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.
Human immunodeficiency virus (HIV) is a less common cause of muscle weakness but should be considered in patients with associated risk factors or symptoms.6, 9 Neurologic conditions that can cause weakness include cerebrovascular disease (i.e., stroke, subdural/epidural hematomas), demyelinating disorders (i.e., multiple sclerosis, Guillain-BarrÃ© syndrome), and neuromuscular disorders (i.e., myasthenia gravis, botulism).