The nurse is assessing a 12 year old with new onset of double vision. The nurse notes the child's right eye is positioned down and out. The nurse knows these findings are suggestive of damage to cranial nerve

III

Answer and Explanation

The Correct Answer is C

A. II: The optic nerve (cranial nerve II) is responsible for vision, including visual acuity and the afferent limb of the pupillary reflex. Damage to this nerve causes vision loss or visual field defects but does not affect eye movement or positioning.

B. VI: The abducens nerve (cranial nerve VI) innervates the lateral rectus muscle, which abducts the eye. Damage to this nerve results in an inability to move the eye laterally, leading to horizontal diplopia, but it does not cause a "down and out" eye position.

C. III: The oculomotor nerve (cranial nerve III) controls most of the extraocular muscles, including the superior, inferior, and medial rectus muscles, as well as the inferior oblique. It also controls the levator palpebrae superioris and the parasympathetic fibers responsible for pupillary constriction. Damage to cranial nerve III results in ptosis, a "down and out" eye position due to unopposed action of the lateral rectus (cranial nerve VI) and superior oblique (cranial nerve IV), and potentially a dilated pupil.

D. IV: The trochlear nerve (cranial nerve IV) innervates the superior oblique muscle, which depresses and internally rotates the eye. Damage to this nerve typically causes vertical diplopia and difficulty looking downward, especially when reading or descending stairs, but it does not cause a "down and out" eye position at rest.

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Correct Answer is B

Explanation

A. Palm: The palm of the hand is not ideal for palpating lymph nodes because it does not provide the fine sensitivity needed to detect subtle differences in size, texture, and tenderness.

B. Pads of fingers: The pads of the fingers are the best part of the hand to use when examining lymph nodes. This part allows for precise and gentle palpation, helping the nurse assess the size, consistency, and mobility of the lymph nodes effectively.

C. Base of hand: The base of the hand is less sensitive and not suitable for palpating lymph nodes as it provides less sensitivity compared to the pads of the fingers. The base of the hand is better suited for applying pressure during broader palpation techniques It does not provide the necessary tactile feedback for a thorough examination.

D. Ulnar surface: The ulnar surface of the hand is not typically used for palpation of lymph nodes. It is less sensitive compared to the pads of the fingers and is not appropriate for this examination.

A. VIII B. VI C. V D. VII

Correct Answer is A

Explanation

A. VIII: Cranial nerve VIII, also known as the vestibulocochlear nerve, is responsible for transmitting auditory information from the cochlea of the inner ear to the brain, allowing for the perception of sound. It also plays a role in balance by carrying information from the vestibular apparatus regarding head position and movement.

B. VI: Cranial nerve VI, the abducens nerve, controls the lateral rectus muscle, which is responsible for outward eye movement. It does not have any function related to hearing.

C. V: Cranial nerve V, the trigeminal nerve, is primarily responsible for sensation in the face and motor functions such as biting and chewing. It does not conduct nerve impulses related to hearing.

D. VII: Cranial nerve VII, the facial nerve, controls muscles of facial expression and carries taste sensations from the anterior two-thirds of the tongue. While it has some minor roles in the auditory system (such as innervating the stapedius muscle), it is not primarily responsible for conducting nerve impulses related to hearing.

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The nurse is assessing a 12 year old with new onset of double vision. The nurse notes the child's right eye is positioned down and out. The nurse knows these findings are suggestive of damage to cranial nerve

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Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

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Correct Answer is A

Explanation

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