title: Nuclear envelope invaginations in hamster facial motor neurons during development and aging.
abstract: Morphometric measurements of nuclear envelope invaginations (NEI) in hamster facial motor neurons were made. These showed that the amount of NEI increased markedly between fetal life and birth to a high level that was maintained during the period of accelerated neuronal somal growth. Subsequently, the amount of NEI decreased to a plateau of low incidence that persisted through maturity and aging. This sequence of NEI formation and subsidence differs from that previously observed in a similar developing and aging series of pyramidal neurons in the same species. This may indicate, as discussed, that the presence of NEI reflects stage-specific functions that may differ depending on neuronal type.
mesh_terms: D000375:Aging; D000818:Animals; D006224:Cricetinae; D005154:Facial Nerve / Q000033:anatomy & histology*; D008647:Mesocricetus; D009046:Motor Neurons / Q000648:ultrastructure*; D009685:Nuclear Envelope / Q000648:ultrastructure*