Invasion of visual cortex by the auditory system in the naturally blind mole rat.
Previously we have shown that the dorsal lateral geniculate body (LGB), which is strictly visual in sighted mammals, receives a strong auditory input in the naturally blind mole rat (Spalax ehrenbergi). Here we show with the 2-deoxyglucose technique and with single-unit recordings that in this species the initially non-degenerated visual cortex, as defined by its connection with LGB, is also activated by the auditory modality. These findings suggest that cross-modal compensation may occur as a natural consequence of the degeneration of a sense organ.
Heil
P
P
Institute of Zoology, Technical University Darmstadt, Germany.
Bronchti
G
G
Wollberg
Z
Z
Scheich
H
H
D000818:Animals; D001306:Auditory Pathways / Q000502:physiology*; D001345:Autoradiography; D003847:Deoxyglucose; D005829:Geniculate Bodies / Q000502:physiology; D006735:Horseradish Peroxidase; D012377:Rodentia / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins
D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins; D003847:Deoxyglucose; D006735:Horseradish Peroxidase