. Kig. 27. Method of supporting thigh and foot and of recording the swing of the lower leg in the knee-jerk experiment. A, support under thigh; B, pulley; C, cross shape<l writing needle; D, rubber band, twisted so as to keep point of ipe<l writing needle against drum; E, knee-jerk hammer to swing if it is free to move. The anterior horn cells taking part in this act are in the leg areas of the third and fourth lumbar segments of the cord. The response of these cells to the sensory stimulus from the extensor muscles, is either reenforced or inhibited by other impulses reaching the anteri
. Kig. 27. Method of supporting thigh and foot and of recording the swing of the lower leg in the knee-jerk experiment. A, support under thigh; B, pulley; C, cross shape<l writing needle; D, rubber band, twisted so as to keep point of ipe<l writing needle against drum; E, knee-jerk hammer to swing if it is free to move. The anterior horn cells taking part in this act are in the leg areas of the third and fourth lumbar segments of the cord. The response of these cells to the sensory stimulus from the extensor muscles, is either reenforced or inhibited by other impulses reaching the anterior horn cells a short time before the impulses from the leg. (2) The knee-ierk is the result of the direct mechanical stimulation of the muscle. The greater the tension the better the muscle responds to the blow on the tendon. The anterior horn cells are always during waking
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1
