Concept
Version 14
Created by Boundless
Classification of Receptors by Location
Muscle spindle
Mammalian muscle spindle showing typical position in a muscle (left), neuronal connections in spinal cord (middle), and an expanded schematic (right). The spindle is a stretch receptor with its own motor supply consisting of several intrafusal muscle fibers. The sensory endings of a primary (group Ia) afferent and a secondary (group II) afferent coil around the non-contractile central portions of the intrafusal fibers.
This is a drawing of a mammalian muscle spindle. It shows a typical position in a muscle (left), neuronal connections in spinal cord (middle), and expanded schematic (right). The spindle is a stretch receptor with its own motor supply consisting of several intrafusal muscle fibers. The sensory endings of a primary afferent and a secondary afferent coil around the non-contractile central portions of the intrafusal fibers.
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"Muscle spindle model."
http://en.wikipedia.org/wiki/File:Muscle_spindle_model.jpg
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