Nokea
The cutaneous innervation of the ear
- A. Is the lesser auricular nerve
- B. Involves the dermatome of C3
- C. Includes the zygomaticotemporal branch of the trigeminal nerve
- D. Includes the vagus
Correct Answer: D
Rationale: The vagus nerve (X) provides sensory innervation to the external auditory meatus and part of the ear. This is important in diagnosing referred pain from the ear.
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A client with multiple sclerosis is observed transferring from the bed to a motorized wheelchair and applying splints to the lower extremities before entering the bathroom to perform morning self-care. What could the nurse conclude regarding this observation?
- A. The client uses assistive devices to optimize autonomy.
- B. The client needs instruction to conduct morning care before applying splints to lower extremities.
- C. The client is dependent upon assistive devices.
- D. The client is reliant upon assistive devices for independent.
Correct Answer: A
Rationale: The client's use of assistive devices demonstrates their ability to maintain independence and adapt to their physical limitations.
When an edrophonium (Tensilon) test is carried out, which of the following drugs must be available as an antidote?
- A. Atropine sulfate
- B. Diazepam (Valium)
- C. Ephedrine
- D. Corticosteroids
Correct Answer: A
Rationale: Atropine sulfate is used as an antidote for cholinergic crisis.
All of the following are branches of the ophthalmic division of the trigeminal nerve EXCEPT:
- A. Lacrimal nerve
- B. Infraorbital nerve
- C. Supraorbital nerve
- D. Infratrochlear nerve
Correct Answer: B
Rationale: The infraorbital nerve is a branch of the maxillary division (V2) of the trigeminal nerve, not the ophthalmic division (V1). It supplies sensation to the lower eyelid, cheek, and upper lip.
The ability to respond to a stimulus is termed:
- A. polarized
- B. irritability
- C. depolarized
- D. conductivity
Correct Answer: B
Rationale: Irritability is the ability of a neuron or cell to respond to a stimulus. Polarization and depolarization refer to the electrical state of the membrane, conductivity refers to the ability to transmit signals, and all-or-none response refers to the nature of action potentials. Therefore, B is the correct answer.
Loss of muscle coordination results from damage to the:
- A. cerebrum
- B. hypothalamus
- C. cerebellum
- D. thalamus
Correct Answer: C
Rationale: The cerebellum is responsible for coordinating voluntary movements and maintaining balance. Damage to the cerebellum results in loss of muscle coordination. The cerebrum, hypothalamus, thalamus, and midbrain have different functions. Thus, C is the correct answer.