The largest part of the human brain is?

Appeared in: UPRVUNL - 2021

Explanation

The cerebrum is the largest and most developed part of the human brain, making up about two-thirds of the brain's total mass.
It is divided into two cerebral hemispheres (left and right) and is the center for higher-order functions such as thought, language, memory, and voluntary movement.
The outer surface of the cerebrum, the cerebral cortex, is highly convoluted with ridges (gyri) and grooves (sulci) to maximize its surface area for processing information.

Option A: The medulla oblongata is a small, cone-shaped part of the brainstem, connecting the brain to the spinal cord. It is significantly smaller than the cerebrum.
Option B: The midbrain is the shortest segment of the brainstem and is a relatively small structure located between the forebrain and hindbrain.
Option C: The cerebellum, often called the 'little brain', is the second-largest part of the brain but is considerably smaller than the cerebrum. Its weight is about 10% of the cerebrum's.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy and major components of the human brain as background academic context rather than a clinical decision trigger.
Understanding the functions of different brain parts is crucial for nurses to assess neurological deficits. For example, a patient with a stroke affecting the cerebrum's motor cortex might show weakness on one side of the body (hemiparesis).
Damage to the cerebellum (e.g., from a tumor or stroke) would lead to problems with coordination and balance (ataxia), not memory loss, which is a key differentiator in neurological assessment.
What if? If a patient suddenly stops breathing and has an irregular heartbeat, the nurse should suspect a problem with the brainstem, specifically the medulla oblongata, which houses the vital respiratory and cardiovascular centers. This is a medical emergency requiring immediate intervention.

How to Approach the Question

Identify the core question: The question asks to identify the 'largest part' of the human brain.
This is a factual recall question based on fundamental human anatomy.
Mentally visualize or recall the major structures of the brain: the large, wrinkled cerebrum on top, the smaller cerebellum at the back, and the brainstem connecting to the spinal cord.
Compare the options based on physical size. The cerebrum is visibly the largest structure, covering most of the other brain parts.
Eliminate the other options: The medulla oblongata and midbrain are small components of the brainstem. The cerebellum is the second-largest but is significantly smaller than the cerebrum.

Concept Tested & Keywords

QwviIooS1tAfpUCeNPOw2f

E6 Anatomy Grays 43e Vol 1 Part 3 p. 105-106

E6 Psychology Baron Misra 5e Part 1 p. 76-77

E6 Anatomy Applied Ashalatha 4e p. 419-421

Practise the full UPRVUNL - 2021

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