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A&P > The 12 cranial nerves > Flashcards

The 12 cranial nerves Flashcards

1
Q

What are cranial nerves?

A

Nerves that originate from the brain or brain stem

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2
Q

How might you see Cranial nerves abreviatted?

A

CN then whatever number that nerve is with roman numurals

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3
Q

How are they numbered?

A

They are numbered based on where they emerge(front to back)

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4
Q

What do the cranial nerves do?

A

Relay information to/from various parts of the body to the brian

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5
Q

What has to be there for this relay of information to take place?

A

Nerons

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6
Q

What are the two nerons that help it take place?

A

Afferent and Efferent

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7
Q

What is Afferent?

A

Sensory neurons that are carrying signals from various stimulus stimuli back towards the brain

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8
Q

What is Efferent?

A

Motor nerons that carry signals away from the brain to either have some effect on mucel or some other target cells

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9
Q

What is CNI? Where is it located? Is it sensory or motor? What is it for?

A

Olfactory its in the cerebrum section of the brain its a sensory neron that is used for olfaction(smelling)

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10
Q

What is CNII? Where is it located? Is it motor or sensory? WHat is it for?

A

Optic its located in the cerebrum section of the brain its a sensory neron that is used for vision

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11
Q

What is CNIII? Where is it located? Is it motor or sensory? WHat is it for?

A

Occlulomotor its located in the midbrain its a motor neron thats used for eye movement including eyelid elevation, pupillary construction, lens accomodation(reshaping of the eye)

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12
Q

***What is CNIV? Where is it located? Is it motor or sensory? WHat is it for?

A

Trochlear its located in the midbrain its a motor neron thats used for eye movement moving depression abduction(eye down and out) and inward rotation of the eye

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13
Q

What is CNV? Where is it located? Is it motor or sensory? What is it for?

A

Trigeminal its located in the pons its both a sensory and motor neron the sensory is facial with is divided into 3 parts(V1, V2, V3) and the anterior 2/3 of the tongue(front 2/3) the motor is mastication(biting and chewing)

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14
Q

***What is CNVI? Where is it located? Is it motor or sensory? WHat is it for?

A

Abducens its located in the ponto medullary its a motor neron thats used for eye movement abduction of the eye

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15
Q

What is CNVII? Where is it located? Is it motor or sensory? WHat is it for?

A

Facial its located in the ponto medullary its a sensory and motor neron the sensory is the taste of the anterior 2/3 of the tongue(front 2/3) and the motor is facial expressions, eyelid closing, salvaton, and lacrimation(tear production)

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16
Q

What is CNVIII? Where is it located? Is it motor or sensory? WHat is it for?

A

Vestibulocochlear(auditory nerve) its located in the ponto medullary its a sensory neron and its for balance and hearing

17
Q

What is CNIX? Where is it located? Is it motor or sensory? WHat is it for?

A

Glossopharyngeal its located Medulla oblongata its both a sensory and motor neron
Sensory- sensation/taste posterior 1/3 of the tongue(back 1/3) and sensation of the pharynx and input from the sinuses, carotid chemo, and baroreceptors
Motor- swallowing, salivution

18
Q

What is CNX? Where is it located? Is it motor or sensory? WHat is it for?

A

Vagus(longest nerve) its located in the Medulla oblongata its both a sensory and motor neron
sensory- sensation from pharynx, larynx, thorax, and abdomen coming from the visceral tissues and taste and sensation of the epiglottis(flap of tissue under the tongue at the back of the throat)
motor- swallowing speech coughing and apart of the autonomic function in particular the parasympathetic nervous system that’s gonna have an effect of decreased heart rate and increase gi motility(gastrointestinal system) and sweating

19
Q

What is CNXI? Where is it located? Is it motor or sensory? WHat is it for?

A

Accessory(spinal accessory nerve) its located in the Medulla oblongata and the cervical spinal cord its a motor neron and its for shrugging your shoulders and turning your head

20
Q

What is CNXII? Where is it located? Is it motor or sensory? WHat is it for?

A

Hypoglossal its located in the Medulla oblongata its a motor neron its for the muscels underneath the tongue responsible for tongue movement

A&P (8 decks)

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