Human Anatomy & Physiology (11th Edition)
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ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Transcribed Image Text:**Sensory Homunculus**
The sensory homunculus is a diagram representing the localization of different body regions in the somatosensory cortex. In this diagram, various body parts are drawn in proportion to the area of the cortex responsible for processing their sensory information.
### Diagram Explanation:
- **Leg, Hip, Trunk:** These areas are represented at the top of the homunculus, indicating they have a substantial cortical area dedicated to them.
- **Foot, Toes, Genitals:** These parts are shown with moderate representation in the cortical space.
- **Hand, Fingers, Thumb:** These have large proportions, emphasizing their complex sensory capabilities and the fine motor skills required.
- **Face, Lips, Tongue:** The face, especially the lips and tongue, have prominent representation, reflecting their heightened sensitivity and intricate movement capabilities.
- **Eye, Nose, Teeth, Gums, Jaw, Pharynx:** These areas also have distinct representation, underscoring the intricate sensory processing required for functions like chewing, speaking, and facial sensation.
### Question:
The sensory homunculus is a representation of the localization of the different regions of the body in the somatosensory cortex. What does this indicate?
(Enter your answer in the provided space)
The purpose of the sensory homunculus is to illustrate how certain body parts have more sensory receptors, requiring a larger cortical area for processing. This visualization helps in understanding the body's sensory map in the brain.
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