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.
Muscle weakness, or myasthenia, is a decrease in strength in one or more muscles. It is a common symptom of muscular, neurological and metabolic disorders.Muscular diseases, such as muscular dystrophy and dermatomyositis (disorder characterized by muscle inflammation), are common causes of muscle weakness.he autoimmune neuromuscular disorder known as myasthenia gravis is accompanied by muscle weakness along with drooping eyelids and double vision. Metabolic disorders, such as Addisonâs disease and hyperthyroidism, can lead to weakness in one muscle or a group of muscles.