Unit 3 Discussion Throughout this unit we have been learning about the nervous a

Question

Unit 3 Discussion Throughout this unit we have been learning about the nervous and muscular systems. Choose a disorder of one or both of these systems and discuss a disorder of them. Many disorders involve both systems. For full credit you must post an original response of 150 words and respond to 2 other classmates with a minimum of 100 words. You will not be allowed to respond to other student's posts or view them until you have made your initial post Be certain you complete this before exam 3

Explanation / Answer

Ans: Neuromuscular disorders affect both nerves and muscles. Neuromuscular disorders affect the nerves that control the voluntary muscles. Motor neurons or the nerve cells present in the brain and spinal cord results in muscular contraction. Voluntary muscles activities are controlled by these cells including speaking, walking, breathing, swallowing and general movement of the body. Nerve cells called as neurons send the signals which control these muscles. When the neurons start deteriorating or began to die the contact between the nervous system and muscles crack down. As a result muscles weaken and results in motor neuron disease. The weakness results in twitching, cramps, aches and pains and joint and movement problems. It also affects heart function and the ability to breathe.

One of such neuromuscular disorders is multiple sclerosis which means the scare tissue in multiple areas. Since myelin covers the nerve fibers sheath but in case of multiple sclerosis this myelin sheath disappears at multiple areas leaving behind a scar or sclerosis results in damaged nerve cells. And therefore, the electrical impulses from the brain do not reach the target muscles and there is no conduction. Symptoms include muscle weakness, problems with thinking and memory and difficulties with co-ordination and balance. Multiple sclerosis causes bladder problems, fatigue, vertigo, vision problems etc. Main causes includes autoimmune disorder in which immune system attack the myelin sheat as a foreign body and destroys it and exposure to a toxic substance along with genetic factors. And the treatment includes the suppression of autoimmune response.

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