Role of nerves - regeneration, Biology

Role of Nerves - Regeneration

It has been seen that soon after amputation nerves invade the regeneration blastema. If the stump is denervated by cutting the nerves supplying the limb as they come out from the spinal cord, and are avoid from regrowing into the site of amputation them regeneration fails to take place. The apical cap is not formed. In larval urodeles, denervation results in large scale regression of stump tissues and the whole limb stump may disappear. If the nerve fibers are allowed to regrow into the stump earlier than a thick skin forms on the wound surface regeneration may be re-initiated. These studies have displayed with certainty that the existence of nerves is essential for regeneration of the limb.

A number of experimental studies have been made to know the nature and mechanism of nerve influence on limb regeneration in urodeles. The nerves are believed to generate a "trophic influence" on the blastema cells of the regenerating limb. This neurotrophic effect has been emerge to be produced by all nerves, if motor or sensory or central irrespective of whether they have functional relationship with the central nervous system or not. Grafting of spinal ganglia in the regenerating area of limbs, whose own nerves have been cut and severed, also promote regeneration. Though, it has been found that the presence of a minimum number of nerve fibers is essential for regeneration. Below this threshold regeneration does not take place.

Posted Date: 1/31/2013 4:47:25 AM | Location : United States







Related Discussions:- Role of nerves - regeneration, Assignment Help, Ask Question on Role of nerves - regeneration, Get Answer, Expert's Help, Role of nerves - regeneration Discussions

Write discussion on Role of nerves - regeneration
Your posts are moderated
Related Questions
a) Why are grasshopper and Drosophila said to show male heterogamity? Describe. b) Define female heterogamity with the help of an example.

Q. What is the relation between fecundation and the end of the meiotic process during oogenesis? The oocyte II only completes the second meiotic division (interrupted at metaph

Q. Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, circulation, skin, nitrogen waste, respiration, thermal

What is the difference between facultative anaerobic beings and obligate anaerobic beings? Facultative anaerobic beings, such as the fungi Saccharomyces cerevisiae, a brewing y

Enumerate about the diseases Insomnia The results from studies of people, who claim that they do not sleep, or wake up frequently from sleep show that their insomnia can have m

Explain intravascular fluid compartment - extracellular fluid? The extracellular fluid compartment is sub-divided into the intravascular fluid compartment (fluid within the blo

A cell frequently wants to secrete larger molecules than can be accommodated through the transport systems dealt with in Topic E3. Exocytoses get to the movement of proteins out of

Respiration - Metabolism of Pollen Tubes In the unpollinated pistils of Hippeastrum hybridum very high O 2 , tension exists from stigma down through most of the style. During

Define Skirt Fold Thickness (SPT) Method? Skin fold measurement is the most widely used field method of body composition assessment. The skin fold (SKF) is an indirect measu

What is the functional unity of the kidneys? The functional (filtering) unity of the kidneys is the nephron. A nephron is made of afferent arteriole, efferent arteriole, glomer