| Type | MGI:General | Description | the dendritic spine density of granule cells is reduced in the olfactory bulb mature spine density is the same as in wild-type mice at 3-4 months of age but is decreased in 6-7 and 9-10 month old mice immature spine density tends to decline at 3-4 and 6-7 months of age and is reduced at 9-10 months of age |
