Related Experiment Video
Updated: Jun 18, 2026
![Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58641.jpg&w=3840&q=50)
Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury
Published on: November 9, 2018
[Incomplete Gerstmann syndrome with a cerebral infarct in the left middle frontal gyrus]
Yoshihito Ando1, Mikio Sawada, Mitsuya Morita
1Division of Neurology, Department of Medicine, Jichi Medical University.
Abstract:
A 65-year-old right-handed man noted a sudden onset of numbness and weakness of the right hand. On the initial visit to our hospital, he showed severe acalculia, and transient agraphia (so called incomplete Gerstmann syndrome) and transcortical sensory aphasia. Brain MRI revealed a fresh infarct in the left middle frontal gyrus. The paragraphia and aphasia improved within 14 days after onset, but the acalculia persisted even at seven months after onset In an 123I-IMP SPECT study, the cerebral blood flow (CBF) was found to be decreased in the infarction lesion and its adjacent wide area, the ipsilateral angular and supramarginal gyri, and contralateral cerebellar hemisphere. We speculate that inactivation in the infarction lesion caused the CBF decrease in the non-infarcted areas due to diaschisis. This case indicates that Gerstmann syndrome can be caused by not only dysfunction of the angular gyrus but also of the left middle frontal gyrus in the dominant hemisphere.
Related Concept Videos
Role of Cerebellum and Prefrontal Cortex in Memory
Visual Agnosia
Transient Ischemic Attack l: Introduction
Hemorrhagic Stroke ll: Pathophysiology
Higher Mental Functions of the Brain: Language
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Hemorrhagic Stroke l: Introduction

