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.
The main cause of a low platelet count in the blood is bone marrow problems, like anemia and leukemia. Other viral infections too, can affect the bone marrowâs ability to produce the adequate supply of platelets. Some of the other common causes of low platelet count are. 1  Pregnancy. 2  The use of certain medication. 3  Hemolytic uremic syndrome.  Thrombotic Thrombocytopenic Purpura 1  (ttp) Autoimmune diseases.  The presence of bacteria in the blood.