What is called an olfactory hallucination?

Appeared in: NVS Staff Nurse - 2022

Explanation

A hallucination is a sensory perception experienced in the absence of an external stimulus.
The term 'olfactory' pertains to the sense of smell.
Therefore, an olfactory hallucination is correctly defined as a false perception of smell.

Why Other Options Were Wrong

Option A: A false perception of vision is known as a visual hallucination, not an olfactory one.
Option B: A false perception of sound is known as an auditory hallucination. This is the most common type of hallucination in psychiatric disorders like schizophrenia.
Option D: This option is too vague. Hallucinations are classified by the specific sensory modality they affect (e.g., sight, sound, smell). 'Things' is not a specific sensory category.

Related Visual

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and types of hallucinations as background academic context rather than a clinical decision trigger.
Olfactory hallucinations are a significant clinical finding because they often point to serious underlying neurological conditions, such as temporal lobe seizures (uncinate fits) or brain tumors, rather than being purely psychiatric.
A key nursing responsibility is to perform a detailed neurological assessment when a patient reports smelling things that aren't there. This includes asking about the character of the smell (e.g., burning, foul), frequency, and any associated symptoms like headaches, dizziness, or changes in consciousness.
What if? If a patient reports smelling burning rubber just before experiencing a period of confusion or unresponsiveness, this is a classic presentation of a temporal lobe seizure. The nurse's priority is to ensure patient safety during the event and promptly report the findings for immediate neurological evaluation.

How to Approach the Question

This is a factual recall question that tests your knowledge of medical terminology.
First, identify the key term in the question: 'olfactory'.
Recall the five senses and their associated anatomical or medical terms. The olfactory nerve is responsible for the sense of smell.
Next, understand the term 'hallucination,' which means a false sensory perception.
Combine the two parts: 'olfactory' (smell) + 'hallucination' (false perception).
Scan the options to find the one that matches 'false perception of smell'.

Concept Tested & Keywords

Concept Tested: Definition and types of hallucinations
Stem keywords: olfactory hallucination
Lead-in keywords: What is called

Question ID

Qysffoju_jAFimr1wTrLV4

Reference Book

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 3821-3823, 4719-4721, 3815-3817

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