NEUR 3200 Lecture Notes - Lecture 17: Cardiac Muscle, Muscle Spindle, Alpha Motor Neuron
17 Dec 2017
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* reading assignment 3 will be due dec 4th at midnight. It will be reviewed on the 5th. Local circuit neurons have major inputs to lower motor neurons. Receive sensory input and descending input from higher centers. Most synapse with local circuit neurons in brainstem and spinal cord. A few project directly to motor neurons. Orien8ng the eyes, head and body in response to sensory input. Prepare upper motor neurons for ini8a8on of movements. No direct output to motor neurons or local circuit interneurons. Detects and corrects di erences between intended movement and actual movement. Correc8on can be in real 8me, or form the basis of long-term improvement. Helps bones move rela8ve to each other. Soma%c motor system - made up of skeletal muscles. Contrac9ng muscles - force is always in one direc8on. Distal muscles = outer limbs, ner motor movements. Spinal nerve contains both sensory and motor info. Alpha motor neurons = force producing (direct)
