Early gerbil development was studied from days 4 through 12 of gestation. Implantation occurs on day 8 in a shallow antimesometrial implantation crypt. The proamniotic cavity forms from an invagination of basal trophoblast and a folding together of the rim of the cup thus produced. The approximation of this rim gives rise to the ectoplacental cone. The further development and expansion of the e...

gerbillus nanus is a highly polytypic species exhibiting considerable geographical variation, both in external and cranial characters. in the present study, specimens were collected from different localities in the northeastern, eastern, central and southern iran. the values for external end cranial measurements have been given. the specimens present the existence of two different morphotypes o...

Excised gerbil cochleae were cut along the mid-modiolar plane (hemicochlea). Along one-half turn of this preparation, fluorescent microbeads were placed on the basilar membrane (BM). The BM was vibrated with click stimuli (50 micros) produced mechanically by a piezo pusher. The stimulus delivery probe could be positioned either more apical or more basal from the beads. Vibration patterns were m...

Previous observations indicated that the lamellipodium ("leading edge") of fibroblasts contains a dense meshwork, as well as numerous bundles (microspikes) of actin filaments. Most, if not all, of the filaments have a uniform polarity, with the "barbed" end associated with the membrane. I investigated whether and how actin subunits exchange in this region by microinjecting living gerbil fibroma...

In the guinea pig and gerbil, individual components within the MLR time frame differ in optimal recording location. Specifically, MLR components obtained from the midline differ from those obtained over the temporal lobe. In the present paper midline and temporal lobe components were shown to differ not only in scalp topography but also in response to the following experimental manipulations: i...