Alternative Figure 6.7: Somatotopic Organization of Medial and Lateral Motor System Projections to Anterior Horn Cells

An illustration depicts the lateral and medial motor systems projecting to the anterior horn cell. Lateral motor systems project to anterior horn cells for distal muscles, while medial motor systems project to the anterior horn cells for proximal muscles.
FIGURE 6.7 Somatotopic Organization of Medial and Lateral Motor System Projections to Anterior Horn Cells Lateral motor systems (corticospinal and rubrospinal tracts) project to lateral anterior horn cells, while medial motor systems (anterior corticospinal, vestibulospinal, reticulospinal, and tectospinal tracts) project to medial anterior horn cells. Lateral anterior horn cells control distal muscles of the extremities, while medial anterior horn cells control proximal trunk muscles. (Spinal cord section from S. J. DeArmond et al. 1989. Structure of the Human Brain: A Photographic Atlas, 3rd ed. Oxford University Press: New York.)

 

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