In addition to common and accepted methods of eliciting the knee-jerk, including that described by Dr. Curran Pope,1 I have found two procedures useful in this connection. The one consists in supporting the leg to be examined on an inclined plane, while the patient is seated, the inclination being susceptible of variation in accordance with the requirements of the individual case. (Fig. 1.) By this means, relaxation of the lower extremity is secured independently of the volition of the patient, and the limb can be placed in a position most favorable for the development of the reflex. This device is particularly useful in the case of obese individuals and of those persons, old or young, who are either unable or unwilling to cooperate with the examiner, or who oppose or resist his efforts.
The second procedure consists in the application of the palmar surface of the index-finger of one
ESHNER AA. THE ELICITATION OF THE KNEE-JERK. JAMA. 1911;LVII(10):793. doi:10.1001/jama.1911.04260090015008
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