Eventually, the bronchi become known as bronchioles â the smallest air tubes in the lungs. This system of air tubes can be thought of as an upside down tree, with the trachea being the main trunk and the bronchi and bronchioles being the branches. The medical term for all the air tubes is 'the respiratory tract'.
An injury to the vertebrae or discs in your neck can cause pain, numbness, or weakness in your shoulder, arm, wrist, or hand because the nerves that extend out from between the neck provide sensation and allow for movement in these areas.
What causes it? The most common causes of knee weakness are osteoarthritis, sprain or strain, and chronic knee pain. Within all the people who go to their doctor with knee weakness, 89% report having knee pain, 47% report having knee swelling, and 20% report having leg weakness.