Nokea
Excitatory signals have a ________ effect.
- A. hyperpolarizing
- B. neutral
- C. depolarizing
- D. positive
Correct Answer: C
Rationale: Excitatory signals have a depolarizing effect on the postsynaptic neuron, making the membrane potential moreOops! DeepSeek is experiencing high traffic at the moment. Please check back in a little while.
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A positive Plantar reflex in an adult is:
- A. Dorsiflexion of the big toe and fanning of all toes
- B. Plantar flexion of the big toe with a fanning of all toes
- C. The expected response in a health adult
- D. Withdrawl of the stimulated extremity from the stimulus
Correct Answer: A
Rationale: A positive Babinski sign (Plantar reflex) in adults is abnormal and indicates upper motor neuron dysfunction. It is characterized by dorsiflexion of the big toe and fanning of the other toes. In healthy adults, the normal response is plantar flexion of the toes.
Which of the following nursing interventions may reduce hemostasis and decrease the potential for thrombophlebitis for a client with neurologic disorder?
- A. Remove and reapply elastic stockings
- B. Change the client's position
- C. Keep extremities at neutral position
- D. Use a flotation mattress
Correct Answer: B
Rationale: Changing position promotes circulation and reduces clot formation.
The patient is diagnosed with Brown-Séquard syndrome after a knife wound to the spine. Which description accurately describes this syndrome?
- A. Damage to the most distal cord and nerve roots, resulting in flaccid paralysis of the lower limbs and areflexic bowel and bladder
- B. Spinal cord damage resulting in ipsilateral motor paralysis and contralateral loss of pain and sensation below the level of the lesion
- C. Rare cord damage resulting in loss of proprioception below the lesion level with retention of motor control and temperature and pain sensation
- D. Often caused by flexion injury with acute compression of cord resulting in complete motor paralysis and loss of pain and temperature sensation below the level of injury
Correct Answer: B
Rationale: Brown-Séquard syndrome involves ipsilateral motor deficits and contralateral sensory deficits.
You are caring for a patient who has just had open carpal tunnel release surgery. The surgeon has requested that the patient's hand and arm remain elevated above the level of the heart after the surgery. This is to
- A. Reduce lymphatic drainage.
- B. Reduce postoperative swelling.
- C. Restrict hand movements.
- D. Decrease possibility of nosocomial infection.
Correct Answer: B
Rationale: Elevation reduces swelling by improving venous and lymphatic return.
Which test evaluates a patient's coordination and balance?
- A. The finger-to-nose and heel-to-shin tests.
- B. The Snellen chart test for visual acuity.
- C. The Rinne and Weber tests for hearing.
- D. The Romberg test for proprioception.
Correct Answer: A
Rationale: The finger-to-nose and heel-to-shin tests assess coordination and balance. The Snellen chart tests vision, the Rinne and Weber tests assess hearing, and the Romberg test evaluates proprioception.