of function.

Paraplegia is an impairment in motor and/or sensory function of the lower extremities. It is usually the result of spinal cord injury or a congenital condition such as spina bifida which affects the neural elements of the spinal canal. The area of the spinal canal which is affected in paraplegia is either the thoracic, lumbar, or sacral regions. If the arms are also affected by paralysis, tetraplegia is the proper terminology.

(Yahoo answers)

Answer 2

I don't know the exact cause for both, but if you want to know how to differentiate the two when it comes to sign & symptoms.

Diplegia - involves both (LE) lower extremities more than (UE) upper extremities.

Paraplegia - is a complete paralysis of of the LE only.