Recurrent episodes of neurological dysfunction

Reference no: EM133675043

Question

SK is a 28-year-old female who has had recurrent episodes of neurological dysfunction. Four years ago, she experienced visual clouding and ataxia that persisted for several days before completely resolving. Eighteen months ago, she developed an intension tremor in her left hand that also resolved within a few weeks. Currently, SK is experiencing fatigue, a loss of balance, impaired gait, nystagmus, and mood swings. Magnetic resonance imaging (MRI) studies revealed multiple lesions in the white matter of the brain, spinal cord, and the optic nerve.

Discuss the action potential and describe how it works in a muscle cell.

1. At what age are patients typically diagnosed with multiple sclerosis? Is this disease more prevalent in men or women?

2. What is the source of myelin in the central nervous system? In the peripheral nervous system?

3. Why are neuronal axons covered with myelin referred to as white matter? What is the composition of this substance?

4. What makes up the grey matter of the brain tissue?

5. How has the transmission of electrical impulses been affected by the demyelination?

Reference no: EM133675043

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