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Updated: Jun 10, 2026
08:49
Visualization of Cortical Modules in Flattened Mammalian Cortices
Published on: January 22, 2018
Cortical organization in the Etruscan shrew (Suncus etruscus)
Claudia Roth-Alpermann1, Farzana Anjum, Robert Naumann
1Bernstein Center for Computational Neuroscience, Humboldt University, Berlin, Germany.
Journal of Neurophysiology
|July 30, 2010
Summary
Etruscan shrew cortex shows remarkable tactile specialization. Electrophysiological mapping revealed that most cortical responses are to touch, with distinct somatosensory areas identified.
Area of Science:
- Neuroscience
- Comparative Anatomy
Background:
- Etruscan shrews are small mammals with exceptional tactile hunting skills.
- Understanding their cortical organization offers insights into sensory processing in small mammals.
Purpose of the Study:
- To investigate the cortical organization of Etruscan shrews using electrophysiological mapping.
- To characterize auditory, visual, and somatosensory responses in the shrew cortex.
Main Methods:
- Developed a specialized anesthesia protocol for Etruscan shrews combining local anesthesia, slow general anesthesia induction, and passive cooling.
- Utilized electrophysiological mapping to record cortical responses to sensory stimuli.
Main Results:
- Large portions of the Etruscan shrew cortex responded to auditory, visual, and somatosensory stimuli.
- Approximately 75% of responsive sites were somatosensory, indicating tactile specialization.
- Identified two topographically organized somatosensory areas (putative primary and secondary somatosensory cortex) with small receptive fields.
Conclusions:
- Etruscan shrew cortex exhibits a high degree of tactile specialization.
- The findings contribute to understanding sensory processing and cortical organization in small mammals.
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