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Anatomy Final > Peripheral nervous system > Flashcards

Peripheral nervous system Flashcards

1
Q

How many pairs of spinal nerves are there

A

thirty one pairs connected to the spinal cord

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2
Q

How many cranial nerves are there

A

twelve paired

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3
Q

Cervical nerves

A

Eight pairs located C1 through C 8

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4
Q

Thoracic nerves

A

twelve pairs located at T1 through T 12

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5
Q

Lumbar nerves

A

5 Pairs located L1 through L5

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6
Q

Sacral nerves

A

Five pairs located s1 through s5

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7
Q

coccygeal

A

one pair

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8
Q

What are nerve plexus

A

Networks formed by ventral rami of most spinal nerves, just not thoracic, which subdivide and join to form to form individual nerves

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9
Q

What do cervical plexus nerves do

A

Supply sensory and motor innervation to the head, neck and trunk

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10
Q

What provides motor innervation to the upper limbs

A

brachial plexus

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11
Q

What provides motor innervation to the lower limbs

A

lumbar plexus

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12
Q

What do nerves of the sacral plexus do

A

They provide sensory and motor innervations to the posterior thighs, legs, feet and pelvis

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13
Q

What does the coccygeal plexus do

A

Provides sensory innervations to the skin over the coccyx and the perianal region

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14
Q

What is dermatome

A

a region of the skins surface supplied by afferent fibers of a specific spinal nerve

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15
Q

What is a myotome

A

skeletal muscle supplied by efferent fibers of a specific spinal nerve

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16
Q

What cranial nerves are only sensory

A

Olfactory (Conducts sensory for smell), optic nerve, vestibulocochlear deals with hearing and equilibrium

17
Q

What cranial nerves are only motor

A

Oculomotor nerve and trochlear nerves and abducens nerve (control eye movements), spinal accessory (controls sternocleidomastoid and trapezius muscles), Hypoglossal nerve (tongue movements)

18
Q

What cranial nerves are mixed nerves

A

Trigeminal (conducts sensory signals from the face, scalp and teeth, also control the chewing muscles), facial nerves (conduct sensory signals for taste and motor signals that control facial expressions), glossopharyngeal (control swallowing and signals for mouth throat and ear), vagus nerve (signals for head neck chest abdomen and throat, heart and digestive.

19
Q

What are the two divisions of peripheral nervous systems

A

Afferent (sensory) divisions and the efferent (motor division)

20
Q

What are efferent divisions

A

include the somatic motor, nervous system and automatic nervous systems

21
Q

What is the difference between somatic and automatic reflexes

A

somatic reflexes use skeletal contractions, autonomic reflexes involve smooth muscle and cardiac muscle as well as secretion by glands.

22
Q

what are withdraw reflections

A

when the body twitches from stimuli, muscles contract, crossed extensor reflex causes contractions of the extensor muscles on opposite sides of the stimulus

23
Q

WHat does the knee jerk reflex do

A

causes extensions of the leg

24
Q

Spinal cord reflex

A

located in gray spinal cord matter

25
Q

segmental reflex

A

nerve impulses enter and leave at the same spinal cord segment

26
Q

ipsilateral reflex

A

nerve impulse come and go to the same side of the body

27
Q

stech or myotatic reflex

A

stimulus that causes reflexive stretching of the tendon

28
Q

extensor reflex

A

produced by the extensor muscles of the leg

29
Q

deep tendon reflex

A

stimulation of deep sensory receptors produces the reflex (ankle jerk reflex)

30
Q

plantar reflex

A

stimulation of the outer sole, causes feet to point down and inward

31
Q

Babinski sign

A

toe curling response

32
Q

corneal reflex

A

closing of eye when touched

33
Q

abdominal reflex

A

when the abdominal wall goes inward due to stimulation

34
Q

superfical reflex

A

occurs when skim is stimulated

Anatomy Final (5 decks)

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