Publication Date:
1990-06-01
Description:
Conjugate eye movements are executed through the concurrent activation of several muscles in both eyes. The neural mechanisms that underlie such synergistic muscle activations have been a matter of considerable experimentation and debate. In order to investigate this issue, the projections of a class of primate premotoneuronal cells were studied, namely, the vertical medium-lead burst neurons (VMLBs), which drive vertical rapid eye movements. Axons of upward VMLBs ramify bilaterally within motoneuron pools that supply the superior rectus and inferior oblique muscles of both eyes. Axons of downward VMLBs ramify ipsilaterally in the inferior rectus portion of the oculomotor nucleus and in the trochlear nucleus. Thus, VMLBs can drive vertical motoneuron pools of both eyes during conjugate vertical rapid eye movements; these data support Hering's law.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moschovakis, A K -- Scudder, C A -- Highstein, S M -- EY-05433/EY/NEI NIH HHS/ -- EY-05954/EY/NEI NIH HHS/ -- NS-17763/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jun 1;248(4959):1118-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Neural Control, National Institute of Neurological Diseases and Stroke, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2343316" target="_blank"〉PubMed〈/a〉
Keywords:
Action Potentials
;
Animals
;
Axons/ultrastructure
;
Eye Movements/*physiology
;
*Models, Neurological
;
Motor Neurons/cytology/*physiology/ultrastructure
;
Neural Pathways/anatomy & histology/cytology
;
Oculomotor Muscles/*innervation
;
Saimiri
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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