S1_L3: Cranial Nerves and Face Flashcards
Determine which statement is INCORRECT:
A. Cranial nerves exit brain through foramina in skull
B. CN I & II attach to the Forebrain
C. III-XII attach to the Brainstem
D. Only CN X and XI goes beyond the head-neck
E. Cranial nerves are numbered from anterior to posterior
D. Only CN X and XI goes beyond the head-neck
NOTE: Only the Vagus nerve (CN X) does so.
Determine which nerves are sensory, motor, or both.
- CN III
- CN IX
- CN X
- CN II
5.CN XII
A. Sensory
B. Motor
C. Both
- B
- C
- C
- A
- B
Determine which nerves are sensory, motor, or both.
- CN II
- CN V
- CN VII
- CN XI
- CN IV
A. Sensory
B. Motor
C. Both
- A
- C
- C
- B
- B
How many branches do CN V have? Name all of its branches.
3 branches (Ophthalmic, Maxillary, Mandibular)
This is a rare condition in which cleft lip on one side extends to medial margin of orbit due to failure of maxillary process to fuse with the lateral and medial nasal processes
Oblique facial cleft
This is known as the sphincter of the mouth
Orbicularis oris
Determine if the following descriptions or s/sx pertains to bell’s palsy or stroke.
- CNS lesion
- Peripheral lesion
- upper portion is intact
- whole side of the face is affected
- solely affects the facial nerve
A. Bell’s Palsy
B. Stroke
- B
- A
- B
- A
- A
What is CN III?
Oculomotor Nerve
What is CN V?
Trigeminal Nerve
What is CN VII?
Facial Nerve
The following statements are true, EXCEPT:
A. The function of CN I is for smell
B. To test the CN II, a practitioner may utilize a Snellen chart
C. Horner syndrome arises from lesions in CN III
D. CN IV innervated superior oblique muscle
E. CN V is the largest cranial nerve
C. Horner syndrome arises from lesions in CN III
NOTE: Only Ptosis and Diplopia results.
Match the following nerve to its corresponding exit in the skull.
- CN III
- CN IV
- CN XI
- abducent neve
- facial nerve
A. superior orbital fissure
B. jugular foramen
C. internal acoustic meatus
D. hypoglossal canal
E. None
- A
- A
- B
- A
- C
Match the following nerve to its corresponding exit in the skull.
- CN V-3
- CN V-2
- CN8
- CN XII
- CN VII
A. foramen rotundum
B. foramen ovale
C. foremen spinosum
D. stylomastoid foramen
E. None
- B
- A
- E
- E
- D
TRUE OR FALSE: When a lesion occurs in CN II, blindness results.
True
This is as the most slender cranial nerve
CN IV or Trochlear nerve
This nerve supplies the muscles of mastication
CN V-3 or Mandibular branch of Trigeminal nerve
Match the following descriptions to its corresponding cranial nerve.
- Sense of pain, pressure, temperature
- Taste from anterior 2/3 of tongue
- Pain felt when tongue is accidentally bitten
- Enters the internal acoustic meatus, passes through the facial canal, and exit to the stylomastoid foramen
- Ipsilateral weakness arises from lesion
A. Trigeminal Nerve
B. Facial Nerve
- A
- B
- A
- B
- B
Match the following descriptions to its corresponding cranial nerve.
- Constrictor muscle of pharynx
- Controls muscle of tongue
- Controls stylopharyngeus muscle
- Controls balance
- Called the “wandering” nerve
A. Auditory/ Vestibulocochlear Nerve
B. Glossopharyngeal Nerve
C. Vagus Nerve
D. Accessory Nerve
E. Hypoglossal Nerve
- C
- E
- B
- A
- C
Match the following descriptions to its corresponding cranial nerve.
- Responsible for the bitter taste
- Controls position and movement of head
- Innervates SCM and Trapezius muscle
- Innervates pharyngeal muscle for gag reflex
- Lesion in this will have the tongue pointing towards side of lesion
A. Auditory/ Vestibulocochlear Nerve
B. Glossopharyngeal Nerve
C. Vagus Nerve
D. Accessory Nerve
E. Hypoglossal Nerve
- B
- A
- D
- C
- E
What muscle does the abducent muscle innervate?
Lateral rectus muscle (LR6)
TRUE OR FALSE: The facial nerve is the longest intracranial nerve.
False.
It is the abducent nerve (CN VI)
Enumerate the 3 processes for the development of the face.
- Frontonasal processes
- Maxillary processes
- Mandibular processes
Match the following description to its corresponding facial processes.
