The effect of dark-rearing on dendritic development in two regions of the forebrain of the domestic chick.
The effects of dark-rearing on dendritic development were studied in domestic chicks aged 72 h. Two areas of the forebrain were investigated, the hyperstriatum accessorium (HA) and the intermediate part of the medial hyperstriatum ventrale (IMHV). Dark-rearing significantly reduced spine density on the dendrites of large multipolar neurones in both left and right HA. In the IMHV there was a significant decrease in spine density in the left hemisphere in chicks reared in the light. No other parameters of dendritic development were affected. These results reinforce the conclusion that in the young domestic chick the left IMHV is a particularly labile region.
Galal
K M
KM
Department of Anatomy, College of Medicine, University of Juba (Sudan).
Bradley
P M
PM
Drummond
P
P
D000818:Animals; D002645:Chickens / Q000254:growth & development* / Q000502:physiology; D003624:Darkness; D003712:Dendrites / Q000502:physiology* / Q000648:ultrastructure; D005625:Frontal Lobe / Q000254:growth & development* / Q000502:physiology / Q000648:ultrastructure; D012683:Sensory Deprivation / Q000502:physiology*; D014795:Visual Pathways / Q000254:growth & development* / Q000502:physiology