30 Questions
What is the primary function of the olfactory nerve (CN I)?
Detection of smell
A patient with a lesion in the olfactory nerve (CN I) is likely to experience which of the following symptoms?
Anosmia
During the examination of the olfactory nerve, which of the following substances should be avoided?
Alcohol
What is the term for distorted odor perception?
Parosmia
What is the purpose of blocking one nostril during the examination of the olfactory nerve?
To compare the sense of smell on both sides
A patient with a phantosmia is experiencing which of the following symptoms?
An olfactory hallucination
What type of sensory nerve is responsible for transmitting visual information from the eye to the brain?
Special sensory nerve
What is the result of a lesion in the optic nerve that affects the outer half of both the right and left visual fields?
Bitemporal hemianopia
Which of the following cranial nerves is responsible for the pupillary light reaction?
Both II and III
A patient with a lesion in the oculomotor nerve may exhibit which of the following symptoms?
Ptosis and down and out positioning of the affected eye
What is the function of the trochlear nerve?
Eye movement
A patient with a lesion in the trigeminal nerve may exhibit which of the following symptoms?
Loss of facial sensation
What is the purpose of the confrontation test during an optic nerve examination?
To assess visual fields
Which of the following nerves is responsible for supplying the lateral rectus muscle?
Abducens nerve (VI)
What is the primary function of the motor part of the facial nerve?
To supply muscles of the face, posterior belly of digastric, stylohyoid, and stapedius
What is the purpose of the corneal reflex in trigeminal nerve examination?
To detect damage to the ophthalmic nerve or facial nerve
What is the characteristic of the jaw reflex in individuals with upper motor neuron lesions?
It is quite pronounced
How can you clinically differentiate between UMN and LMN facial paralysis?
By asking the patient to close their eyes and observe the affected side
What is the type of the vestibulocochlear nerve?
Purely sensory nerve
What is the afferent limb involved in the corneal reflex?
Ophthalmic nerve
What is the purpose of placing the fingers of the examining hand beneath the chin and asking the patient to open their mouth and resist closure?
To assess the motor strength of the masseter muscle
What is the characteristic of the jaw reflex in normal individuals?
It is absent or very slight
Which type of fibers are associated with the motor function of the Vagus nerve in relation to the heart?
Parasympathetic fibers
Which muscles are innervated by the spinal part of the Accessory nerve?
Sternomastoid and trapezius muscles
Which condition is most likely to result from a lesion of the Vestibular part of the nerve?
Vertigo
Which examination is most relevant for assessing the function of the Cochlear part of the nerve?
Rinne Test
What is a primary role of the motor fibers of the Glossopharyngeal nerve?
To play a role in swallowing and speech
Which of the following symptoms might indicate a lesion in the Hypoglossal nerve?
Tongue weakness
What does diminished gag reflex primarily indicate in relation to nerve damage?
Damage to the Vagus and/or Glossopharyngeal nerve
Which of the following functions is NOT associated with the Vagus nerve?
Motor control of the extrinsic muscles of the tongue
This quiz covers the 12 cranial nerves, their functions, and the effects of lesions. Topics include the olfactory nerve, optic nerve, oculomotor nerve, and more.
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