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- Key concepts
Corticospinal & corticobulbar pathways > somatotopic localization in the motor cortex
Somatotopic localization in the motor cortex:
The motor supply to muscles of different parts of the body is arranged like a map over the motor cortex, with the head supply located ventro-laterally and the most inferior down the medial surface of the cortex.
In these images the parts of the motor cortex serving muscles in different parts of the body are illustrated in coronal section (left) and in lateral and medial sagittal views (right).
KEY CONCEPT:
The upper motor neurons supplying the muscles of different parts of the body are arranged like a map over the motor cortex (somatotopic localization), with the head supply located ventro-laterally, and the most inferior regions of the body represented down the medial surface of the cortex.
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