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Author Stepniewska, Iwona ♦ Cerkevich, Christina M. ♦ Fang, Pei-Chun Y. ♦ Kaas, Jon H.
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Wiley
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Philosophy & psychology ♦ Psychology ♦ Natural sciences & mathematics ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human anatomy, cytology, histology ♦ Human physiology ♦ Incidence & prevention of disease ♦ Diseases ♦ Manufacture for specific uses ♦ Precision instruments & other devices
Subject Domain (in MeSH) Body Regions ♦ Nervous System ♦ Anatomy ♦ Eukaryota ♦ Organisms ♦ Investigative Techniques ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment ♦ Behavior and Behavior Mechanisms ♦ Psychological Phenomena and Processes ♦ Psychiatry and Psychology ♦ Physiological Phenomena ♦ Biological Sciences
Subject Keyword Discipline Neurology ♦ Cerebral Cortex ♦ Physiology ♦ Galago ♦ Parietal Lobe ♦ Animals ♦ Electric Stimulation ♦ Evoked Potentials, Motor ♦ Extremities ♦ Face ♦ Frontal Lobe ♦ Functional Laterality ♦ Motor Activity ♦ Motor Cortex ♦ Neural Pathways ♦ Visual Cortex ♦ Journal Article ♦ Research Support, N.i.h., Extramural
Abstract We studied cortical connections of functionally distinct movement zones of the posterior parietal cortex (PPC) in galagos identified by intracortical microstimulation with long stimulus trains ( approximately 500 msec). All these zones were in the anterior half of PPC, and each of them had a different pattern of connections with premotor (PM) and motor (M1) areas of the frontal lobe and with other areas of parietal and occipital cortex. The most rostral PPC zone has major connections with motor and visuomotor areas of frontal cortex as well as with somatosensory areas 3a and 1-2 and higher order somatosensory areas in the lateral sulcus. The dorsal part of anterior PPC region representing hand-to-mouth movements is connected mostly to the forelimb representation in PM, M1, 3a, 1-2, and somatosensory areas in the lateral sulcus and on the medial wall. The more posterior defensive and reaching zones have additional connections with nonprimary visual areas (V2, V3, DL, DM, MST). Ventral aggressive and defensive face zones have reciprocal connections with each other as well as connections with mostly face, but also forelimb representations of premotor areas and M1 as well as prefrontal cortex, FEF, and somatosensory areas in the lateral sulcus and areas on the medial surface of the hemisphere. Whereas the defensive face zone is additionally connected to nonprimary visual cortical areas, the aggressive face zone is not. These differences in connections are consistent with our functional parcellation of PPC based on intracortical long-train microstimulation, and they identify parts of cortical networks that mediate different motor behaviors.
Description Country affiliation: United States
Author Affiliation: Stepniewska I ( Department of Psychology, Vanderbilt University, Nashville, Tennessee 37203, USA. iwona.stepniewska@vanderbilt.edu)
ISSN 00219967
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-12-20
Publisher Place United States
e-ISSN 10969861
Journal Journal of Comparative Neurology
Volume Number 517
Issue Number 6


Source: WHO-Global Index Medicus