How to Increase White Blood Cells. Leukocytes or white blood cells typically make up 4000-10,000 WBCs for every microliter of blood. If your white blood cell count drops below 3500 WBCs for every microliter of blood it causes a condition called leukopenia that causes cramps, fever, sore gums, diarrhea, sneezing, headaches, sore throat, etc. These are signs that your immune system is weak and you are susceptible to infection.
General Information. 1  Schwannomas are benign tumors of the nerve sheath that grow slowly and push nerve fibers aside. 2  Schwannomas can arise from any peripheral nerve containing Schwann cells, including cranial nerves. 3  The eighth cranial nerve is the most susceptible to schwannomas.
Manifest-latent nystagmus is continually present, but worsens when one eye is covered. Acquired nystagmus can be caused by a disease (multiple sclerosis, brain tumor, diabetic neuropathy), an accident (head injury), or a neurological problem (side effect of a medication). Hyperventilation, a flashing light in front of one eye, nicotine and even vibrations have been known to cause nystagmus in rare cases.