How many round swellings are present in the dorsal portion of the midbrain?
Source: https://www.lazynewton.com/questions/zoology/neural-control-and-coordination/swellings-present-dorsal-portion-midbrain-870177
Quick Answer
Option D
Four
— Concept: This question tests your knowledge of the anatomy of the human brain, specifically the structure of the…Step-by-step solution
1AnswerD·
Concept: This question tests your knowledge of the anatomy of the human brain, specifically the structure of the midbrain.
Why (D) is correct: The dorsal portion of the midbrain is characterized by four round swellings known as the corpora quadrigemina. These consist of two superior colliculi and two inferior colliculi. The superior colliculi are involved in visual reflexes, while the inferior colliculi are involved in auditory reflexes.
Why other options are wrong:
- (A) One: There is not just one swelling.
- (B) Two: While there are two superior and two inferior colliculi, the total number of distinct swellings is four.
- (C) Three: There are not three swellings.
NEET Tip: Remember that "quadri" means four, directly indicating the number of swellings in the corpora quadrigemina.
Correct Answer: (D)
Four