case_images: PMC10568456_01
case_images: Brain magnetic resonance imaging before surgery. Gadolinium-enhanced T1-weighted sagittal (A), coronal (B), and axial (C) images show a right frontal lesion with enhancement. (D,E) Diffusion tensor image showing the corticospinal tract. (F) Postoperative fluid-attenuated inversion recovery axial image, showing small resected area with low-intensity rim surrounded by high-intensity white matter lesion.
case_images: fnins-17-1217430-g001.jpg
case_images: PMC10568456_01_fnins-17-1217430-g001.jpg
case_images: F1
case_images: An 80-year-old right-handed man underwent subtotal resection of a tumor in the right superior frontal gyrus (Figures 1A-C). Diffusion tensor imaging showed that corticospinal tract was intact (Figures 1D, E). Thus, the primary sensorimotor cortex was preserved (Figure 1F).
case_images: Impairment of in-phase movement. Despite an instruction for simultaneous movement, the patient extended his fingers alternatingly. (A) Fists. Right-to-left extension of panels (B,C) small fingers, (D,E) ring fingers, (F,G) tall fingers, (H) index fingers, and (I,J) thumbs. See Supplementary Video 6.
case_images: fnins-17-1217430-g002.jpg
case_images: PMC10568456_01_fnins-17-1217430-g002.jpg
case_images: F2
case_images: When an instruction on in-phase sequential finger movement was given by verbal commands with gestures to bend his fingers from the thumb in order and open his fingers bilaterally at the same time, a whole series of movements at once, he bent and extended his fingers, one at a time, alternating bilaterally with a chant to keep time (Figure 2 and Supplementary Video 6).