Animal studies show that visually responsive cells in the “face” area respond;

Question

BlackTom AI · Accepted Answer

Neurons in the cortical “face” region are highly selective: they respond strongly to faces and to some other biologically relevant body parts, but they do not respond to arbitrary natural images or simple scrambled versions.

Relevant knowledge points and concepts:
- Face patches/face areas (e.g., macaque inferotemporal face patches, human fusiform face area) contain neurons with stimulus selectivity rather than general object tuning. 
- Single-unit and population recordings show elevated firing to face stimuli and often to closely related body parts (eyes, mouths, hands) but much lower responses to scrambled images or unrelated natural objects.
- Selectivity means the cells are tuned to specific high-order features present in faces and certain body parts, not to all objects.

Step-by-step reasoning:
1. Animal electrophysiology demonstrates some cells in the face patch fire vigorously to whole faces. This establishes face selectivity.
2. Experiments also present isolated face parts (eyes, mouth) and body parts (hands, torsos); many face-area cells maintain substantial responses to these parts, indicating overlap in representation.
3. When shown scrambled images (which disrupt facial/configural structure) or a wide variety of natural objects (cars, trees), these neurons typically show little or no firing, demonstrating they are not broadly tuned to all natural images.
4. Therefore the true characterization is that these neurons respond to faces and to related body parts, but not to arbitrary images or exclusively to faces.

Why the correct option is correct:
- “Only to body parts and faces” matches empirical findings that face-area neurons respond specifically to faces and to certain body parts. They are not broadly responsive to all natural images.

Why other options are incorrect:
- “More to bodies than scrambled images”: focuses on bodies versus scrambled images but misses the primary face selectivity and the fact that faces (not bodies) drive these cells.
- “To all images of natural objects”: contradicts documented selectivity.
- “Almost exclusively to faces”: ignores the documented responses to body parts.

Thus the best answer is: only to body parts and faces. This matches the provided answer.

Animal studies show that visually responsive cells in the “face” area respond;Single choice

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