Which occurs when reflexes are hyperactive when the foot is abruptly dorsiflexed?
Rigidity.
Flaccidity.
Ataxia.
Clonus.
The Correct Answer is D
Choice A rationale
Rigidity is characterized by a continuous resistance to passive movement in any direction and does not specifically occur during abrupt dorsiflexion of the foot.
Choice B rationale
Flaccidity refers to decreased muscle tone or limpness, which is the opposite of hyperactivity or spasticity, and would not be observed with abrupt dorsiflexion.
Choice C rationale
Ataxia involves uncoordinated or erratic movements and is related to cerebellar dysfunction. This is not specifically triggered by abrupt dorsiflexion of the foot.
Choice D rationale
Clonus is the correct term for rhythmic, involuntary contractions of a muscle that occur when it is suddenly stretched, such as with abrupt dorsiflexion of the foot. It is a sign of hyperactive reflexes and upper motor neuron lesions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","C"]
Explanation
Choice A rationale
Bradycardia (slow heart rate) is one of the key components of Cushing's triad, which indicates increased intracranial pressure and impending herniation.
Choice B rationale
Bradypnea (slow respiratory rate) is another manifestation of Cushing's triad and reflects brainstem compression.
Choice C rationale
Hypertension (high blood pressure) is the third component of Cushing's triad, resulting from the body's attempt to maintain cerebral perfusion.
Choice D rationale
Tachycardia (rapid heart rate) is not a sign of Cushing's triad and is not associated with increased intracranial pressure.
Correct Answer is C
Explanation
Choice A rationale
A pustule is an elevated, round lesion filled with pus, not serum. Pustules are commonly seen in acne or infections.
Choice B rationale
A macule is a flat, discolored area of the skin that is not elevated. Macules do not contain fluid and are often seen in conditions like freckles or flat moles.
Choice C rationale
A vesicle is an elevated, round lesion filled with clear serum. Vesicles can result from conditions such as chickenpox, herpes simplex, or dermatitis.
Choice D rationale
A cyst is an elevated, round lesion filled with semi-solid material or fluid. Cysts are typically deeper in the skin compared to vesicles.
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