<P> DAI is characterized by axonal separation , in which the axon is torn at the site of stretch and the part distal to the tear degrades . While it was once thought that the main cause of axonal separation was tearing due to mechanical forces during the trauma , it is now understood that axons are not typically torn upon impact ; rather , secondary biochemical cascades , which occur in response to the primary injury ( which occurs as the result of mechanical forces at the moment of trauma ) and take place hours to days after the initial injury , are largely responsible for the damage to axons . </P>
<P> DAI is characterized by axonal separation , in which the axon is torn at the site of stretch and the part distal to the tear degrades . While it was once thought that the main cause of axonal separation was tearing due to mechanical forces during the trauma , it is now understood that axons are not typically torn upon impact ; rather , secondary biochemical cascades , which occur in response to the primary injury ( which occurs as the result of mechanical forces at the moment of trauma ) and take place hours to days after the initial injury , are largely responsible for the damage to axons . </P>
when do symptoms of axon damage show up
when do symptoms of axon damage show up
hours to days after the initial injury
hours to days after the initial injury