The simple idea
The primary motor cortex sends commands through the corona radiata and internal capsule. In the capsule, fibres are packed tightly, so a small lesion can cause dense weakness of the opposite face, arm and leg.
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Part 5 · The Nervous System II — Spine, Movement, Memory and Stroke
Same concept, other depth: Clinical Reasoning →
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The primary motor cortex sends commands through the corona radiata and internal capsule. In the capsule, fibres are packed tightly, so a small lesion can cause dense weakness of the opposite face, arm and leg.
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