The lateral geniculate nucleus projects to the inferior temporal cortex in the macaque monkey

Hernández-González, Amalia; Cavada, Carmen; Reinoso‐Suárez, Fernando

doi:10.1097/00001756-199412000-00071

Cited by 33 publications

(18 citation statements)

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“…The primary visual area was classically considered the main target of LGN in primates (Hubel and Wiesel 1972), though there is currently considerable evidence of sparse connections from the LGN to extrastriate areas (Wong-Riley 1976;Benevento and Yoshida 1981;Yukie and Iwai 1981;Bullier and Kennedy 1983;Lysakowski et al 1988;Hernandez-Gonzalez et al 1994;Sincich et al 2004;Warner et al 2010;Lyon and Rabideau 2012). Present results are in line with this evidence, which may be important to explain the residual visual function that remains in cases of cortical blindness after striate cortex lesions (Schmid et al 2010;Yu et al 2013).…”

Section: Discussionsupporting

confidence: 84%

Thalamic projections to visual and visuomotor areas (V6 and V6A) in the Rostral Bank of the parieto-occipital sulcus of the Macaque

et al. 2015

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The medial posterior parietal cortex of the primate brain includes different functional areas, which have been defined based on the functional properties, cyto- and myeloarchitectural criteria, and cortico-cortical connections. Here, we describe the thalamic projections to two of these areas (V6 and V6A), based on 14 retrograde neuronal tracer injections in 11 hemispheres of 9 Macaca fascicularis. The injections were placed either by direct visualisation or using electrophysiological guidance, and the location of injection sites was determined post mortem based on cyto- and myeloarchitectural criteria. We found that the majority of the thalamic afferents to the visual area V6 originate in subdivisions of the lateral and inferior pulvinar nuclei, with weaker inputs originating from the central densocellular, paracentral, lateral posterior, lateral geniculate, ventral anterior and mediodorsal nuclei. In contrast, injections in both the dorsal and ventral parts of the visuomotor area V6A revealed strong inputs from the lateral posterior and medial pulvinar nuclei, as well as smaller inputs from the ventrolateral complex and from the central densocellular, paracentral, and mediodorsal nuclei. These projection patterns are in line with the functional properties of injected areas: "dorsal stream" extrastriate area V6 receives information from visuotopically organised subdivisions of the thalamus; whereas visuomotor area V6A, which is involved in the sensory guidance of arm movement, receives its primary afferents from thalamic nuclei that provide high-order somatic and visual input.

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Section: Discussionsupporting

confidence: 84%

Thalamic projections to visual and visuomotor areas (V6 and V6A) in the Rostral Bank of the parieto-occipital sulcus of the Macaque

et al. 2015

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“…Although the vast majority of LGN neurons in primates project to V1, a few have been shown to project to the secondary visual area (prestriate cortex, V2) (Bullier & Kennedy 1983), dorsolateral visual cortex (Lysakowski et al . 1988;Cowey & Stoerig 1989), the dorsomedial visual area (Beck & Kaas 1998), the MT (Fries 1981), and even inferior temporal cortex (Hernandez‐Gonzalez et al . 1994; however, see Sorenson & Rodman 1996).…”

Section: Discussionmentioning

confidence: 99%

Do superior colliculus projection zones in the inferior pulvinar project to MT in primates?

Stepniewska

Kaas

1999

Eur J of Neuroscience

151

147

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In order to determine the relationship of superior colliculus inputs to thalamic neurons projecting to the middle temporal visual area (MT), injections of wheat germ agglutinin conjugated with horseradish peroxidase were placed in the superior colliculus of three owl monkeys, with injections of Fast Blue in the MT. The locations of labelled terminals and neurons in the posterior thalamus were related to four architectonically distinct nuclei of the inferior pulvinar (Stepniewska & Kaas, Vis. Neurosci. 14, pp.1043-1060, 1997). Fast Blue injections in the MT labelled neurons largely in the medial nucleus of the inferior pulvinar. A few labelled neurons were found in the adjoining central medial nucleus of the inferior pulvinar, as well as in the lateral pulvinar and the dorsal lateral geniculate nucleus. Superior colliculus inputs were most dense in the posterior and medial nuclei of the inferior pulvinar. There were sparser inputs to the central lateral nucleus of the inferior pulvinar, locations in the lateral and medial pulvinar, and the dorsal lateral geniculate nucleus. The results indicate that the medial nucleus of the inferior pulvinar, the major projection zone to the MT, does not receive a significant input from the superior colliculus.

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“…However, it is not yet certain how many extrastriate areas receive LGN projections or whether this extrastriate projection pattern is species variable. In macaque monkeys, LGN neurons have been shown to project to V2 (Bullier and Kennedy, 1983;Stepniewska and Kaas, 1995), V4 (Lysakowski et al, 1988;Cowey and Stoerig, 1989), and even inferotemporal cortex (Hernandez-Gonzalez et al, 1994). These projecting neurons are always few in number, and they vary in laminar location.…”

Section: Discussionmentioning

confidence: 99%

Thalamic connections of the dorsomedial visual area in primates

Beck

Kaas

1998

J. Comp. Neurol.

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The dorsomedial visual area (DM) of owl monkeys is a cortical area that has been described recently in a range of primate species. To study the thalamic connections of this area, injections of several distinguishable neuroanatomical tracers were placed into DM in galagos, owl monkeys, squirrel monkeys, and macaque monkeys. The distribution of label was remarkably consistent across these diverse primate species. Labeled connections were densest within the pulvinar complex. Both the lateral and inferior divisions of the pulvinar, but not the medial division, had connections with DM. Within the inferior pulvinar of monkeys, central lateral and central medial nuclei had dense connections, and the medial and posterior nuclei had sparse connections with DM. Sparser connections were revealed in the lateral geniculate nucleus and the nucleus limitans. Anterograde label was also found in the superior colliculus. The consistencies in the pattern of subcortical projections across prosimian primates, New World monkeys, and Old World monkeys support the concept that DM is a visual area common to all primates. In addition, these results provide further evidence for proposed subdivisions of the inferior pulvinar.

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The lateral geniculate nucleus projects to the inferior temporal cortex in the macaque monkey

Cited by 33 publications

References 0 publications

Thalamic projections to visual and visuomotor areas (V6 and V6A) in the Rostral Bank of the parieto-occipital sulcus of the Macaque

Thalamic projections to visual and visuomotor areas (V6 and V6A) in the Rostral Bank of the parieto-occipital sulcus of the Macaque

Do superior colliculus projection zones in the inferior pulvinar project to MT in primates?

Thalamic connections of the dorsomedial visual area in primates

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