Projections from the parietal cortex to the brain stem nuclei in the cat, with special reference to the parietal cerebro‐cerebellar system

Mizuno, Noboru; Mochizuki, Kaori; Matsushima, Chihiro Akimoto Ryotaro; Sasaki, Kohsuke

doi:10.1002/cne.901470406

Cited by 67 publications

(16 citation statements)

References 32 publications

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“…When the first peak in F1 group is considered to be due to direct cortico-olivary activation, the single peak in P group or the first peak in F2 group is probably attributable to indirect cortico-olivary activation. Such an assumption may be relevant to the anatomical finding that there was found to be no significant projection from the parietal association cortex to the inferior olive (Mizuno et al, 1973). This assumption may be supported by the physiological finding that the climbing fibre responses in the cerebellar cortex to stimulation of the parietal association cortex appeared at latency of a few milliseconds longer (17-19 ms) than those to stimulation of the frontal motor cortex (Sasaki et al, 1975).…”

Section: Extracellular Unitary Activities In the Inferior Olive Evokementioning

confidence: 86%

The parieto-rubro-olivary pathway in the cat

Oka

Jinnai²,

Yamamoto

1979

Exp Brain Res

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Stimulation of the parietal association cortex as well as the frontal motor cortex elicited clearly extracellular unitary activities or field potentials in the ipsilateral inferior olive in the cat. The parietal-induced responses came out generally at a longer and more variable latency than the frontal-induced ones. This suggested the existence of an indirect pathway from the parietal association cortex to the inferior olive. The recording sites for the parietal-induced responses were located not only in the dorsal lamella but also in the ventral lamella of the principal olive and in the medial accessory olive. Such olivary sites were exclusively in the rostral half of the inferior olive, and these areas in the olive were considered to give projection fibres predominantly to the hemispherical parts of the cerebe-lar cortex (neocerebellum). Small neuronal cells were labelled with horseradish peroxidase (HRP) homolaterally in the midbrain tegmentum, after HRP was injected through recording glass microelectrodes into the inferior olive where only the parietal-induced responses were evidently recorded. These small cells were distributed in the rostral one-third of the red nucleus and/or around the adjacent midbrain reticular formation close to the lateral border of the red nucleus. In referring to recent anatomical and physiological data, such small neurones labelled with HRP could be identified as the parvocellular red nucleus neurones. The present results indicate the existence of the parieto-rubro-olivary pathway system in the cat and suggest, in association with our previous studies, that the parvocellular red nucleus neurones participate in control of highly co-ordinated posture and movement predominantly through the neocerebellum.

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Section: Extracellular Unitary Activities In the Inferior Olive Evokementioning

confidence: 86%

The parieto-rubro-olivary pathway in the cat

Oka

Jinnai²,

Yamamoto

1979

Exp Brain Res

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“…The present results extend their finding to the RN neurons which send their axons to the spinal cord. It has been shown that the lateral portion of PASC projects to the dorsomedial portion of the predominantly rostral part of RN, whereas the medial portion of PASC projects to the ventrolateral portion of the predominantly rostral part of RN (MABUCHI and KUSAMA, 1966;MIzuNo et al, 1973). Since C-cells are located in the dorsomedial portion and L-cells in the ventrolateral portion of RN (PADEL et al, 1972;POMPEIANO and BRODAL, 1957;ECCLES et al, 1975a, b), these observations agree with the present results that stimulation of the lateral part of PASC produced EPSPs predominantly in C-cells while stimulation of the medial part of PASC induced EPSPs predominantly in L-cells.…”

Section: Discussionmentioning

confidence: 99%

“…Anatomical observations have shown that there are other cortical inputs from the parietal association cortex and secondary sensory area (RINvIK, 1965;MABUCHI and KUSAMA, 1966;MIzuNo et al, 1973). Furthermore, CAJAL (1909-1911 described that lemniscal fibers project to the red nucleus, and recent anatomical investigations have shown that pretectal fibers terminate in the red nucleus (GRAYBIEL, 1974;ITOH, 1977).…”

Section: Pasc-inducedmentioning

confidence: 99%

Synaptic inputs of feline rubrospinal neurons from the parietal association cortex, pretectum and medial lemniscus, and their lesion-induced sprouting.

et al. 1983

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Asbtract 1. Synaptic inputs of rubrospinal (RN) neurons from the cerebral cortex, pretectal area (PRT), and medial lemniscus (ML) were investigated electrophysiologically in the cat. 2. Stimulation of the ipsilateral parietal association cortex (PASO) and secondary sensory area (S11) produced slow-rising about 3 msec rise time monosynaptic EPSPs which were, in some cases, followed by hyperpolarizations, similar to the sensorimotor cortex (SM)-induced PSPs previously observed. Stimulation of the contralateral cerebral cortex never produced detectable PSPs. 3. Topographical arrangement of PASC-rubral projection was found. Stimulation of the lateral part of PASC induced EPSPs predominantly in RN cells innervating the cervicothoracic spinal segments, while stimulation of the medial part of PASC produced EPSPs predominantly in RN cells innervating the lumbosacral cord. Furthermore, PASCinduced EPSPs were more frequently recorded at the rostral half of RN than at the caudal half. 4. Monosynaptic EPSPs and multisynaptic IPSPs were induced by stimulation of the ipsilateral PRT and ML. PRT-and ML-induced EPSPs had times-to-peak of 1.0+0.4 msec (mean ± S.D.) and 1.6±0.5 msec, respectively, which were intermediate to those of the cerebral peduncle (CP)-and nucleus interpositus of the cerebellum (IP)-induced EPSPs. Furthermore, sensitivity of amplitudes of PRT-induced EPSPs to membrane hyperpolarization was intermediate to those of CP-and IP-EPSPs, and that of ML-induced EPSPs was lower than that of IPEPSPs. Therefore, it is likely that synapses of PRT and ML fibers are formed between the distal dendrites where CP-rubral synapses

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“…The electrophysiological characterization of T-C projections as proposed [1][2][3]6] have been well supported by later morphological in vestigations [7][8][9][10][11].…”

Section: Thalamo-cortical Projection As Studied By Laminar Field Potementioning

confidence: 76%

Action of the Cerebello-Thalamo-Cortical Projection upon Visually Initiated Reaction-Time Hand Movements in the Monkey

Sasaki

Gemba²

1993

Stereotact Funct Neurosurg

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Electrophysiological characterization of thalamocortical projections and cerebello-thalamo-cortical pathways was shown by acute experiments in which laminar field potential analysis of responses evoked in the cortex by stimulation of tha-lamic and cerebellar nuclei was performed in anesthetized monkeys. Based on the results, dynamic activities of cerebro-cerebellar interconnections on voluntary movements were recorded with electrodes chronically implanted in various cortical areas in unanesthetized monkeys and were correlated with their behaviours. Cortical field potentials change in learning processes of visually initiated reaction-time hand movement and in compensating processes after cerebellar hemispherectomy.

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Projections from the parietal cortex to the brain stem nuclei in the cat, with special reference to the parietal cerebro‐cerebellar system

Cited by 67 publications

References 32 publications

The parieto-rubro-olivary pathway in the cat

The parieto-rubro-olivary pathway in the cat

Synaptic inputs of feline rubrospinal neurons from the parietal association cortex, pretectum and medial lemniscus, and their lesion-induced sprouting.

Action of the Cerebello-Thalamo-Cortical Projection upon Visually Initiated Reaction-Time Hand Movements in the Monkey

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