Muscle Spindle and Comparison of Fish Muscle Spindle with Other Vertebrates

Abstract

The aim of this study is to bring together the literature knowledge on muscule spindels that has been made up to until now and compare fish muscule spindels with other vertebrates. Muscle spindles are stretch receptor of skeletal muscles which detect the rate and degree of muscle length. According to the available literature, this review is considered as a one in making a comparison of fish muscle spindle and other vertebrates. Fish muscle spindle possesses single intrafusal muscle fiber similar to snake and lizard muscle spindle and have a double capsule similar in all vertebrates have studied. No significant differences in the length and diameter of intrafusal muscle fibers by comparison of muscle size. In fish and other vertebrates muscle spindles are supplied with one sensory ending (exception in mammalian may, in addition, be supplied with one or more secondary sensory endings) and receive its motor innervation from branches of axons that also innervate extrafusal muscle fibers. No investigation has been done about motor innervation of fish muscle spindle.

Lectin binding to pectoral fin of neonate little skates reared under ambient and projected‐end‐of‐century temperature regimes

“…Muscle spindles have not been studied extensively in fishes, and the role of glycosylation in muscle spindles has not been investigated (Adem & Elp, 2017; Maeda et al, 1983). Spindles are important for sensing a muscle organ's stretch and contractile activity (Adem & Elp, 2017). They possess specialized gamma neurons and intrafusal muscle fibers protected in a sheath of connective tissue (Adem & Elp, 2017; Kiehn, 2016; Kröger & Watkins, 2021).…”

“…Spindles are important for sensing a muscle organ's stretch and contractile activity (Adem & Elp, 2017). They possess specialized gamma neurons and intrafusal muscle fibers protected in a sheath of connective tissue (Adem & Elp, 2017; Kiehn, 2016; Kröger & Watkins, 2021). Motor neurons in cockroach leg muscles and embryonic mouse spinal cords have also been found to possess high galactose and N ‐acetylgalactosamine residues, but the exact function of this glycosylation is to be determined (Denburg et al, 1983; Fazel et al, 2003).…”

“…Muscle spindle membranes and surfaces were glycosylated with fucose, N ‐acetylglucosamine, mannose, and galactose in the present study. Muscle spindles have not been studied extensively in fishes, and the role of glycosylation in muscle spindles has not been investigated (Adem & Elp, 2017; Maeda et al, 1983). Spindles are important for sensing a muscle organ's stretch and contractile activity (Adem & Elp, 2017).…”

“…Slides were mounted with 1:9 Tris‐glycerin, coverslipped, and dried for a few hours or overnight at 4°C in the dark (Priester et al, 2011). To validate and distinguish between microstructures, such as large blood vessels and muscle spindles, micrographs (Supporting Information S1: Material ) were compared to histochemical and fluorescent micrographs from other fishes (Adem & Elp, 2017; Gabler‐Smith et al, 2022; Priester, 2012b; Maeda et al, 1983).…”