“…The ventricular system in our patient was normal in size. Infarction in the distrilbution of the anterior cerebral arteries could produce the frontal atrophy and kinesthetic apraxia seen in this patient,22 but it would be unusual without at least transient motor deficit [22][23]. This case illustrates that isolated frontal lobe dysfunction can produce profound psychiatric signs and symptoms, including catatonia, and that unless a careful neurological examination and the appropriate tests are performed, the diagnosis of frontal lobe disease may be missed.…”