Accommodation Motor Neurons in the Foveate Teleost Paralabrax clathratus: Horseradish Peroxidase Labeling and Axonal Morphometry, with Comparisons to Other Ciliary Nerve Components

1988 ◽  
Vol 32 (1) ◽  
pp. 1-16 ◽  
Author(s):  
John C. Wathey
Keyword(s):  
Horseradish Peroxidase ◽  
Motor Neurons ◽  
Paralabrax Clathratus

Horseradish Peroxidase Studies in Animals with Neuromuscular Transpositions

1981 ◽  
Vol 90 (4) ◽  
pp. 396-397 ◽  
Author(s):  
G. David Neal ◽  
Dwight Sutton ◽  
Gregory Duncan ◽  
Charles W. Cummings
Keyword(s):  
Spinal Cord ◽  
Horseradish Peroxidase ◽  
Motor Neurons ◽  
Cervical Spinal Cord ◽  
Retrograde Transport ◽  
Laryngeal Nerve ◽  
Nucleus Ambiguus ◽  
Axonal Connections ◽  
Motor End Plate ◽  
Posterior Cricoarytenoid

Horseradish peroxidase (hrp) is used to trace axonal connections from the motor end-plate to the driving neuron. This technique has confirmed that the neurons activating the sternothyroid muscle are located in the cervical spinal cord, while those controlling the posterior cricoarytenoid (pca) are found in the nucleus ambiguus ipsilaterally. Eight rabbits underwent a sternothyroid ansa pedicle implantation to the pca at the time of sectioning the recurrent laryngeal nerve ipsilaterally. After two months, four of these animals received hrp injections into the previously implanted pca. Brainstem staining hrp did not reveal any retrograde transport to the motor neurons that were known to control the sternothyroid. Possible reasons for the failure of retrograde transport are discussed.

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