Defects of nervous system, Biology

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DEFECTS OF NERVOUS SYSTEM -

1.      Ataxia - Lack of muscle-cordination due to damage of cerebellum.

2.      Dyslexia - In ability of a person to comprehense written language.

3.      Aphasia - Due to defect of wernickles area inability to coordinate the understanding of speach & producing sound.

4.      Parkinson's disease - Due to lack of dopamine. Characterised by rigidity of musculature, involuntary tremors when person is in resting state, seirous difficulty in initiating movement called akinesia, treated by drug L-dopa.

5.      Schizophrenia - Caused by excess secretion of dopamine characterized by incoherent speech, broken ideas, abnormal sequence of thoughts, intense fear & unreal feelings.

6.      Huntington's chorea - Characterized by Hicking movement at certain points due to loss of GABA & acetylcholine secreting hormone.

7.      Multiple sclerosin - Due to damage of myelin sheath of nerve cell, this result in neuron death leading to slurred speech & paralysis.

8.      Epilepsy - Characterized by periodic seizures when a large number of neurons fire spotaneously.

9.      Analgesi - Loss of pain without loss of tectile sense.

10.     Pain in nervous system is neuroglia.

11.     Inflamation of nervous system is neuritis.

12.     Coma - Complete loss of conciousness.

13.     Insomonia - In ability of sleep when sleep is desired.

14.     Myelitis - Inflamation of spinal cord.


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