Which of the following is the sensory speech area?

Appeared in: DSSSB 14 August 2024

Explanation

Wernicke's area, located in the temporal lobe, is the principal region for language comprehension.
It is considered the 'sensory' speech area because it processes and interprets auditory and written language input.
Its function is to make sense of words and associate them with their meaning, which is a receptive (sensory) process.
Damage to this area leads to receptive aphasia, where the patient can hear or read but cannot understand the meaning.

Option A: The parietal area contains the primary somatosensory cortex, which processes sensory information from the body like touch, pain, and temperature, not speech comprehension.
Option C: The occipital area is the primary visual cortex, responsible for receiving and interpreting visual information from the eyes.
Option D: Broca's area is the motor speech area, responsible for the production of speech, not its comprehension. It controls the muscles used for articulation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy and function of speech centers in the brain as background academic context rather than a clinical decision trigger.
Understanding the difference between Wernicke's (receptive) and Broca's (expressive) aphasia is critical for nurses to communicate effectively with patients after a stroke or brain injury.
A nurse caring for a patient with receptive aphasia (Wernicke's) should use simple, non-verbal cues like gestures, pictures, and pointing, as spoken or written words may not be understood.
For a patient with expressive aphasia (Broca's), the nurse should be patient, allow ample time for the patient to respond, and use yes/no questions or communication boards, as their comprehension is usually intact.

How to Approach the Question

First, identify the key term in the question: 'sensory speech area'.
Understand that 'sensory' in this context refers to comprehension or reception of information, as opposed to 'motor', which refers to action or production.
Recall the major functional areas of the brain associated with speech.
Differentiate between Wernicke's area (sensory/comprehension) and Broca's area (motor/production).
Eliminate the other options: Parietal lobe (somatosensory) and Occipital lobe (vision), as their primary functions are not related to speech comprehension.
Select Wernicke's area as the correct match for 'sensory speech area'.

Concept Tested & Keywords

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E6 Psychology Morgan King 9e Part 1 p. 88-90

E6 Physiology Essentials Sembulingam 10e Part 3 p. 164-166

E6 Anatomy Applied Ashalatha 4e p. 413-415

Practise the full DSSSB 14 August 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.