In performing a breast examination, the nurse knows that examining the upper outer quadrant of the breast is especially important.
The reason for this is that the upper quadrant is:

Choice A rationale

The optic nerve (CN II) is responsible for vision, transmitting visual information from the retina to the brain. Dysfunction of the optic nerve would result in visual disturbances, such as loss of vision or changes in visual acuity, rather than difficulty with tongue movement. This nerve does not control motor functions of the tongue.

Choice B rationale

The abducens nerve (CN VI) controls the lateral rectus muscle of the eye, which is responsible for moving the eye outward, away from the nose. Dysfunction of the abducens nerve would result in issues with eye movement, such as double vision or inability to move the eye laterally, not tongue movement. It does not play a role in tongue motor control.

Choice C rationale

The hypoglossal nerve (CN XII) controls the muscles of the tongue, enabling movements necessary for speech, swallowing, and mastication. Dysfunction of this nerve would result in difficulty protruding the tongue and reduced strength during resistance testing. Symptoms can include atrophy of the tongue muscles, fasciculations, and deviation of the tongue to one side when extended.

Choice D rationale

The vestibulocochlear nerve (CN VIII) is responsible for hearing and balance, transmitting sound and equilibrium information from the inner ear to the brain. Dysfunction of the vestibulocochlear nerve would lead to symptoms such as hearing loss, tinnitus, or balance disorders like vertigo. It does not affect the motor control of the tongue.

Choice A rationale

Allergic conjunctivitis is usually characterized by redness, itching, and watery discharge. It is often associated with allergic reactions to pollen, dust, or pet dander. The discharge in allergic conjunctivitis is typically clear and watery, not white and thick.

Choice B rationale

Viral conjunctivitis is often caused by adenovirus and is characterized by redness, watery discharge, and a gritty sensation in the eye. It is highly contagious and can spread through contact with infected individuals. The discharge in viral conjunctivitis is usually watery, not thick and white.

Choice C rationale

Bacterial conjunctivitis is characterized by redness, itching, and white, thick discharge. It is often caused by bacteria such as Staphylococcus aureus, Streptococcus pneumoniae, or Haemophilus influenzae. The thick discharge is a hallmark of bacterial infection, distinguishing it from allergic or viral conjunctivitis.

Choice D rationale

Cataracts involve the clouding of the eye's natural lens, leading to blurred vision and difficulty seeing at night. They do not cause redness, itching, or discharge from the eye. Cataracts affect the lens inside the eye, not the conjunctival sac.