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Journal of Productivity and Development
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El-Tarhonui, A., Saleh, S. (2010). GENERAL STRUCTURE AND INNERVATION OF SPINDLE MUSCLE OF THE DABB LIZARD, Uromastix acanthinura. Journal of Productivity and Development, 15(1), 27-36. doi: 10.21608/jpd.2010.42403
Amal El-Tarhonui; Soad Saleh. "GENERAL STRUCTURE AND INNERVATION OF SPINDLE MUSCLE OF THE DABB LIZARD, Uromastix acanthinura". Journal of Productivity and Development, 15, 1, 2010, 27-36. doi: 10.21608/jpd.2010.42403
El-Tarhonui, A., Saleh, S. (2010). 'GENERAL STRUCTURE AND INNERVATION OF SPINDLE MUSCLE OF THE DABB LIZARD, Uromastix acanthinura', Journal of Productivity and Development, 15(1), pp. 27-36. doi: 10.21608/jpd.2010.42403
El-Tarhonui, A., Saleh, S. GENERAL STRUCTURE AND INNERVATION OF SPINDLE MUSCLE OF THE DABB LIZARD, Uromastix acanthinura. Journal of Productivity and Development, 2010; 15(1): 27-36. doi: 10.21608/jpd.2010.42403

GENERAL STRUCTURE AND INNERVATION OF SPINDLE MUSCLE OF THE DABB LIZARD, Uromastix acanthinura

Article 2, Volume 15, Issue 1, January 2010, Page 27-36  XML PDF (753.75 K)
Document Type: Original Article
DOI: 10.21608/jpd.2010.42403
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Authors
Amal El-Tarhonui* ; Soad Saleh
Department of Zoology, Faculty of Science, Garyounis University, Libya.
Abstract
The structure and innervation of spindle muscle in Uromastix acanthinura was studied. The skeletal muscles were stained with silver impregnation, dissociated and mounted in glycerin. The spindles were completely isolated from the extrafusal muscle fibers. It was found that in the lizard the spindles had only a single intrafusal fiber, they were of two types:
1-A long capsule with a long indistinct closely fitted capsule surrounding the muscle fiber and afferent nerve endings.
2-A short capsule spindle with a broad prominent capsule that extended for a short distance along the intrafusal muscle fiber.
In long spindles the sensory ending entered the capsule and branched at the point of entrance and then ran for a distance on the top of  intrafusal fiber.
In short spindles, the sensory ending entered the capsule and then branched into a number of fine filaments each came in contact with the intrafusal fiber.
3-A complex spindles were observed and they were having two forms:
    a-Paired linkage where spindles lay side by side.
   b-Tandem spindle which contained two adjacent sensory regions.
4-The extrafusal muscle fibers were of two types:
 a-A granular extrafusal muscle fibers which were innervated by motor nerve fibers ending in end plates.
 b-Granular extrafusal muscle fibers which were innervated by motor nerve fibers ending in terminations of grape.
          
 
Keywords
Spindles muscle; Iliotibialis muscle; dabb lizard; Uromastix acanthinura
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