The position of the motor endplate during growth.
The preliminary results of a study of the position of motor endplates with respect to the length of the soleus and long palmar muscles in the 17-day-foetus and throughout postnatal growth in Wistar albino rats are presented. The position adopted by the plate at the time of its formation is retained throughout growth in both muscles, namely at the centre of the fibres in the soleus, and nearer the proximal head in the long palmar. A difference in AChE activity in the distal and proximal head of the long palmar was observed by autoradiography with 3H-DFP.
D000818:Animals; D002802:Cholinesterases / Q000378:metabolism; D005260:Female; D009045:Motor Endplate / Q000033:anatomy & histology / Q000254:growth & development*; D024510:Muscle Development; D009132:Muscles / Q000033:anatomy & histology; D009469:Neuromuscular Junction / Q000254:growth & development*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D014018:Tissue Distribution
D002802:Cholinesterases