The nurse is performing a newborn physical assessment and is about to elicit the Moro reﬂex. Which of the following responses should the nurse expect to see?
Select one:

The cheek of the newborn is touched, and the newborn turns toward the side that was touched.

The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together.

The newborn is supine and their head is turned to one side, then the arm on that same side extends.

The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward.

Answer and Explanation

The Correct Answer is B

Choice A Reason: The cheek of the newborn is touched, and the newborn turns toward the side that was touched. This is an incorrect answer that describes a diﬀerent reﬂex called the rooting reﬂex. The rooting reﬂex is a feeding reﬂex that helps the newborn locate the nipple and initiate sucking. The rooting reﬂex is elicited by stroking the cheek or corner of the mouth of the newborn, which causes them to turn their head and open their mouth toward the stimulus.

Choice B Reason: The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together. This is because this response describes the Moro reﬂex, which is a primitive reﬂex that is present at birth and disappears by 3 to 6 months of age. The Moro reﬂex is elicited by simulating a falling sensation or a loud noise, which triggers a fear response in the newborn. The Moro reﬂex consists of four phases: extension, abduction, adduction, and crying.

Choice C Reason: The newborn is supine and their head is turned to one side, then the arm on that same side extends. This is an incorrect answer that refers to another reﬂex called the tonic neck reﬂex. The tonic neck reﬂex is a postural reﬂex that helps prepare the newborn for voluntary reaching. The tonic neck reﬂex is elicited by placing the newborn in a supine position and turning their head to one side, which causes them to assume a "fencing" posture with one arm extended and one arm ﬂexed.

Choice D Reason: The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward. This is an incorrect answer that indicates a diﬀerent reﬂex called the Babinski reﬂex. The Babinski reﬂex is a neurological reﬂex that tests for spinal cord integrity. The Babinski reﬂex is elicited by stroking the lateral aspect of the sole of the foot from heel to toe, which causes the big toe to dorsiﬂex and the other toes to fan out.

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Correct Answer is B

Explanation

Choice A Reason: Vascular spider veins. This is an incorrect answer that refers to a diﬀerent skin change that occurs during pregnancy, which aﬀects the blood vessels, not the pigment. Vascular spider veins are small red or purple clusters of blood vessels that appear on the skin, especially on the face, neck, chest, or legs. Vascular spider veins are caused by increased blood volume and hormonal changes, which dilate and rupture the capillaries. Vascular spider veins are harmless and usually disappear after delivery.

Choice B Reason: Linea nigra. This is because linea nigra is a term that refers to a darkened vertical line that appears on the abdomen during pregnancy, which runs from the umbilicus to the pubis. Linea nigra is caused by increased production of melanin, which is a pigment that gives color to the skin and hair. Linea nigra is more common and noticeable in women with darker skin tones, and it usually fades after delivery.

Choice C Reason: Melasma. This is an incorrect answer that refers to a diﬀerent skin change that occurs during pregnancy, which aﬀects the pigment, but not in a linear patern. Melasma is a term that refers to patches of brown or gray-brown discoloration that appear on the face, especially on the forehead, cheeks, nose, or upper lip. Melasma is also caused by increased production of melanin, but it is inﬂuenced by sun exposure and genetic factors. Melasma is also known as chloasma or the mask of pregnancy, and it may persist after delivery.

Choice D Reason: Striae gravidarum. This is an incorrect answer that refers to a diﬀerent skin change that occurs during pregnancy, which aﬀects the connective tissue, not the pigment. Striae gravidarum are stretch marks that appear on the skin, especially on the abdomen, breasts, hips, or thighs. Striae gravidarum are caused by rapid growth and stretching of the skin, which damage the collagen and elastin fibers. Striae gravidarum are initially red or purple, but they fade to white or silver after delivery.

A. Milia. B. Dermal melanosis. C. Stork bites. D. Birth trauma.

Correct Answer is B

Explanation

Choice A Reason: Milia. This is an incorrect answer that describes a diﬀerent skin condition. Milia are tiny white or yellow cysts that appear on the nose, chin, or cheeks of newborns. They are caused by the retention of keratin in the sebaceous glands or hair follicles. They usually disappear within a few weeks without treatment.

Choice B Reason: Dermal melanosis. This is a correct answer that explains the finding of bluish markings across the newborn's lower back. Dermal melanosis. This is because dermal melanosis, also known as Mongolian spots, is a common benign skin condition that aﬀects newborns of Asian, African, or Hispanic descent. It is characterized by bluish-gray or brown patches of pigmentation on the lower back, butocks, or extremities. It is caused by the migration of melanocytes from the neural crest to the dermis during embryonic development. It usually fades by 2 to 4 years of age.

Choice C Reason: Stork bites. This is an incorrect answer that refers to another skin condition. Stork bites, also known as salmon patches or nevus simplex, are ﬂat pink or red marks that appear on the forehead, eyelids, nose, upper lip, or nape of the neck of newborns. They are caused by dilated capillaries in the superficial dermis. They usually fade by 18 months of age.

Choice D Reason: Birth trauma. This is an incorrect answer that implies an injury or damage to the newborn's skin or tissues during labor and delivery. Birth trauma can cause bruises, abrasions, lacerations, fractures, or nerve injuries. It is not related to bluish markings on the lower back.

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The nurse is performing a newborn physical assessment and is about to elicit the Moro reﬂex. Which of the following responses should the nurse expect to see? Select one:

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Correct Answer is B

Explanation

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The nurse is performing a newborn physical assessment and is about to elicit the Moro reﬂex. Which of the following responses should the nurse expect to see?
Select one: