The nurse is evaluating the cranial nerves of a person with Parkinson disease who has difficulty swallowing foods. The nurse asks the patient to stick out their tongue and move it rapidly from side to side. The nurse is assessing which cranial nerve?

Hypoglossal - Cranial Nerve XII

Trigeminal - Cranial Nerve V

Facial - Cranial Nerve VII

Vestibulocochlear - Cranial Nerve VIII

Answer and Explanation

The Correct Answer is A

Choice A reason: The hypoglossal nerve is responsible for the movement of the tongue. It innervates the muscles of the tongue and allows for speech, swallowing, and chewing.

Choice B reason: The trigeminal nerve is responsible for the sensation and motor function of the face. It innervates the muscles of mastication, the skin of the face, and the mucous membranes of the mouth and nose.

Choice C reason: The facial nerve is responsible for the expression and taste of the face. It innervates the muscles of facial expression, the lacrimal and salivary glands, and the anterior two-thirds of the tongue.

Choice D reason: The vestibulocochlear nerve is responsible for the hearing and balance of the ear. It innervates the cochlea and the vestibular apparatus of the inner ear.

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Correct Answer is A

Explanation

Choice A reason: This is correct. Folic acid deficiency causes macrocytic, normochromic anemia, which means that the red blood cells are larger than normal, but have normal color and hemoglobin content. Folic acid is a vitamin that is needed for the synthesis of DNA and the maturation of red blood cells.

Choice B reason: This is incorrect. Microcytic, hypochromic anemia means that the red blood cells are smaller than normal and have less color and hemoglobin content. This type of anemia is caused by iron deficiency, not folic acid deficiency.

Choice C reason: This is incorrect. Normocytic, normochromic anemia means that the red blood cells are normal in size, color, and hemoglobin content, but there are fewer of them. This type of anemia is caused by blood loss, hemolysis, or bone marrow failure, not folic acid deficiency.

Choice D reason: This is incorrect. Microcytic, normochromic anemia means that the red blood cells are smaller than normal, but have normal color and hemoglobin content. This type of anemia is rare and is caused by disorders of red blood cell production, such as thalassemia or sideroblastic anemia, not folic acid deficiency.

A. There is total absence of dopamine at receptors in brain cells controlling motor movement, causing Parkinson symptoms to appear. B. There is an excess of dopamine production and deficiency of acetylcholine production. C. There is a decreased production of dopamine and excess of acetylcholine. D. There is a deterioration of the myelin sheath of the basal ganglia and the person has tremors.

Correct Answer is C

Explanation

Choice A reason: There is total absence of dopamine at receptors in brain cells controlling motor movement, causing Parkinson symptoms to appear, is not the correct statement. Parkinson disease is not caused by a complete lack of dopamine, but by a gradual loss of dopamine-producing neurons in the substantia nigra, a part of the brain that regulates movement. The symptoms of Parkinson disease, such as tremor, rigidity, and bradykinesia, appear when about 80% of the dopamine neurons are lost.

Choice B reason: There is an excess of dopamine production and deficiency of acetylcholine production, is not the correct statement. Parkinson disease is not caused by an excess of dopamine, but by a deficiency of dopamine. Dopamine is a neurotransmitter that helps to control movement, balance, and coordination. Acetylcholine is another neurotransmitter that works in opposition to dopamine. When dopamine is low, acetylcholine becomes dominant and causes abnormal muscle movements.

Choice C reason: There is a decreased production of dopamine and excess of acetylcholine, is the correct statement. Parkinson disease is caused by a decreased production of dopamine and excess of acetylcholine. This creates an imbalance in the neurotransmitters that regulate movement, leading to the characteristic symptoms of Parkinson disease, such as tremor, rigidity, and bradykinesia.

Choice D reason: There is a deterioration of the myelin sheath of the basal ganglia and the person has tremors, is not the correct statement. Parkinson disease is not caused by a deterioration of the myelin sheath, but by a degeneration of the dopamine neurons. Myelin is a fatty substance that covers the axons of the nerve cells and helps to transmit electrical impulses. The basal ganglia are a group of structures in the brain that are involved in movement, learning, and emotion. Tremors are one of the symptoms of Parkinson disease, but they are not the only or the most specific one.

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The nurse is evaluating the cranial nerves of a person with Parkinson disease who has difficulty swallowing foods. The nurse asks the patient to stick out their tongue and move it rapidly from side to side. The nurse is assessing which cranial nerve?

Nursing Test Bank

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Explanation

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Correct Answer is C

Explanation

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