Association fiber pathways to the frontal cortex from the superior temporal region in the rhesus monkey

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · J. Comp. Neurol.; (United States)

DOI:https://doi.org/10.1002/cne.902730106· OSTI ID:6403877

Petrides, M; Pandya, D N

The projections to the frontal cortex that originate from the various areas of the superior temporal region of the rhesus monkey were investigated with the autoradiographic technique. The results demonstrated that the rostral part of the superior temporal gyrus (areas Pro, Ts1, and Ts2) projects to the proisocortical areas of the orbital and medial frontal cortex, as well as to the nearby orbital areas 13, 12, and 11, and to medial areas 9, 10, and 14. These fibers travel to the frontal lobe as part of the uncinate fascicle. The middle part of the superior temporal gyrus (areas Ts3 and paAlt) projects predominantly to the lateral frontal cortex (areas 12, upper 46, and 9) and to the dorsal aspect of the medial frontal lobe (areas 9 and 10). Only a small number of these fibers terminated within the orbitofrontal cortex. The temporofrontal fibers originating from the middle part of the superior temporal gyrus occupy the lower portion of the extreme capsule and lie just dorsal to the fibers of the uncinate fascicle. The posterior part of the superior temporal gyrus projects to the lateral frontal cortex (area 46, dorsal area 8, and the rostralmost part of dorsal area 6). Some of the fibers from the posterior superior temporal gyrus run initially through the extreme capsule and then cross the claustrum as they ascend to enter the external capsule before continuing their course to the frontal lobe. A larger group of fibers curves round the caudalmost Sylvian fissure and travels to the frontal cortex occupying a position just above and medial to the upper branch of the circular sulcus. This latter pathway constitutes a part of the classically described arcuate fasciculus.

• Research Organization: McGill Univ., Montreal (Canada)
• OSTI ID: 6403877
• Journal Information: J. Comp. Neurol.; (United States), Journal Name: J. Comp. Neurol.; (United States) Vol. 273:1; ISSN JCNEA
• Country of Publication: United States
• Language: English

Related Subjects

551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AMINO ACIDS
AUTORADIOGRAPHY
BIOLOGICAL PATHWAYS
BODY
BRAIN
CARBOXYLIC ACIDS
CENTRAL NERVOUS SYSTEM
CEREBRAL CORTEX
CEREBRUM
LABELLED COMPOUNDS
LEUCINE
MEDICINE
NERVES
NERVOUS SYSTEM
NEUROLOGY
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANS
TRITIUM COMPOUNDS