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Nervous System and Integument > 1.2 Peripheral Nerves and Control > Flashcards

1.2 Peripheral Nerves and Control Flashcards

1
Q

How many pairs of cranial nerves are there?

A

12

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2
Q

Cranial Nerve I :

A

Olfactory
Location: Forebrain
- smell sensory

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3
Q

Cranial Nerve II :

A

Optic nerve
Location : Forebrain
vision sensory

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4
Q

Cranial Nerve III :

A

Oculomotor
Location: midbrain
- Controls movement of the eyeball
- levator palpebrae superioris (LPS) : muscle that lifts up eyelid
- Carry’s parasympathetic fibers to ciliary muscles and pupil

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5
Q

Cranial Nerve IV :

A

Trochlear
Location: midbrain
- only controls dorsal oblique
- decussation: in brain before coming out
- only nerve that comes from dorsal brain stem

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6
Q

Cranial nerve V :

A

Trigeminal
Location: hindbrain
- one of the largest nerves
- both motor and sensory

sensory to face
motor ro jaw

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7
Q

Trigeminal nerve motor component includes:

A

muscles of mastication
masseter, temporalis, pterygoids,
rostral digastricus
- mylohyoideus
- tensors palatini and tympani (ear)

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8
Q

Trigeminal nerve sensory component includes:

A

Almost all face and ear canal

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9
Q

Trigeminal nerve (V): 3 roots

A
  • V1 Ophthalmic branch - sensory only
  • V2 maxillary branch - sensory only
  • V3 mandibular branch - mixed
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10
Q

V1 contains:

A
  • frontal
  • lacrimal
  • infratrochlear
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11
Q

V2 contains:

A
  • infraorbital
  • zygomatic
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12
Q

V3 contains:

A
  • mental formen
  • buccinator
  • (mylo-hyoid)
  • auriculotemporal
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13
Q

Cranial nerve VI :

A

Abduncens
Location - hindbrain
- lateral rectus: pulls eye away from midline
- retractor bulbi: pulls eye inward

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14
Q

Cranial nerve VII :

A

Facial nerve
Location: hindbrain
- muscles of facial expressions
- receives sensory from the ​outer ear
-taste buds on 2/3 of tongue
- Motor and sensory
- Parasympathetic to glands: taste sensation

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15
Q

Cranial nerve VII motor function:

A

-muscles of facial expression
-caudal belly of digastric (equines)
- stapedius mm.

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16
Q

Cranial nerve VII sensory function:

A

Sensory (ear)

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17
Q

Cranial nerve VII special sense:

A

Taste - passes through mid-ear to tongue
- damage to the mid-ear can cause loss of taste​

18
Q

Carnial nerve IX:

A

Glossophargeal nerve
Location: hindbrain
- innovates the tongue important for taste
- motor / sensory to pharynx, parasymp. to glands, taste sensation

19
Q

tongue pain and perception =

A

Cranial nerve V

20
Q

Tongue taste =

A

cranial nerve VII and IX

21
Q

Cranial nerve X :

A

Vagus Nerve
Location: hindbrain
- motor & sensory
- parasympathetic to pharynx, larynx, heart, abdomen
- begins in head and ends at colon

22
Q

Cranial nerve XI :

A

Accessory nerve
Location: hindbrain
- motor to shoulder
- Cranial root and spinal root

23
Q

Cranial nerve XI: cranial root

A

may supply recurrent ± cranial laryngeal fibres

24
Q

Cranial nerve XI: spinal root

A

runs cranially along spinal cord → re-enters cranium through foramen magnum → exits cranium with XIcranial root → neck and shoulder mm.

25
Q

Cranial nerve XII :

A

Hypoglossal nerve
Location: hindbrain
- innovates extrinsic muscles of the ​tongue/ responsible for tongue movement

26
Q

What do nerves III, VII, IX, and X have in common?

A

they all carry parasynthetic​ fibers

27
Q

What nerve sits in front of the pituitary gland / Hypthalmus?

A

Cranial nerve II

28
Q

All spinal nerves are ___ in composition?

A

mixed in composition (sensory and motor)

29
Q

Cranial nerves can be what in composition?

A

Mixed
Purely sensory
Purely motor

30
Q

General somatic motor (GSM)

A

skeletal muscle, spinal nerve

31
Q

General visceral motor (GVM)

A

autonomic (smooth muscle), spinal nerve

32
Q

General somatic sensation (GSS)

A

skin, proprio, spinal nerve

33
Q

General visceral sensation (GVS)

A

viscera, spinal nerve

34
Q

What are the 3 cranial never types?

A
  • special visceral motor (SVM)
  • Special somatic sensory (SSS) - eye, ear
  • Special visceral sensory (SVS) - mouth, oral cavity, sense of taste
35
Q

Where are motor nerves​ located?

A

more mediallly

36
Q

Where are Sensory nerves located?

A

more laterally

37
Q

Label the motor and sensory nerves

A
  1. GSM -goes into skeletal muscle
  2. SVM
  3. GVM - smooth muscle in visceral structure
  4. GVS - sensory to gut
  5. SSS/SVS
  6. GSS - skin somite
38
Q

Cranial Nerve VIII:

A

Vestibulocochlear:
Location: Hindbrain
- hearing
- balance sensory

39
Q

What nerve forms early in development, and connects to the ​piriform lobe?

A

Cranial Nerve I

40
Q

What nerve begins in the Retina?

A

Cranial Nerve II

Nervous System and Integument (8 decks)

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