J Clin Neurol.  2006 Jun;2(2):146-148. 10.3988/jcn.2006.2.2.146.

Isolated Weakness of Middle, Ring, and Little Fingers due to a Small Cortical Infarction in the Medial Precentral Gyrus

• Han YS
• Ha SW
• Cho JS
• Park SE
• Kim JM
• Han JH
• Cho EK
• Kim DE

• KMID: 1700749
• DOI: http://doi.org/10.3988/jcn.2006.2.2.146

Abstract

Small cortical strokes can produce predominant isolated weakness in a particular group of fingers: radial or ulnar. The traditional views are of point-to-point representations of each finger to neurons located in the precentral gyrus of the motor cortex such that the neurons of the radial fingers are located laterally and those of the ulnar fingers are located medially. We present a case of isolated weakness of middle, ring, and little fingers due to a small cortical infarction in the medial precentral gyrus.

Keyword

Cortical infarction; Precentral gyrus; Finger weakness

MeSH Terms

Fingers*
Infarction*
Motor Cortex
Neurons
Stroke

Figure

• 

  Figure 1 Brain MRI of the patient. (A) Diffusion-weighted image shows an infarct in the medial precentral gyrus. Distances from the falx to the center of the lesion (a) and to the lateral surface of brain (b) are indicated. (B) The lesion (arrow) is located medially in the precentral hand knob in T2 axial view. In coronal (C) and sagittal (D) views the lesion (arrows) shows high signal intensity at the left precentral gyrus.

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