Abstract:
:Five complete poles of long nuclear chain intrafusal fibers of cat tenuissimus muscle spindles embedded in a plastic medium were cut in serial, 1 micron thick transverse sections and stained with toluidine blue. Each fiber pole displayed one plate-type motor ending positioned outside the encapsulated part of the spindle. Ultrastructurally, the endings resembled extrafusal end-plates and were more complex, in terms of prominence of sole-plate and degree of post-junctional folding, than any other motor ending present in the spindles. They were identified as the terminals of static (fast) skeletofusimotor axons, which preferentially innervate the longest nuclear chain fibers of cat spindles.
journal_name
Brain Resjournal_title
Brain researchauthors
Kucera J,Hughes Rdoi
10.1016/0006-8993(83)91024-7subject
Has Abstractpub_date
1983-03-07 00:00:00pages
309-13issue
2eissn
0006-8993issn
1872-6240pii
0006-8993(83)91024-7journal_volume
262pub_type
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