PMC3569902_01
Ataxic-Tremor in a Spiral Drawing.. A spiral drawn by the patient when aged 17 years, showing mild ataxic (wavy rather than saw-tooth) type action tremor.
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In particular, there was no tremor evident at rest, posture, or during intention, but mild tremor was present when trying to pick up change, open a bottle, or draw (Figure 1).
MR Brain Scan Showing a Thin Corpus Callosum.. Sagittal brain magnetic resonance imaging of the patients with an SPG11 mutation demonstrating a thin corpus callosum (arrowed), a useful clue to this diagnosis (left, sagittal T1; center, axial T2, right, coronal T1 gradient echo).
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His previous imaging studies were reviewed and the corpus callosum was noted to be abnormally thin (Figure 2).