Peripheral Nervous System Flashcards

1
Q

Plexus

A

A network of interconnecting nerves

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2
Q

Dermatome

A

An area of skin that is supplied by a single spinal nerve

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3
Q

Myotome

A

Group of muscles innervated by a single spinal nerve

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4
Q

Visceral efferent nerves can be divided into . . .

A

Sympathetic and parasympathetic

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5
Q

. . . efferent nerves innervate the viscera (organs) and periphery (vasculature and sweat glands)

A

Sympathetic

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6
Q

. . . efferent nerves innervate the viscera (organs) only

A

Parasympathetic

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7
Q

Ganglion

A

A collection of cell bodies outside the CNS

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8
Q

Nucleus

A

A collection of cell bodies inside the CNS

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9
Q

Where do afferent fibres have their cell bodies?

A

Spinal ganglia

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10
Q

Visceral afferent nerves carry information from the . . .

A

Viscera (thoracic, abdominal and pelvic organs)

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11
Q

How is the conduction velocity of a peripheral nerve classified?

A

Letters A, B, and C

A is the fastest

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12
Q

How is the axonal diameter of a peripheral sensory nerve classified?

A

Roman numerals I-IV

I is the largest

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13
Q

What are the 3 layers of connective tissue in a peripheral nerve, and where are they located?

A

Epineurium - External layer
Perineurium - Covering individual fascicles
Endoneurium - Covering individual axons

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14
Q

How are peripheral nerves arranged?

A

Into fasciculi

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15
Q

What are the two types of internal receptor?

A

Proprioceptor - movement and joint position

Enteroceptor - movement through guts and blood pH

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