Which cranial nerves are involved in eye movements? Select all that apply.

Trochlear

Optic

Oculomotor

Abducens

Facial

Answer and Explanation

Correct Answer : A,C,D

A) Trochlear: The trochlear nerve (CN IV) is responsible for innervating the superior oblique muscle, which helps control the downward and inward movement of the eye.
B) Optic: The optic nerve (CN II) is primarily involved in vision and visual acuity, not in the movement of the eye. It transmits visual information from the retina to the brain.
C) Oculomotor: The oculomotor nerve (CN III) controls most of the extraocular muscles, including those responsible for eye movement (superior rectus, inferior rectus, medial rectus, and inferior oblique) and also controls pupil constriction.
D) Abducens: The abducens nerve (CN VI) controls the lateral rectus muscle, which is responsible for the outward movement of the eye.
E) Facial: The facial nerve (CN VII) controls the muscles of facial expression and is not involved in eye movements.

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Correct Answer is C

Explanation

A. Stiffening of the large arteries: Stiffening of the large arteries is a common age-related change and can contribute to increased systolic blood pressure. While this change can affect cardiovascular function, it does not directly increase the risk of falls as much as other factors.
B. Rise in the systolic blood pressure: An increase in systolic blood pressure often occurs with aging due to arterial stiffening. Elevated systolic blood pressure alone does not directly cause an increased risk of falls but is a part of the broader spectrum of cardiovascular changes.
C. Postural orthostatic hypotension: Postural orthostatic hypotension (OH) is characterized by a significant drop in blood pressure when a person stands up from a sitting or lying position, leading to dizziness or lightheadedness. This condition is common in older adults and significantly increases the risk of falls, as it can cause sudden dizziness and unsteadiness upon standing.
D. Decline of pacemaker cells in the sino-atrial node: The decline of pacemaker cells in the sinoatrial node can lead to bradycardia or irregular heart rhythms, which are related to cardiac function. While this can affect overall cardiovascular health, it does not directly contribute to the risk of falls as much as the sudden changes in blood pressure associated with postural orthostatic hypotension.

A. Lordosis B. Kyphosis C. Keratosis D. Scoliosis

Correct Answer is A

Explanation

A) Lordosis: Lordosis refers to an increased inward curvature of the lumbar spine. During pregnancy, this curvature often increases to help compensate for the growing uterus and shift the center of gravity. This adjustment helps maintain balance and alignment but can lead to noticeable changes in posture.
B) Kyphosis: Kyphosis is characterized by an exaggerated outward curvature of the thoracic spine, resulting in a hunchback appearance. It is not related to the increased lumbar curvature seen during pregnancy.
C) Keratosis: Keratosis refers to a condition involving thickening or hardening of the skin, such as actinic keratosis. It is unrelated to spinal curvature or changes associated with pregnancy.
D) Scoliosis: Scoliosis is a condition marked by an abnormal lateral curvature of the spine. It does not specifically relate to the increased lumbar curvature that occurs during pregnancy due to the enlarging uterus.

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Which cranial nerves are involved in eye movements? Select all that apply.

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

When assessing an older adult client, the nurse notes which age-related changes of the cardiovascular system that increase the risk for falls?

Correct Answer is C

Explanation

Increased lumbar curvature, which compensates for the enlarging uterus in pregnant women, is called what?

Correct Answer is A

Explanation

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