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.
Causes of Muscle weakness. Muscle weakness may be caused by a variety of diseases and conditions, including low sodium or potassium, amyotrophic lateral sclerosis, cerebral palsy, multiple sclerosis, pinched nerve, muscular dystrophy and poisoning.uscle weakness may be caused by a variety of diseases and conditions, including low sodium or potassium, amyotrophic lateral sclerosis, cerebral palsy, multiple sclerosis, pinched nerve, muscular dystrophy and poisoning.