Related Experiment Video
Updated: May 3, 2026

Behavioral Assessment of Manual Dexterity in Non-Human Primates
Published on: November 11, 2011
Impairment of semantic memory after basal forebrain and fornix lesion
Marco Solcà1, Marie Di Pietro, Armin Schnider
1a Division of Neurorehabilitation, Department of Clinical Neurosciences , University Hospital and University of Geneva , CH-1211 Geneva 14 , Switzerland.
Abstract:
Semantic memory impairment is classically associated with lesion of the anterior temporal lobe. We report the case of a patient with severe semantic knowledge impairment and anterograde amnesia after bilateral ischemic lesion of the fornix and of the basal forebrain following surgical clipping of an aneurysm of the anterior communicating artery. Fluorodeoxyglucose positron emission tomography (FDG-PET) showed a temporal hypometabolism. Severe semantic impairment is a rare complication after rupture of an anterior communicating artery aneurysm and may result from disconnection of the temporal lobe.
More Related Videos
Related Concept Videos
Role of Cerebellum and Prefrontal Cortex in Memory
Role of Hippocampus in Memory
Higher Mental Functions of Brain: Learning and Memory
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...
Amnesia
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
Dementia l: Introduction

