. Kig. 26. Diagram of nervous patlis followed by the nerve impulses causing the knee-jerk and its reenforcemeuts. A, hammer placed to strike ligamentum patellse; B, quadriceps muscle; C, posterior spinal nerve root; D, motor cell in anterior horn of gray matter of lumbar cord; E, anterior spinal nerve root ;F, sensory nerve from other leg; G, comniisural cell; H, descending path from leg area in cerebral cautex; I, descemling path from arm area in cerebral cautcx; J, motor nerve to arm.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1