Ablations of Areas 3b (SI Proper) and 3a of Somatosensory Cortex in Marmosets Deactivate the Second and Parietal Ventral Somatosensory Areas
- 1 January 1990
- journal article
- research article
- Published by Taylor & Francis in Somatosensory & Motor Research
- Vol. 7 (2) , 125-135
- https://doi.org/10.3109/08990229009144703
Abstract
Partial ablations of specific parts of cortical areas 3b (SI proper) and 3a in marmosets were found to render somatotopically equivalent parts of two other cortical somatosensory fields, the second somatosensory area (SII) and the parietal ventral area (PV), unresponsive to peripheral stimulation. Microelectrode recordings in anesthetized marmosets first established the responsiveness and locations of the representations of body parts, including the hand in areas 3a and 3b, SII, and in some cases PV. The hand representations in areas 3a and 3b were then removed by aspiration. Immediately afterwards, additional recordings established that regions of SII and PV that formerly represented the hand were no longer responsive to cutaneous stimulation of the hand (or any other skin surface). Other parts of these fields, representing parts of the body other than the hand, remained responsive to stimulation of the previously effective receptive fields. We conclude that SII and PV depend on inputs (either direct or indirect) from areas 3a and 3b for their activation.This publication has 30 references indexed in Scilit:
- Somatotopic organization of the lateral sulcus of owl monkeys: Area 3b, s‐II, and a ventral somatosensory areaJournal of Comparative Neurology, 1989
- Somatotopic organization of the second somatosensory cortical area after lesions of the primary somatosensory area in infant and adult catsBrain Research, 1988
- Responses in the First or Second Somatosensory Cortical Area in Cats during Transient Inactivation of the Other Ipsilateral Area with Lidocaine HydrochlorideSomatosensory Research, 1987
- Somatotopic Organization of the Third Somatosensory Area (SIII) in CatsSomatosensory Research, 1987
- Thalamic connectivity of the second somatosensory area and neighboring somatosensory fields of the lateral sulcus of the macaqueJournal of Comparative Neurology, 1986
- Cortical connections of the somatosensory fields of the lateral sulcus of macaques: Evidence for a corticolimbic pathway for touchJournal of Comparative Neurology, 1986
- Studies on the evolution of multiple somatosensory representations in primates: The organization of anterior parietal cortex in the new world callitrichid, SaguinusJournal of Comparative Neurology, 1986
- Regional segregation of neurons responding to quickly adapting, slowly adapting, deep and pacinian receptors within thalamic ventroposterior lateral and ventroposterior inferior nuclei in the squirrel monkey (Saimiri sciureus)Neuroscience, 1981
- Commissural columns in the sensory‐motor cortex of monkeysJournal of Comparative Neurology, 1979
- Silver Staining of Myelin by Means of Physical DevelopmentNeurological Research, 1979