PMID: 19938677Nov 27, 2009Paper

The symptomatology of frontal and temporal lobe damages

Brain and nerve = Shinkei kenkyū no shinpo
Tomoyuki Mizuno, Katsuhiko Takeda

Abstract

In this paper, we review the symptoms associated with damages to the frontal and/or temporal lobes. Similarities and differences between the symptoms observed after a stroke and in frontotemporal lobar degeneration are also discussed. Frontal lobe damages may lead to various apraxic disorders, including limb-kinetic, ideomotor, gait, buccofacial, and ocular motor apraxia. Language dysfunction can arise from perisylvian lesions as well as from extra-perisylvian regions. Broca's aphasia, Wernicke's aphasia, pure word deafness, and aphemia are typical examples of disorders caused by damages to the perisylvian region. Transcortical motor and anomic aphasias are mostly associated with damages to the extra-perisylvian region. Although it has been reported that executive dysfunction is associated with damages to the frontal lobe, it remains to be determined whether there is a cause-and-effect relationship between the 2. A combination of memory, attention, emotional, and mood disorders may underlie executive dysfunction. Patients with lesions in the inferior temporal lobe often present with various types of agnosia. Visual agnosia is common in semantic dementia, but is infrequent after a stroke in the temporal lobe. Prosopagnosia is a ...Continue Reading

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