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SSMT Class 221 > A & P 2 - Class 9 - CN V & VII, Roots, Rami, Intercostal Nerves > Flashcards

A & P 2 - Class 9 - CN V & VII, Roots, Rami, Intercostal Nerves Flashcards

1
Q

Name of CN V?

A

Trigeminal

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2
Q

Function of Trigeminal nerve?

A

touch, pain and temperature sensations and proprioception (muscle sense); chewing

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3
Q

CN V: motor, sensory or mixed?

A

mixed

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4
Q

The sensory part of the Trigeminal nerve consists of _____ branches.

A

3; ophthalmic nerve, maxillary nerve, mandibular nerve

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5
Q

CN V: sensory part: ophthalmic nerve: axons from?

A

scalp and forehead skin

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6
Q

CN V: sensory part: maxillary nerve: axons from?

A

lower eyelid, nose, upper teeth, upper lip, and pharynx

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7
Q

CN V: sensory part: mandibular nerve: axons from?

A

tongue, lower teeth, lower side of face

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8
Q

CN V: motor part: axons from?

A

somatic motor neurons that innervate muscles used in chewing

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9
Q

Name of CN VII?

A

Facial

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10
Q

Function of Facial nerve?

A

taste (anterior tongue), proprioception (muscle sense), touch, pain, temperature sensations; facial expressions, secretion of tears and saliva

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11
Q

CN VII: motor, sensory, or mixed?

A

mixed

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12
Q

CN VII: sensory part: axons from?

A

taste buds on anterior tongue AND proprioceptors in muscles of face and scalp

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13
Q

CN VII: motor part: axons from?

A

somatic motor neurons that innervate facial, scalp, and neck muscles plus parasympathetic axons that stimulate lacrimal (tear) glands and salivary glands

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14
Q

Name all the cranial nerves that are mixed.

A

V-Trigeminal, VII-Facial, IX-Glossopharyngeal, X-Vagus

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15
Q

Two bundles of axons, called ________, connect each spinal nerve to a segment of the cord by a series of small rootlets.

A

roots

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16
Q

What is another name for the posterior root?

A

dorsal

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17
Q

The posterior or dorsal root contains ONLY what type of axons?

A

sensory

18
Q

What is the purpose of the sensory axons in the dorsal root between the spinal cord and spinal nerve?

A

conduct nerve impulses for sensations from the skin, muscles and internal organs into the CNS.

19
Q

What is another name for the anterior root?

A

ventral

20
Q

The ventral or anterior root contains axons of…?

A

somatic motor neurons AND autonomic motor neurons

21
Q

What does the anterior root axons of somatic motor neurons conduct?

A

nerve impulses from the CNS to effectors (muscles and glands).

22
Q

What does the anterior root axons of autonomic motor neurons conduct?

A

smooth muscle, cardiac muscle and glands

23
Q

Spinal nerves are: motor, sensory, mixed?

A

mixed

24
Q

Define ramus?

A

soon after each spinal nerve emerges from the spinal cavity, it forms several branches, each of which is called a ramus.

25
Q

What does ramus mean?

A

Branch

26
Q

What is the function of the dorsal ramus?

A

Supplies somatic motor and sensory fibers to several smaller nerves. these smaller nerves, in turn, innervate muscles and skin of the posterior surface of the head, neck, and trunk.

27
Q

Remember: dorsal root ganglion =

A

Cell bodies of sensory neurons

28
Q

ALL ARE MIXED NERVES- ramus or root?

A

Ramus

29
Q

What is the name of the posterior branch of the Ramus?

A

Dorsal ramus

30
Q

The anterior branch of the Ramus?

A

Ventral ramus

31
Q

Do rami join together to form plexuses?

A

No

32
Q

Intercostal nerves include which spinal nerves?

A

The anterior rami of spinal nerves T2 - T12, where there is no plexus formation

33
Q

How are the intercostal nerves different than other spinal nerves?

A

They connect directly to the structures they supply in the intercostal spaces

34
Q

Where are the roots?

A

Inside of the vertebral canal where spinal nerves attach to the spinal cord

35
Q

Where is the only location outside of the spinal cord where sensory and motor fibers are bundled sparately?

A

Roots

36
Q

What type of fibers split away from the ventral ramus and head toward a ganglion of the sympthetic chain?

A

Autonomic motor fibers

37
Q

What is the difference between a ventral root and a dorsal root?

A

The dorsal root ONLY contains sensory axons; ventral root contains axons of somatic motor neurons and atonomic motor neurons

38
Q

What is the difference between a dorsal root and a dorsal rami?

A

Root is the connection between the spinal nerve and the spinal cord; ramus is the spinal nerve emerging from the spinal cavity to form a branch.

39
Q

What structures do dorsal rami innervate?

A

Deep Muscles and skin of the posterior surface of the head, neck and trunk.

40
Q

What do the ventral rami of T2 - T12 form and innervate?

A

Muscles of the anterior skin and thoracic area.

41
Q

What does plexus mean?

A

Braid or network

SSMT Class 221 (9 decks)

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