Myelopathy myo-lop-a-thee. Myel ['spinal cord'] opathy ['problem'] is a disease of the spinal cord. This can be distingiushed from a radiculopathy or neuropathy based on the symptoms and findings during a doctors examination. Myelopathy is therefore a descriptive term and many different disease processes can cause it.
Taekwondo is a martial art that was developed by the Koreans with tactical preferences for kicks over hands (although both are included), while Karate is a Japanese development of hand fighting which was refined in Okinawa, and likely brought there from early hand fighting in China.
The difference between power yoga and any other form of yoga is the intensity of work involved.. power yoga is an athletic form of yoga more than hatha yoga or any other gentle yoga style.