scholarly journals Cortical and thalamic connectivity of posterior parietal visual cortical areas PPc and PPr of the domestic ferret ( Mustela putorius furo )

2019 ◽  
Vol 527 (8) ◽  
pp. 1315-1332 ◽  
Author(s):  
Leigh‐Anne Dell ◽  
Giorgio M. Innocenti ◽  
Claus C. Hilgetag ◽  
Paul R. Manger
Keyword(s):  
Mustela Putorius ◽  
Cortical Areas ◽  
Posterior Parietal ◽  
Visual Cortical ◽  
Mustela Putorius Furo

scholarly journals Cortical and thalamic connectivity of temporal visual cortical areas 20a and 20b of the domestic ferret ( Mustela putorius furo )

2019 ◽  
Vol 527 (8) ◽  
pp. 1333-1347 ◽  
Author(s):  
Leigh‐Anne Dell ◽  
Giorgio M. Innocenti ◽  
Claus C. Hilgetag ◽  
Paul R. Manger
Keyword(s):  
Mustela Putorius ◽  
Cortical Areas ◽  
Visual Cortical ◽  
Mustela Putorius Furo

scholarly journals Cortical and thalamic connectivity of occipital visual cortical areas 17, 18, 19, and 21 of the domestic ferret ( Mustela putorius furo )

2019 ◽  
Vol 527 (8) ◽  
pp. 1293-1314 ◽  
Author(s):  
Leigh‐Anne Dell ◽  
Giorgio M. Innocenti ◽  
Claus C. Hilgetag ◽  
Paul R. Manger
Keyword(s):  
Mustela Putorius ◽  
Cortical Areas ◽  
Visual Cortical ◽  
Mustela Putorius Furo

scholarly journals Cortical and thalamic connectivity of occipital visual cortical areas 17, 18, 19 and 21 of the domestic ferret (Mustela putorius furo).

2018 ◽  
Author(s):  
Leigh-Anne Dell ◽  
Giorgio M Innocenti ◽  
Claus C Hilgetag ◽  
Paul R Manger
Keyword(s):  
Brain Connectivity ◽  
Dorsal Stream ◽  
Mustela Putorius ◽  
Cortical Connectivity ◽  
Ipsilateral Hemisphere ◽  
Dorsal Thalamus ◽  
Visual Thalamus ◽  
Cortical Areas ◽  
Visual Areas ◽  
Visual Cortical

The present study describes the ipsilateral and contralateral cortico-cortical and cortico-thalamic connectivity of the occipital visual areas 17,18, 19 and 21 in the ferret using standard anatomical tract-tracing methods. In line with previous studies of mammalian visual cortex connectivity, substantially more anterograde and retrograde label was present in the hemisphere ipsilateral to the injection site compared to the contralateral hemisphere. Ipsilateral reciprocal connectivity was the strongest within the occipital visual areas, while weaker connectivity strength was observed in the temporal, suprasylvian and parietal visual areas. Callosal connectivity tended to be strongest in the homotopic cortical areas, and revealed a similar areal distribution to that observed in the ipsilateral hemisphere, although often less widespread across cortical areas. Ipsilateral reciprocal connectivity was observed throughout the visual nuclei of the dorsal thalamus, with no contralateral connections to the visual thalamus being observed. The current study, along with previous studies of connectivity in the cat, identified the posteromedial lateral suprasylvian visual area (PMLS) as a distinct network hub external to the occipital visual areas in carnivores, implicating PMLS as a potential gateway to the parietal cortex for dorsal stream processing. These data will also contribute to the Ferretome (www.ferretome.org), a macro connectome database of the ferret brain, providing essential data for connectomics analyses and cross-species analyses of connectomes and brain connectivity matrices, as well as providing data relevant to additional studies of cortical connectivity across mammals and the evolution of cortical connectivity variation.

Location, architecture, and retinotopy of the anteromedial lateral suprasylvian visual area (AMLS) of the ferret (Mustela putorius)

2008 ◽  
Vol 25 (1) ◽  
pp. 27-37 ◽  
Author(s):  
PAUL R. MANGER ◽  
GERHARD ENGLER ◽  
CHRISTIAN K.E. MOLL ◽  
ANDREAS K. ENGEL
Keyword(s):  
Visual Area ◽  
Domestic Cat ◽  
Lower Visual Field ◽  
Mustela Putorius ◽  
Cortical Areas ◽  
Architectural Features ◽  
Visual Areas ◽  
Retinotopic Organization ◽  
Visual Cortical ◽  
Cortical Visual Areas

The present paper describes the results of architectural and electrophysiological mapping observations of the medial bank of the suprasylvian sulcus of the ferret immediately caudal to somatosensory regions. The aim was to determine if the ferret possessed a homologous cortical area to the anteromedial lateral suprasylvian visual area (AMLS) of the domestic cat. We studied the architectural features and visuotopic organization of a region that we now consider to be a homologue to the cat AMLS. This area showed a distinct architecture and retinotopic organization. The retinotopic map was complex in nature with a bias towards representation of the lower visual field. These features indicate that the region described here as AMLS in the ferret is indeed a direct homologue of the previously described cat AMLS and forms part of a hierarchy of cortical areas processing motion in the ferret visual cortex. With the results of the present study and those of earlier studies a total of twelve cortical visual areas have been determined presently for the ferret, all of which appear to have direct homologues with visual cortical areas in the cat (which has a total of eighteen areas).

scholarly journals Cortical and thalamic connectivity of posterior parietal visual cortical areas PPc and PPr of the domestic ferret (Mustela putorius furo).