- Forms the philtrum of upper lip
- Develops as mesodermal proliferation
- Forms the forehead
- Becomes the upper jaw, cheek and bury the premaxilla and fuse in the midline
- It grows medially below stomodeum and fuse in midline to form entire lower lip
A. Frontonasal processes
B. Maxillary processes
C. Mandibular processes
- A
- B
- A
- B
- C
This condition of the face is caused by failure of maxillary process to fuse in medial nasal process
Cleft upper lip
Match the following branch of trigeminal nerve to its corresponding description.
- supplies the upper eyelid, cornea, and conjunctiva
- supplies the TMJ, part of auricle, and mucous membrane of
mouth - has the auriculotemporal nerve as its branch
- has the infraorbital nerve as its branch
- has the infratrochlear nerve as its branch
A. Ophthalmic branch
B. Maxillary branch
C. Mandibular branch
- A
- C
- C
- B
- A
What are the 4 muscles that are innervated by CN V-3?
- Masseter
- Temporalis
- Lateral pterygoids
- Medial pterygoids
What kind of joint is the TMJ?
Modified hinge / condyloid joint
The nerve to stapedius arises from what nerve?
Facial Nerve
What is the cranial nerve number of the Glossopharyngeal nerve?
CN IX
What is the cranial nerve number of the Accessory nerve?
CN XI
What is the cranial nerve number of the Optic nerve?
CN II
What is the smallest muscle of the body
stapedius muscle in middle ear
Match the following facial nerve branch to its corresponding descriptions.
- supplies anterior and superior auricular muscles, frontal belly of occipito frontalis muscles, orbicularis oculi and corrugator supercilii
- emerges from the anterior border of gland below the parotid duct
- cross lower margin of body of mandible to supply depressor anguli oris muscle
- passes forward in the neck below mandible to supply the platysma muscle
- supplies anterior border of gland and supplies orbicularis oculi
A. Temporal branch
B. Zygomatic branch
C. Buccal branch
D. Mandibular branch
E. Cervical branch
- A
- C
- E
- E
- B
The following statements are true, EXCEPT:
A. Occipitofrontalis muscle gives the face a surprise look
B. Corrugator supercilii produces horizontal wrinkles of forehead as in frowning
C. Procerus scrunches the nose
D. Orbicularis oris compresses the lips together as in whistling
or kissing
E. None
B. Corrugator supercilii produces horizontal wrinkles of forehead as in frowning
NOTE: it produces vertical wrinkles
The following statements are true, EXCEPT:
A. Mentalis allows the pouting of the lower lip
B. Mentalis raises skin of chin during the expression of
doubt
C. Buccinator press cheeks against the molar teeth during chewing
D. Buccinator compresses cheeks during kissing
E. None
D. Buccinator compresses cheeks during kissing
NOTE: It compressed during blowing
The following statements are true, EXCEPT:
A. Platysma drags jaw down
B. Risorius draws corner of mouth laterally when
grinning
C. Styloglossus draw tongue up and back
D. Geniohyoid depresses mandible
E. Mylohyoid depresses mandible
E. Mylohyoid depresses mandible
NOTE: Mylohyoid elevates floor of mouth and hyoid
bone during first stage of swallowing
The following muscles are paired with its correct action, EXCEPT:
A. Zygomaticus major - draws angle of mouth superolaterally as in
smiling or laughing
B. Platysma - draws mouth down as in pouting
C. Levator anguli oris - elevates corner of mouth
D. Mentalis - depresses skin of chin during the expression of
doubt
E. None
D. Mentalis - depresses skin of chin during the expression of
doubt
NOTE: It raises skin of chin during the expression of
doubt
This part of the orbicularis oculi aids in eye blinking
Palpebral part of orbicularis oculi
This part of the orbicularis oculi closes lids as in squinting to
protect from glare or dust
Orbital part of orbicularis oculi
This is a sensory disorder of the sensory root of CN V characterized by sudden attacks of excruciating, lightening like jabs of facial pain;
Trigeminal neuralgia (tic douloreux)
This is an infection caused by a virus that produces lesion in the spinal or cranial ganglia. This is characterized by eruption of group of vesicles and may involve any branch but the ophthalmic division of the trigeminal n. Usually, the cornea is involved causing painful ulcerations
Herpes zoster (shingles)
Determine if the following are s/sx or facts about Bell’s Palsy.
- lose sense of taste on the side of the tongue
- sound heard is very soft
- the higher the lesion, the longer the recovery
- the nearer the lesion to the exit, the faster the recovery
- when lesion is found before it exits at the stylomastoid foramen, all the 5 branches of facial nerve will be affected
A. Yes
B. No
- A
- B
- A
- A
- A
The Parotid region is innervated by _______ nerve
glossopharyngeal
This is also known as Stensen’s duct
Parotid duct
The (1)______ is the largest salivary gland, while the (2)______ is the second largest salivary gland.
- Parotid gland
- Submandibular gland
