Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AP 2 > The Cranial Nerves > Flashcards

The Cranial Nerves Flashcards

1
Q

Twelve pairs of nerves that are associated with the brain.

A

Cranial Nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Cranial Nerve I

A

Olfactory Nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Origin and Course of the Olfactory Nerve

A

Arise in olfactory epithelium of nasal cavity. Passes through cribriform plate of the ethmoid bone and synapses in the olfactory bulb. The olfactory tract terminates in the primary olfactory cortex.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Function of the Olfactory Nerve

A

Purely sensory; carries afferent impulses for sense of smell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cranial Nerve II

A

Optic Nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Origin and Course of the Optic Nerve

A

Arise in the retina of the eye. Passes through the optic canal of the orbit. Converges to form the optic chiasma. Synapses at the thalamus. The optic radiation fibers run to the primary visual cortex.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Function of the Optic Nerve

A

Purely sensory; carries afferent impulses for vision.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cranial Nerve III

A

Oculomotor Nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Origin and Course of the Oculomotor Nerve.

A

Extends from the ventral midbrain and passes through the superior orbital fissure to the eye.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Function of the Oculomotor Nerve.

A

Chiefly motor neurons. Somatic motor fibers to inferior oblique; and the superior, inferior, and medial rectus muscles. Parasympathetic motor fibers to the sphincter pupillae and ciliary muscles. Sensory afferents from the skeletal muscles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Cranial Nerve IV

A

Trochlear Nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Origin and Course of the Trochlear Nerve

A

Emerges from dorsal midbrain and enter the orbit through the superior orbital fissure.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Function of the Trochlear Nerve

A

Primarily motor nerves. Somatic motor fibers to superior oblique muscle, which passes through pulley-shaped trochlea.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Cranial Nerve V

A

Trigeminal Nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

First Division of the Trigeminal Nerve

A

Ophthalmic Nerve (V1)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Origin and Course of the Ophthalmic Nerve

A

Run from face through superior orbital fissure to pons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Function of the Ophthalmic Nerve

A

Sensory, conveys impulses from anterior scalp, upper eyelid, nose, nasal cavity mucosa, cornea, and lacrimal gland.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Second Division of the Trigeminal Nerve.

A

Maxillary Nerve (V2)

19
Q

Origin and Course of the Maxillary Nerve

A

Runs from face through the foramen rotundum to the pons.

20
Q

Function of the Maxillary Nerve

A

Sensory, conveys impulses from nasal cavity mucosa, palate, upper teeth, skin of cheek, upper lip, lower eyelid.

21
Q

Third Division of the Trigeminal Nerve

A

Mandibular Nerve (V3)

22
Q

Origin and Course of the Mandibular Nerve

A

Passes through skull via foramen ovale.

23
Q

Function of the Mandibular Nerve

A

Sensory: Conveys impulses from anterior tongue, temporal region of the scalp, skin of the chin. Motor: muscles of mastication

24
Q

Cranial Nerve VI

A

Abducens Nerve

25
Q

Origin and Course of the Abducens Nerve

A

Leave inferior pons and enter the orbit via the superior orbital fissure.

26
Q

Function of the Abducens Nerve

A

Motor fibers to the lateral rectus muscle. Sensory fibers from the same muscle.

27
Q

Cranial Nerve VII

A

Facial Nerve

28
Q

Origin and Course of the Facial Nerve

A

Runs from pons, enters temporal bone via the internal acoustic meatus, emerges through stylomastoid foramen, continues to lateral aspect of the face.

29
Q

Function of the Facial Nerve

A

Mixed nerves. Chief motor nerves of the face. Sensory fibers of the same muscles. Parasympathetic motor impulses to lacrimal glands, nasal and palatine glands, and submandibular and salivary glands. Sensory impulses from taste buds of anterior two-thirds of the tongue.

30
Q

Cranial Nerve VIII

A

Vestibulocochlear Nerve

31
Q

Origin and Course of the Vestibulocochlear Nerve

A

Arise from hearing and equilibrium apparatus in the inner ear, passes through internal acoustic meatus to pons-medulla border.

32
Q

Function of the Vestibulocochlear Nerve

A

Mostly sensory, vestibular division transmits impulses for sense of equilibrium, cochlear division transmits impulses for sense of hearing. Motor component adjusts the sensitivity of sensory receptors.

33
Q

Cranial Nerve IX

A

Glossopharyngeal Nerve

34
Q

Origin and Course of the Glossopharyngeal Nerve

A

Emerges from the medulla and leaves skull via jugular foramen.

35
Q

Function of the Glossopharyngeal Nerve

A

Mixed nerve. Sensory motor fibers to and from stylopharyngeus, which elevates the pharynx during swallowing. Parasympathetic motor fibers to parotid glands. Sensory fibers conduct taste and general sensory impulses from pharynx and posterior tongue, chemoreceptor in carotid body which monitor O2 and CO2 levels and regulate respiratory function, baroreceptors of carotid sinus which monitor blood pressure.

36
Q

Cranial Nerve X

A

Vagus Nerve

37
Q

Origin and Course of the Vagus Nerve

A

Extends beyond the head and neck region. Emerges from the medulla, passes through skull via jugular foramen, descends into thorax and abdomen.

38
Q

Function of the Vagus Nerve

A

Mix nerve. Mostly motor fibers. Parasympathetic motor fibers supply heart, lungs, and abdominal viscera. Sensory impulses from thoracic and abdominal viscera, aortic arch baroreceptors, carotid and aortic bodies, taste buds on the epiglottis, skin on external ear. Proprioceptor fibers from muscles of larynx and pharynx.

39
Q

Cranial Nerve XI

A

Accessory Nerve

40
Q

Origin and Course of the Accessory Nerve

A

Rootlets emerge from spinal cord. Pass along spinal cord and enter skull via foramen magnum, exit skull through jugular foramen.

41
Q

Function of the Accessory Nerve

A

Mixed nerves. Motor fibers to trapezius and SCM muscles. Proprioceptor impulses from same muscles.

42
Q

Cranial Nerve XII

A

Hypoglossal Nerve

43
Q

Origin and Course of the Hypoglossal Nerve

A

Arise by series of roots from medulla and exit skull via hypoglossal canal to tongue.

44
Q

Function of the Hypoglossal Nerve

A

Mixed nerve, primarily motor. Somatic motor fibers to intrinsic and extrinsic muscles of tongue. Proprioceptors from same muscles.

AP 2 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions