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Golgi tendon organ
Videos
The Golgi tendon organ is a skeletal muscle stretch receptor proprioceptor. It is situated at the interface between a muscle and its tendon known as the musculotendinous junction. It senses muscle ten
Mammalian tendon organ showing typical position in a muscle (left), neuronal connections in spinal cord (middle) and expanded schematic (right). The t
Mammalian tendon organ showing typical position in a muscle (left), neuronal connections in spinal cord (middle) and expanded schematic (right). The tendon organ is a stretch receptor that signals the force developed by the muscle. The sensory endings of the Ib afferent are entwined amongst the musculotendinous strands of 10-20 extrafusal muscle fibers. See an animated version.
Muscle spindle
Videos
Muscle spindles are stretch receptors within the body of a skeletal muscle that primarily detect changes in the length of the muscle. They convey length information to the central nervous system via a
Golgi tendon organ
…proprioceptor. It is situated at the interface between a muscle and its tendon known as the musculotendinous junction. It senses muscle tension (whereas muscle spindles are responsible for detecting muscle length and changes in muscle length). It is innervated by type Ib sensory nerve fibers. It represents the sensory…
Mammalian muscle spindle showing typical position in a muscle (left), neuronal connections in spinal cord (middle) and expanded schematic (right). The
Mammalian muscle spindle showing 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 fibres. 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 fibres. Gamma motor neurons activate the intrafusal muscle fibres, changing the resting firing rate and stretch-sensitivity of the afferents.
Light microscope photograph of a muscle spindle with H&E stain
Light microscope photograph of a muscle spindle with H&E stain
schematic of fusimotor action
schematic of fusimotor action