Ciba Foundation Symposium 132 - Motor Areas of the Cerebral

Contains the court cases of a symposium held on the Ciba origin, London, February 1987. Addresses major concerns and new ideas within the learn of motor components of the cerebral cortex in people and animals. reports the historic improvement of the learn of cortical constitution and serve as, examines anatomical connections of motor components, and surveys physiological stories of cortical parts in wide awake primates. additionally considers the results of cortical lesions, and discusses scientific and experimental effects on issues of motor regulate.

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Ciba Foundation Symposium 132 - Motor Areas of the Cerebral Cortex

Contains the court cases of a symposium held on the Ciba starting place, London, February 1987. Addresses major concerns and new suggestions within the learn of motor parts of the cerebral cortex in people and animals. studies the ancient improvement of the learn of cortical constitution and serve as, examines anatomical connections of motor parts, and surveys physiological stories of cortical parts in wide awake primates.

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Certainly we have not been able to demonstrate a connection in these single-cell preparations. One possibility is that a direct input from the thalamus conveys group I muscle afferents to area 4. I don’t like this idea because our work indicates that the anterior part of the ventral posterior nucleus in which those afferents terminate projects solely to area 3a. Something may come up through the spinothalamic tract, but I don’t like this idea either. My last resort is that something is projecting back from area 3a into areas 1 and 2, and these are known to project to area 4.

E. the VLo nucleus. Some of our SMA injections, however, also labelled thalamic nuclei previously shown to receive cerebellar nuclear inputs. 1. Schematic representation of thalarnic inputs to the SMA (based on Wiesendanger & Wiesendanger 1985a, b). In addition, the SMA also receives thalarnic afferents from the caudal portion of the ventrolateral nucleus (VLc) and from area X. These two latter thalarnic nuclei relay signals from the cerebellar dentate nucleus (D) to the SMA. SMA labelled a thalamic slab occupying some of both VLc and area X (this labelled area was medial to the one labelled after postarcuate injections and lateral to that labelled after mesial prefrontal cortex injections).

Assuming that there is likely to be a body representation in the deep cerebellar nuclei, although evidence for this is sketchy, such a representation would therefore be projected onto the VLp nucleus. The nature of the map has been variously interpreted (Asamuma et a1 1983a, Schell & Strick 1984); it is not clear whether it is single or multiple. Selective labelling of the various inputs to VLp reveals a finer organization in VLp (Asanuma et a1 1983b). Each deep cerebellar nucleus projects as a series of disjunctive focal groupings of axon terminations within the VLp nucleus (Fig.

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