background: axotomy causes sensory neuronal loss. reconnection of proximal and distal nerve ends by surgical repair improves neuronal survival. it is important to know the morphology of primary sensory neurons after the surgical repair of their peripheral processes. methods: animals (male wistar rats) were exposed to models of sciatic nerve transection, direct epineurial suture repair of sciati...

traumatic brain injury (tbi) is one of the major causes of severe disability and death in the entire world that accidents are mentioned as main factors of it. tbi lead to primary and secondary injuries.  primary injuries are created immediately after accidents or bleeding but the secondary injuries are created by complicated process of cellular and molecular responses following primary injury a...

Introduction: Brain injury induces an almost immediate response from glial cells, especially astrocytes. Activation of astrocytes leads to the production of inflammatory cytokines and reactive oxygen species that may result in secondary neuronal damage. Melatonin is an anti-inflammatory and antioxidant agent, and it has been reported to exert neuroprotection through the prevention of neuronal d...

Background: Axotomy causes sensory neuronal loss. Reconnection of proximal and distal nerve ends by surgical repair improves neuronal survival. It is important to know the morphology of primary sensory neurons after the surgical repair of their peripheral processes. Methods: Animals (male Wistar rats) were exposed to models of sciatic nerve transection, direct epineurial suture repair of sciati...

penheim, 1991; Burek and Oppenheim, 1998). Although Neurons may die at many different developmental stages some of these hypotheses have received experimental and for many different reasons. As in other tissues, difsupport in individual systems, none seems to be generferent stimuli produce quite different morphological ally applicable. Indeed, it remains to be demonstrated that manifestations o...