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  • 1
    Electronic Resource
    Electronic Resource
    Pattern of projection and physiological properties of cortico-cortical connections from the posterior bank of the ansate sulcus to the motor cortex, area 4γ, in the cat (1982)
    Springer
    Experimental brain research 48 (1982), S. 335-344 
    Details
    ISSN: 1432-1106
    Keywords: Cortico-cortical connections ; Area 4γ ; Cats ; Parietal cortex ; Ansate sulcus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The physiological properties of neurons lying along the posterior bank of the ansate sulcus and the projection of these neurons to area 4γ of the motor cortex of the cat were studied and the following results were obtained: (1) Short latency antidromic responses were recorded from neurons along the medial-lateral bank of the posterior ansate sulcus following intracortical microstimulation (ICMS) delivered to motor cortex, area 4γ. (2) The posterior ansate region projects topographically to the motor cortex. Neurons in the most medial part of the ansate region project to the medial part of 4γ, while neurons in the central and lateral parts of the ansate region project to the more lateral parts of area 4γ. (3) In 33 cases, receptive field information was available for both the antidromically activated ansate neuron and from neurons around the stimulating site in 4γ. In 58% of the cases, both cortical sites received afferent input from within the same part of the periphery. (4) Afferent input to the motor cortex was examined following combined ablations of the primary somatosensory cortex (SI) and third somatosensory cortex (SIII) including all of area 5. We conclude that the integrity of these cortical regions is not necessary for afferent input to reach the motor cortex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238609
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Physiological properties and pattern of projection of cortico-cortical connections from the anterior bank of the ansate sulcus to the motor cortex, area 4γ, in the cat (1982)
    Springer
    Experimental brain research 46 (1982), S. 403-412 
    Details
    ISSN: 1432-1106
    Keywords: Postsigmoid gyrus ; Area 4γ ; Motor cortex ; Ansate sulcus ; Cats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The physiological properties of neurons in the postsigmoid gyrus lying along the anterior bank of the ansate sulcus and the pattern of projection of these neurons to the motor cortex, area 4γ, were investigated in the cat and the following results were obtained. (1) Neurons lying along the anterior bank of the ansate sulcus receive somatotopically organized afferent input from the skin and deep structures on the contralateral side of the body. (2) Short latency antidromic responses were recorded from all regions along the bank of the sulcus following intra-cortical microstimulation (ICMS) of area 4γ. (3) The projection of neurons to area 4γ was topographically organized. Neurons in the lateral portions projected to more lateral parts of 4γ, whereas neurons in the medial region of the postsigmoid gyrus sent axons to the more medial regions of the motor cortex. (4) In 50 cases, receptive fields were recorded from both the antidromically identified postsigmoid gyrus neuron and from neurons around the activation site in area 4γ. In 62% of these instances, both cortical sites received afferent input from within the same part of the periphery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00238635
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Movement of facial muscles following intra-cortical microstimulation (ICMS) along the lateral branch of the posterior bank of the ansate sulcus, areas 5a and 5b, in the cat (1983)
    Springer
    Experimental brain research 50 (1983), S. 459-463 
    Details
    ISSN: 1432-1106
    Keywords: Parietal cortex ; Ansate sulcus ; Facial muscles ; ICMS ; Cats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The lateral branch of the posterior bank of the ansate sulcus within the parietal cortex, areas 5a and 5b, was mapped using intracortical microstimulation (ICMS). Motor effective sites for contraction of facial muscles were identified using ICMS currents of less than 30 μA. Of the 177 effective sites, 78% were activated with threshold currents of less than 20 μA, and of these, 33% responded to stimulus strengths of less than 10 μA. Since neurons in this portion of the ansate region send projections to the face region of motor cortex, area 4γ, the possibility existed that the motor effects might be mediated through area 4γ. To examine this possibility we ablated both the anterior sigmoid gyrus (ASG) and the second somatosensory cortex, SII, including area 2pri, a region shown to contain a low threshold motor component, and report that the motor effect recorded from the ansate region is independent of both the ASG and area 2pri.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00239213
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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