PGIMER NO - 2020
Applied Anatomy
Easy
Connection between right and left hemisphere is known as?
Appeared in: PGIMER NO - 2020
Explanation
- The corpus callosum is the largest collection of white matter tissue (commissural fibers) in the brain.
- Its primary function is to interconnect the two cerebral hemispheres, allowing them to communicate and process information together.
- This structure is crucial for integrating motor, sensory, and cognitive performances between the left and right sides of the brain.
Why Other Options Were Wrong
- Option B: The pons is part of the brainstem and serves as a message station between different parts of the brain, such as the cerebrum and cerebellum, but it does not connect the two cerebral hemispheres.
- Option C: The cerebellum is responsible for coordinating voluntary movements, balance, and posture. It is a distinct structure from the cerebrum and does not connect the cerebral hemispheres.
- Option D: Gyri are the anatomical folds or ridges on the surface of the cerebral cortex. They increase the brain's surface area but are not a connecting structure.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the brain: Interhemispheric connections as background academic context rather than a clinical decision trigger.
- Understanding the function of the corpus callosum is vital in neurology. Damage to this structure, from stroke or trauma, can lead to 'split-brain syndrome,' where the hemispheres cannot communicate effectively, causing unique neurological deficits.
- Agenesis of the corpus callosum is a congenital disorder where the structure is partially or completely absent, leading to a range of developmental challenges that nurses may encounter in pediatric or developmental care settings.
- What if the question asked about the connection between the two temporal lobes specifically? While the corpus callosum connects large parts of the hemispheres, the anterior commissure also plays a key role in interconnecting the temporal lobes.
How to Approach the Question
- Identify the core of the question: it's asking for the specific anatomical name of the structure that connects the two halves (hemispheres) of the cerebrum.
- This is a direct factual recall question from neuroanatomy.
- Review the options provided.
- Recall the function of each listed brain part: Corpus callosum (connects hemispheres), Pons (brainstem relay), Cerebellum (coordination/balance), Gyri (cortical folds).
- Match the function described in the question ('connection between right and left hemisphere') with the correct anatomical structure.
Concept Tested & Keywords
- Concept Tested: Anatomy of the brain: Interhemispheric connections
- Stem keywords: connection, right hemisphere, left hemisphere
- Lead-in keywords: known as
Question ID
QM5XXKDpKbQJkcYPSk4996
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. 201-203, 202-204
E6 Anatomy Grays 43e Vol 1 Part 2 p. 82-84
Practise the full PGIMER NO - 2020
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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