Which newborn reflex elicits the following reaction: Head turns to one side - the way the head is facing, the arm/leg is stretched out while the other is bent?
Tonic neck reflex.
Moro reflex.
Startled reflex.
Babinski reflex.
The Correct Answer is A
Choice A reason:
The tonic neck reflex, also called the fencing posture, occurs when a baby's head is turned to one side. The arm and leg on that side stretch out, while the opposite arm and leg bend up at the elbow. This reflex lasts until the baby is about 5 to 7 months old. This reflex matches the description of the question.
Choice B reason:
The Moro reflex, also called the startle reflex, is the baby's reaction to being startled. The cause is often a loud sound, a sudden movement, or even their own cry. As an adult, you may jump or gasp when you are startled. A baby will throw back their head, extend their arms and legs, cry, then pull their arms and legs back in. This reflex does not match the description of the question.
Choice C reason:
The startled reflex is not a distinct reflex in newborns. It is another name for the Moro reflex, which is explained.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason:
Rupture of the membranes is not a reliable sign of true labor, as it can occur before or during labor, or be artificially induced by the provider. • Choice B reason:
Patterns of contractions can vary depending on the stage and phase of labor, and can also be influenced by factors such as hydration, activity, and medication. Contractions alone do not indicate true labor unless they are accompanied by cervical changes. • Choice C reason:
Changes in the cervix, such as effacement (thinning) and dilation (opening), are the most accurate indication of true labor. Cervical changes are caused by the pressure of the presenting part and the force of the contractions. The nurse should assess the cervix periodically to determine the progress of labor. • Choice D reason:
The station of the presenting part refers to the relationship of the fetal head to the maternal ischial spines, which are bony landmarks in the pelvis. The station can range from -5 (high) to +5 (low), with 0 being at the level of the ischial spines. Station does not indicate true labor, as it can vary depending on the parity, pelvic shape, and fetal position of the client.
Correct Answer is A
Explanation
Choice A reason:
The tonic neck reflex, also called the fencing posture, occurs when a baby's head is turned to one side. The arm and leg on that side stretch out, while the opposite arm and leg bend up at the elbow. This reflex lasts until the baby is about 5 to 7 months old. This reflex matches the description of the question.
Choice B reason:
The Moro reflex, also called the startle reflex, is the baby's reaction to being startled. The cause is often a loud sound, a sudden movement, or even their own cry. As an adult, you may jump or gasp when you are startled. A baby will throw back their head, extend their arms and legs, cry, then pull their arms and legs back in. This reflex does not match the description of the question.
Choice C reason:
The startled reflex is not a distinct reflex in newborns. It is another name for the Moro reflex, which is explained.
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