A patient is able to recognise a person by name but not face. The lesion, in this case, is in
## Core Concept
The question tests knowledge of **prosopagnosia**, a condition where an individual is unable to recognize faces, despite being able to recognize people by their voice or name. This condition is often associated with damage to specific areas of the brain involved in face recognition.
## Why the Correct Answer is Right
The correct answer, **Fusiform gyrus**, is right because the fusiform gyrus, particularly the fusiform face area (FFA), is a region in the temporal lobe that is crucial for face recognition. Damage to this area can lead to prosopagnosia, where individuals can recognize people by their name or voice but not by their face. The FFA is specialized for processing faces and is a key component of the ventral pathway of visual processing.
## Why Each Wrong Option is Incorrect
* **Option A:** The **primary visual cortex (V1)** is the initial point of processing for visual information in the occipital lobe. While damage to V1 can lead to blindness or severe visual impairments, it does not specifically affect face recognition.
* **Option B:** The **hippocampus** plays a critical role in memory formation, particularly in converting short-term memories to long-term ones. Although it's involved in aspects of memory, it's not directly associated with face recognition.
* **Option D:** The **cerebellum** is primarily involved in coordinating voluntary movements such as posture, balance, coordination, and speech, resulting predominantly from the growth of the neocerebellum. It is not directly involved in face recognition.
## Clinical Pearl / High-Yield Fact
A key point to remember is that **prosopagnosia** can result from bilateral damage to the fusiform gyri or the connections between the fusiform gyrus and other parts of the brain. This condition highlights the complex and somewhat lateralized nature of face recognition in the human brain.
## Correct Answer: C. Fusiform gyrus.