How does the myelination process differ in the CNS and PNS?

Myelin is present in the central nervous system (CNS) and peripheral nervous system (PNS); however only the central nervous system is affected by MS. CNS myelin is produced by special cells called oligodendrocytes. PNS myelin is produced by Schwann cells.

How can you differentiate between a CNS and PNS problem?

The central nervous system (CNS) includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs.

What are the signs and symptoms of CNS?

Signs and symptoms Some of them are persistent headache; pain in the face, back, arms, or legs; an inability to concentrate; loss of feeling; memory loss; loss of muscle strength; tremors; seizures; increased reflexes, spasticity, tics; paralysis; and slurred speech.

How does myelination occur in peripheral nervous system?

Unmyelinated peripheral axons are invested with a single layer of Schwann cell cytoplasm. When a peripheral axon at least 1 to 2 µm in diameter triggers myelination, a Schwann cell wraps many layers of tightly packed cell membrane around a single segment of that axon.

What is myelin How does the myelination process differ in the CNS and PNS quizlet?

Myelin protects and electrically insulates fibers. It also increases the transmission speed of nerve impulses. In the PNS, myelin sheaths are formed by Schwann cells. In the CNS, oligodendrocytes form the myelin sheath.

Which of the following is a similarity between the central nervous system and the peripheral nervous system quizlet?

Which of the following is a similarity between the central nervous system and the peripheral nervous system? Their structures are composed of neurons and neuroglia.

What are some conditions that can affect the CNS or the PNS?

Infections, such as meningitis, encephalitis, polio, and epidural abscess. Structural disorders, such as brain or spinal cord injury, Bell’s palsy, cervical spondylosis, carpal tunnel syndrome, brain or spinal cord tumors, peripheral neuropathy, and Guillain-Barré syndrome.

Which of the following is a similarity between the central nervous system and the peripheral system?

What happens when the CNS is damaged?

The nervous system is fragile. It can be damaged, and it heals with great difficulty, if at all. This affects the brain’s ability to communicate with your muscles and sensory organs. Nervous system injuries can be painful, and cause weakness, tingling, numbness and even changes in blood circulation.

What are some disorders of the peripheral nervous system?

These include Sjogren’s syndrome, lupus, rheumatoid arthritis, Guillain-Barre syndrome, chronic inflammatory demyelinating polyneuropathy and vasculitis. Diabetes. This is the most common cause. Among people with diabetes, more than halfwill develop some type of neuropathy.

Which of the following is an effect of myelination?

Which of the following is an effect of myelination? Myelination increases the speed of conduction of action potentials.

How does the CNS know whether a stimulus is strong or weak?

The CNS determines a stimulus to be strong when the frequency, or rate, of action potential generation is high. Conversely, a low frequency, or rate, of action potential generation indicates weaker stimuli.