Peripheral nerve and Skeletal Flashcards

0
Q

Axon and myelin sheath undergoes anterograde degeneration

A

Axonal degeneration

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1
Q

Random myelin internodes are injured and remyelinated by multiple schwann cells, axon and myocytes are intact.

A

Segmental demyelination

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2
Q

Sprouting of adjacent uninjured motor axons leads to myocyte fiber type grouping.

A

Reinnervation

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3
Q

Scattered myocytes of different motor units are small while the neurons and nerve fibers are normal.

A

Myopathy

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4
Q

Determine the type of muscle fiber types:

Action: sustained force

A

Type 1

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5
Q

Determine the type of muscle fiber types:

Action: sudden movement

A

Type 2

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6
Q

Determine the type of muscle fiber types:

Strength: purposeful motion

A

Type 2

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7
Q

Determine the type of muscle fiber types:

Strength: weight bearing

A

Type 1

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8
Q
Determine the type of muscle fiber types:
Enzyme content:
NADH dark staining
ATPase pH 4.2 dark staining
ATPase pH 9.4 light staining
A

Type 1

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9
Q
Determine the type of muscle fiber types:
Enzyme content:
NADH light staining
ATPase pH 4.2 light staining
ATPase pH 9.4 dark staining
A

Type 2

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10
Q

Determine the type of muscle fiber types:

Lipids: abundant

A

Type 1

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11
Q

Determine the type of muscle fiber types:

Lipids: scant

A

Type 2

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12
Q

Determine the type of muscle fiber types:

Glycogen: scant

A

Type 1

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13
Q

Determine the type of muscle fiber types:

Glycogen: abundant

A

Type 2

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14
Q

Determine the type of muscle fiber types:

Ultrastructure: many mitochondria with wide z-band

A

Type 1

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15
Q

Determine the type of muscle fiber types:

Ultrastructure: few mitochondria with narrow z band

A

Type 2

16
Q

Determine the type of muscle fiber types:

Physiology: slow twitch

A

Type 1

17
Q

Determine the type of muscle fiber types:

Physiology: fast twitch

A

Type 2

18
Q

Determine the type of muscle fiber types:

Color: red

A

Type 1

19
Q

Determine the type of muscle fiber types:

Color: white

A

Type 2

20
Q

This is caused by schwan cells dysfunction or primary myelin sheath damage, the underlying axon is normal.

A

Myelin loss in segmental demyelination