Abstract:
:Motoneurones innervating the retractor bulbi muscle in the cat have been identified by retrograde labelling with horseradish peroxidase, by intracellular recording and by intracellular staining with horseradish peroxidase. Their somata are found in an accessory abducens nucleus, analogous to that described in some other species, which consists of a narrow column of cells situated in the lateral tegmental reticular field, above the superior olive and medial to the facial nerve. The column of cells extends over approximately 1.5 mm from P 5.5 to P 7. The retractor bulbi motoneurones number from 80 to 120 and have large, elongated somata which give rise to five or six major dendrites. Their axons cross the reticular formation in a dorso-medial direction to pass through the principal abducens nucleus before turning to leave the brain stem in the 6th nerve. Antidromic latencies ranged from 0.4 to 0.7 ms. Some retractor bulbi motoneurones could also be activated antidromically by stimulation of the lateral rectus muscle nerve.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Grant K,Guéritaud JP,Horcholle-Bossavit G,Tyć-Dumont Sdoi
10.1007/BF00239148subject
Has Abstractpub_date
1979-02-15 00:00:00pages
541-50issue
3eissn
0014-4819issn
1432-1106journal_volume
34pub_type
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