KNES 385 Lecture Notes - Lecture 16: Gamma Motor Neuron, Intrafusal Muscle Fiber, Alpha Motor Neuron
22 Oct 2016
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Somatosensation: all sensations pertaining to the soma (body: includes information about touch, pressure, temperature, pain and kinesthesia (proprioception, cutaneous sensation: sensation from the skin, proprioception: sensation from joints and muscles. Sensory information detected from one of the body is actually perceived by the opposite side of the brain. Topographic maps of information are maintained through out the nervous system. Ventral root: efferent nerves leaves spinal cord: inhibitory neuron decreases activity of the neuron it synapses will, efferent nerves exit the spinal cord via the ventral root cause muscle fibers to relax. Dorsal root: afferent nerves enter the spinal cord: afferent signal enters signal through dorsal root, afferent signal from body to cns. Pacinian, messner, merkel, ruffini and free endings: proprioception. Sensations from the musculoskeletal system (i. e. , muscles, tendons, joint capsules and ligaments) Proprioceptors are low threshold mechanoreceptors that inform the cns about movement and position by detecting the stretch of the tissue in which they lie.
