The conduction velocity of the ulnar, median and peroneal nerves was studied from birth to adult age in normal infants, children and adolescents. The method allowed measurements of the conduction velocity of the thickest and fastest conducting motor nerve fibres. In newborns the conduction velocity of all 3 nerves was roughly half of that of adults. The value for the ulnar nerve increased rapidly during the first 3 years. After that age it rose only slightly and between adolescence and adult age there was a significant reduction. The value for the median nerve increased
Underlying causes for a low white blood cell count can range from benign disorders, such as vitamin deficiencies, to more serious blood diseases, such as leukemia or lymphoma. A truly low white blood cell count also puts you at higher risk for infections â typically bacterial infections.
A high white blood cell count (leukocytosis) is most often due to an infection, but can occur during many different illnesses. Certain medications, such as oral corticosteroids, also increase the white blood cell count. A low white blood cell count (leukopenia) is less common.Certain medications, infections, inflammatory and autoimmune conditions, heavy alcohol use, and problems in the bone marrow can cause a low white blood cell count.. Roughly between 4,500 and 10,000 cells per microliter (one one-thousandth of a milliliter). The white blood cell count is part of a complete blood count (CBC), one of the most common blood tests. Automated cell counting machines count the number of cells present in a blood sample.