PSY 250 Lecture Notes - Lecture 9: Golgi Tendon Organ, Tendon Reflex, Renshaw Cell
22 Mar 2016
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Motor unit: a single motor neuron and the muscles it innervates: muscles: skeletal muscles. If two sets of muscles cause opposite movements, they are said to be antagonisic. If two muscles contract and cause the same movement, they are synergisic. Skeletal muscles: made up of myocytes (made up of muscle cells) All of the motor units controlling the same muscle is a motor pool. Movement precision is based on innervaion raio- motor neuron(axon) to muscle ibers. Motor neuron connects to the motor end plate of the muscle iber. Ap in motor neuron released ach- causes muscles to contract. Propriocepion: regulaion of muscle contracion requires proprioceptors. These somatosensory receptors transmit informaion regarding the posiion or movement of a body part. Has its own intrafusal muscle, which is innervated by its own intrafusal motor neuron. The role of the intrafusal motor neurons is to maintain muscle tension, extrafusal muscle. keeping it responsive to even slight changes in length of the.
