Cranial Nerves

Question 1

Optic Nerve (1)

Answer 1

Cranial nerve (1) is the olfactory nerve, a sensory nerve from nasal cavity to olfactory build to supply smell. 
Olfactory is a special sensory nerve (along with 2 - Optic & 8 - Vestibulochlear)

Question 2

Optic nerve (2)

Answer 2

Optic nerve (2) is a sensory nerve connecting to retina to supply vision.
Optic nerve  is a special sensory nerve (is a special sensory nerve, along with 1 - Olfactory & 8 - Vestibulochlear)

Question 3

Oculomotor nerve (3)

Answer 3

Oculomotor nerve (3) is a motor nerve for eyeball and eyelid movement, for constriction of pupil, for near vision (lens adjustment). Oculomotor (3) works with Tochlear (4) and Abducens (6) to move eye.

Question 4

Trochlear nerve (4)

Answer 4

Trochlear nerve (4) is a motor muscle for eye movement - with the superior oblique muscle. Trochlear nerve (4) works with Oculomotor (3) and Abducens (6) to move eye.

Question 5

Trigeminal nerve (5)

Answer 5

Trigeminal nerve (5) is a mixed nerve.
Motor- for chewing and controls middle ear muscle
Sensory - touch, pain and thermal senses of face (incl scalp and oral cavity - teeth & tongue).

Question 6

Abducens nerve (6)

Answer 6

Abducens nerve (6) s a motor nerve for movement of the eyeballs - abduction (lateral rotation).  
Abducens nerve (6) works with Oculomotor nerve (3) and
Trochlear nerve (4) to move eye.

Question 7

Facial nerve (7)

Answer 7

Facial nerve (7) is a mixed nerve that supplies all facial muscles, salivary and nasal glands, tears - and taste (anterior 2/3 of tongue).

Question 8

Vestibulocochlear nerve (8)

Answer 8

Vestibulocochlear nerve (8) is a special sensory nerve for hearing - and balance (equilibrium).

Question 9

Glossopharyngeal nerve (9)

Answer 9

Glossopharyngeal nerve (9) is a mixed nerve. Glosso = tongue, Pharynx = throat.
Sensory- taste (posterior 1/3 of tongue).
Motor- swallowing and secretion if parotid gland.

Question 10

Vagus nerve (10)

Answer 10

Vegus nerve (10) is is a mixed nerve. With wide distribution Vegus is a parasympathetic nerve.
Vegus supplies heart/lungs, liver/kidneys & digestive system:
- Receives sensations from viscera (digestive).
- Control smooth muscle of the viscera
- Controls secretion of digestive fluids and cardiac muscle
- Constriction of respiratory passageways
- Swallowing, vocalizing, coughing
- Decreases heart rate
- Monitors blood pressure and oxygen and carbon dioxide levels in the blood

Question 11

What is cranial nerve 11 and its purpose?

Answer 11

Cranial nerve 11 is the accessory nerve, a motor nerve that supplies movement to the head and pectoral girdle.

Question 12

What is cranial nerve 12 and its purpose?

Answer 12

Cranial nerve 12 is hypoglossal, a motor nerve that provides speech, swallowing and manipulation of food.

Question 13

What nerves work together to move the eye?

Answer 13

Oculomotor (3), trochlear (4) and abducens (6) work together to move the eye ball.

Question 14

What are the special sensory nerves?

Answer 14

The SPECIAL SENSORY NERVES are Olfactory (1) - smell, Optic (2) - sight & Vestibulocochlear (8) - hearing

Question 15

Which nerves have a motor function?

Answer 15

MOTOR NERVES are Oculomotor (3), Trochlear (4), Abducens (6), Accessory (11) & Hypoglossal (12) are as only contain axons of motor neurons as they leave the body.

Question 16

What are features of cranial nerves?

Answer 16

Peripheral Nervous System (PNS) - 12 pairs which pass through various foramina in the bones of the cranium and arise from the brain inside the cranial cavity. Numbers (1-12) are ordered from anterior to posterior. Anterior = closest to front of body, Posterior = furtherest away from front of body.

Question 17

Which nerves are mixed (have both sensory and motor functions)?

Answer 17

Nerves 5, 7, 9 & 10 are MIXED NERVES as they contain axons of both sensory neurons entering the brain stem, and motor neurons leaving the brain stem.

Question 18

What does O-O-O-T-T-A-F-V-G-V-A-H mean? = OH OH OH TO TOUCH AND FEEL VIRGIN GIRLS VAGINAS AND HYMENS

Answer 18

O-O-O-T-T-A-F-V-G-V-A-H = Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal

Question 19

Which cranial nerves work together to supply the sense of taste to the tongue?

Answer 19

The facial nerve (7) and the glossopharyngeal nerve (9) work together to supply sense of taste in the the tongue. Facial nerve (7) supplies the sense of taste for the anterior (back) 2/3 of tongue - and glossopharyngeal (9) supplies the sense of taste for the posterior (tip) 1/3 of tongue.