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A Novel Method For Analysis Of Proprioceptor Sensory Neuron Subtypes In The Mouse Dorsal Root Ganglia, Delaney C. Grant
A Novel Method For Analysis Of Proprioceptor Sensory Neuron Subtypes In The Mouse Dorsal Root Ganglia, Delaney C. Grant
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Proprioceptive sensory neurons encode critical mechanosensory information that helps determine how the body interacts with the outside world and monitors the proper execution of motor movements. Housed in skeletal muscles lie specialized mechanoreceptors that are critical to this feedback loop: muscle spindles supplied by group Ia & group II afferents, and Golgi tendon organs supplied by group Ib afferents relay information regarding changes in muscle force, length, and tension. All three afferent subtypes originate in the muscle and travel to the dorsal root ganglia, relaying information to the central nervous system. GTO and MS proprioceptive afferent subtypes have been identified, …
Investigating Anatomical And Molecular Aspects Of Proprioceptive Sensory Neuron Diversity Using A Transgenic Mouse Model, Martha Jean Sonner
Investigating Anatomical And Molecular Aspects Of Proprioceptive Sensory Neuron Diversity Using A Transgenic Mouse Model, Martha Jean Sonner
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Muscle spindles (MS) and Golgi tendon organs (GTOs) are encapsulated, stretch-activated sensory receptors housed within skeletal muscles, yet their functional contributions to proprioceptive monitoring of limb movements are quite different. For example, MS are responsible for detecting stretch of muscle fibers, and GTOs provide feedback regarding muscle tension during contraction. Peripheral axons extending from proprioceptive sensory neurons (PSNs) in the dorsal root ganglia supply MS and GTOs. MS are innervated by Group Ia and II sensory fiber endings, while GTOs are innervated by a single Group Ib sensory fiber. The developmental processes guiding axons from PSNs to their targets and …