Cited by 371Functional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and ApplicationsNeural dynamics and brain function

The Connectional Organization of the Cortico-thalamic System of the Cat

Scannell, J.W.·1999·Cerebral Cortex

Abstract

Data on connections between the areas of the cerebral cortex and nuclei of the thalamus are too complicated to analyse with naked intuition. Indeed, the complexity of connection data is one of the major challenges facing neuroanatomy. Recently, systematic methods have been developed and applied to the analysis of the connectivity in the cerebral cortex. These approaches have shed light on the gross organization of the cortical network, have made it possible to test systematically theories of cortical organization, and have guided new electrophysiological studies. This paper extends the approach to investigate the organization of the entire cortico-thalamic network. An extensive collation of connection tracing studies revealed approximately 1500 extrinsic connections between the cortical areas and thalamic nuclei of the cat cerebral hemisphere. Around 850 connections linked 53 cortical areas with each other, and around 650 connections linked the cortical areas with 42 thalamic nuclei. Non-metric multidimensional scaling, optimal set analysis and non-parametric cluster analysis were used to study global connectivity and the 'place' of individual structures within the overall scheme. Thalamic nuclei and cortical areas were in intimate connectional association. Connectivity defined four major thalamo-cortical systems. These included three broadly hierarchical sensory or sensory/motor systems (visual and auditory systems and a single system containing both somatosensory and motor structures). The highest stations of these sensory/motor systems were associated with a fourth processing system composed of prefrontal, cingulate, insular and parahippocampal cortex and associated thalamic nuclei (the 'fronto-limbic system'). The association between fronto-limbic and somato-motor systems was particularly close.

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Crossref · 10.1093/cercor/9.3.277

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  • The specific observations from our data are mostly consistent (with a few additions) with extensive previous studies in rats and fewer studies in mice as well as with studies in other mammalian species.

    “The specific observations from our data are mostly consistent (with a few additions) with extensive previous studies in rats and the fewer number of studies in mice (Extended Data Fig. 10) as well as with studies in other mammalian species37–39, providing a comprehensive and unifying view of mouse cortico-thalamic connections for the first time.”

    From A mesoscale connectome of the mouse brain (2014) · cites this paper as [39]

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Authors
Scannell, J. W.
Affiliations
Newcastle University (GB)
Corresponding author
Scannell, J.W.
Venue
Cerebral Cortex
Published
1999-04-01
Volume
9
Issue
3
Pages
277-299
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2129057035
Cited by
371
References
182
Citations by year
2026: 2 · 2025: 7 · 2024: 7 · 2023: 12 · 2022: 11 · 2021: 10 · 2020: 13 · 2019: 17 · 2018: 8 · 2017: 7 · 2016: 11 · 2015: 20 · 2014: 22 · 2013: 18 · 2012: 19
FWCI
4.60
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
thalamic nuclei, cats, cortical connectivity, sensorimotor system, visual system, auditory system, somatosensory system, motor system, prefrontal cortex, cingulate cortex, insula, parahippocampal cortex
MeSH terms
Animals, Auditory Pathways, Brain Mapping, Cats, Cerebral Cortex, Limbic System, Nerve Net, Thalamic Nuclei, Visual Pathways, Cluster Analysis

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