2018 ◽  
Author(s):  
Leigh-Anne Dell ◽  
Giorgio M Innocenti ◽  
Claus C Hilgetag ◽  
Paul R Manger
Keyword(s):  
Parietal Cortex ◽  
Posterior Parietal Cortex ◽  
Mustela Putorius ◽  
Dorsal Thalamus ◽  
Area 7 ◽  
Model Animal ◽  
Visual Areas ◽  
Posterior Parietal ◽  
Visual Cortical ◽  
And Function

The present study describes the ipsilateral and contralateral cortico-cortical and cortico-thalamic connectivity of the parietal visual areas PPc and PPr in the ferret using standard anatomical tract-tracing methods. The two divisions of posterior parietal cortex of the ferret are strongly interconnected, however area PPc shows stronger connectivity with the occipital and suprasylvian visual cortex, while area PPr shows stronger connectivity with the somatomotor cortex, reflecting the functional specificity of these two areas. This pattern of connectivity is mirrored in the contralateral callosal connections. In addition, PPc and PPr are connected with the visual and somatomotor nuclei of the dorsal thalamus. Numerous connectional similarities exist between the posterior parietal cortex of the ferret (PPc and PPr) and the cat (area 7 and 5), indicative of the homology of these areas within the Carnivora. These findings highlight the existence of a fronto-parietal network as a shared feature of the organization of parietal cortex across Euarchontoglires and Laurasiatherians, with the degree of expression varying in relation to the expansion and areal complexity of the posterior parietal cortex. This observation indicates that the ferret is a potentially valuable experimental model animal for understanding the evolution and function of the posterior parietal cortex and the fronto-parietal network across mammals. The data generated will also contribute to the Ferretome (www.ferretome.org) connectomics databank, to further cross-species analyses of connectomes and illuminate wiring principles of cortical connectivity across mammals.

scholarly journals Cortical and thalamic connectivity of temporal visual cortical areas 20a and 20b of the domestic ferret (Mustela putorius furo).

2018 ◽  
Author(s):  
Leigh-Anne Dell ◽  
Giorgio M Innocenti ◽  
Claus C Hilgetag ◽  
Paul R Manger
Keyword(s):  
Posterior Parietal Cortex ◽  
Network Connectivity ◽  
Temporal Region ◽  
Mustela Putorius ◽  
Dorsal Thalamus ◽  
Visual Thalamus ◽  
Species Analysis ◽  
Visual Areas ◽  
Posterior Parietal ◽  
Visual Cortical

The present study describes the ipsilateral and contralateral cortico-cortical and cortico-thalamic connectivity of the temporal visual areas 20a and 20b in the ferret using standard anatomical tract-tracing methods. The two temporal visual areas are strongly interconnected, but area 20a is primarily connected to the occipital visual areas, whereas area 20b maintains more widespread connections with the occipital, parietal and suprasylvian visual areas and the secondary auditory cortex. The callosal connectivity, although homotopic, consists mainly of very weak anterograde labelling which was more widespread in area 20a than area 20b. Although areas 20a and 20b are well connected with the visual dorsal thalamus, the injection into area 20a resulted in more anterograde label, whereas more retrograde label was observed in the visual thalamus following the injection into area 20b. Most interestingly, comparisons to previous connectional studies of cat areas 20a and 20b reveal a common pattern of connectivity of the temporal visual cortex in carnivores, where the posterior parietal cortex and the central temporal region (PMLS) provide network points required for dorsal and ventral stream interaction enroute to integration in the prefrontal cortex. This pattern of network connectivity is not dissimilar to that observed in primates, which highlights the ferret as a useful animal model to understand visual sensory integration between the dorsal and ventral streams. This data will contribute to the Ferretome (www.ferretome.org) to facilitate cross species analysis of brain connectomes and wiring principles of the brain.

Coronaviren als Ursache einer systemischen granulomatösen Entzündung bei einem Frettchen (Mustela putorius furo)

2009 ◽  
Vol 37 (01) ◽  
pp. 40-44
Author(s):  
C. Maresch ◽  
A. Bracke ◽  
D. Bröker ◽  
A. Kirchhoff ◽  
J. P. Teifke
Keyword(s):  
Sich Eine ◽  
Mustela Putorius ◽  
Granulomatöse Entzündung ◽  
Mustela Putorius Furo

Zusammenfassung Gegenstand: Ein 3 Jahre altes weibliches Frettchen (Mustela putorius furo) wurde mit vergrößerten Kopflymphknoten bei ungestörtem Allgemeinbefinden vorgestellt. Im weiteren Verlauf kam es zu einer syste-mischen Schwellung der Körperlymphknoten und zu einer Vergrößerung der Milz bei zunehmender Verschlechterung des Allgemeinbefindens. Material und Methoden: Nach klinischer und ultrasonographischer Untersuchung wurden Feinnadelaspirate von Milz und Lymphknoten gewonnen und zytologisch untersucht. Die Milz und ein geschwollener Kniekehllymphknoten wurden entnommen und histopathologisch sowie immunhistologisch auf Gruppe-1-Coronavirusantigen untersucht. Ergebnisse: Zytopathologisch war eine reaktive Hyperplasie der vergrößerten Milz und des Lymphknotens nachweisbar. Histopathologisch fanden sich eine herdförmige pyogranulomatöse Splenitis sowie eine granulomatöse Lymphadenitis. Coronavirusantigen konnte in Makrophagen von Milz und Lymphknoten nachgewiesen werden. Schlussfolgerung: Als Ursache für die granulomatöse Entzündung wird die systemische Coronavirusinfektion der Frettchen (FSCV) angesehen, die vermutlich durch einen mit dem enteralen Coronavirus der Frettchen (FECV) eng verwandten Erreger hervorgerufen wird.

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