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.
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In counseling patients with spinal cord lesions regarding sexual function, how should the nurse advise a male patient with a complete lower motor neuron lesion?
- A. He is most likely to have reflexogenic erections and may experience orgasm if ejaculation occurs
- B. He may have uncontrolled reflex erections but orgasm and ejaculation are usually not possible
- C. He has a lesion with the greatest possibility of successful psychogenic erection with ejaculation and orgasm
- D. He will probably be unable to have either psychogenic or reflexogenic erections and no ejaculation or orgasm
Correct Answer: B
Rationale: Lower motor neuron lesions result in uncontrolled reflex erections.
A college student observes a roommate going out wearing uncharacteristically seductive clothing, returning 12 to 24 hours later, and then sleeping for 8 to 12 hours. At other times, the roommate sits on the floor speaking like a young child. Which health problem should be considered?
- A. Functional neurological (conversion) disorder
- B. Dissociative identity disorder
- C. Dissociative amnesia
- D. Body dysmorphic disorder
Correct Answer: B
Rationale: The correct answer is B: Dissociative identity disorder. The roommate displaying different behaviors indicates potential dissociation, where different identities or states of consciousness take control. Seductive clothing and extended absence may indicate a different identity, while childlike speech may suggest another identity. This pattern aligns with the criteria for dissociative identity disorder. Functional neurological disorder (Choice A) involves physical symptoms without a clear organic cause. Dissociative amnesia (Choice C) pertains to memory loss due to psychological trauma. Body dysmorphic disorder (Choice D) involves obsession with perceived flaws in physical appearance. These options do not align with the diverse behaviors and identity shifts observed in the roommate.
Which of these diseases can be prevented with a vaccine for humans?
- A. eastern equine encephalitis
- B. western equine encephalitis
- C. West Nile encephalitis
- D. Japanese encephalitis
Correct Answer: D
Rationale: Step 1: Identify the disease - Japanese encephalitis is caused by a virus transmitted by mosquitoes.
Step 2: Understand the role of a vaccine - a vaccine stimulates the immune system to produce antibodies to fight the virus.
Step 3: Vaccines prevent future infections - by administering a vaccine for Japanese encephalitis, individuals can develop immunity and prevent the disease.
Step 4: Therefore, the correct answer is D because a vaccine is available to prevent Japanese encephalitis.
Summary: A, B, and C are incorrect because there are no vaccines available for eastern equine encephalitis, western equine encephalitis, and West Nile encephalitis, respectively.
Which functional cell of the nervous system is responsible for transmission of information from one cell to another?
- A. nerves
- B. neurons
- C. ganglions
- D. glial cells
Correct Answer: B
Rationale: Neurons are specialized cells that transmit electrical and chemical signals throughout the nervous system. They are the primary functional units of the nervous system, responsible for processing and transmitting information to other neurons, muscles, or glands.
Which of the following findings would indicate a change in a patient's mental status?
- A. Sudden onset of confusion or disorientation.
- B. Steady gait and normal speech.
- C. Clear and coherent communication.
- D. Stable vital signs and regular breathing.
Correct Answer: A
Rationale: A sudden onset of confusion or disorientation is a key indicator of a change in mental status. Steady gait, clear communication, and stable vital signs are normal findings.
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