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Ventral lateral geniculate nucleus afferents to the suprachiasmatic nucleus in the cat |
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| Authors: | Mingliang Pu Gary E. Pickard |
| Affiliation: | aDepartment of Neuroscience, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6141, USA;bDepartment of Psychiatry, School of Medicine, University of Pennsylvania, 415 Curie Blvd., Philadelphia, PA 19104-6141, USA;cThe Center for Sleep and Respiratory Neurobiology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6141, USA |
| Abstract: | The lateral geniculate complex innervates the hypothalamic suprachiasmatic nucleus (SCN). The location of neurons in the cat ventral lateral geniculate nucleus (vLGN) that give rise to the geniculohypothalamic tract has not been described. In this study, retrogradely labeled neurons were noted throughout the rostrocaudal extent of the medial vLGN following tracer injection into the SCN region. In addition, neuropeptide Y immunoreactive processes were also observed in the vLGN in this same medial zone and in the SCN. The data suggest that the medial zone of the cat vLGN may be homologous to the rodent intergeniculate leaflet (IGL). |
| Keywords: | Lateral geniculate nucleus Intergeniculate leaflet Geniculohypothalamic tract Suprachiasmatic nucleus Circadian rhythm Neuropeptide Y Cat |
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