Clinical tuberculosis . Fig. 88^.. Fig. 8SB. Fig. SS.—Illustrating a common error in percussing the apices. A, proper position,showing percussion of the apices while the patients head is erect and tension removedfrom the sternocleidomastoideus and other neck muscles. B, wrong position, percussingsame when the head is turned and bent over toward the opposite side, thus putting thesternocleidomastoideus and other muscles on tension, thereby raising the pitch of thepercussion note and increasing the resistance to the percussion finger. PERCUSSION 41J same conditions as possible. The arms should b
Clinical tuberculosis . Fig. 88^.. Fig. 8SB. Fig. SS.—Illustrating a common error in percussing the apices. A, proper position,showing percussion of the apices while the patients head is erect and tension removedfrom the sternocleidomastoideus and other neck muscles. B, wrong position, percussingsame when the head is turned and bent over toward the opposite side, thus putting thesternocleidomastoideus and other muscles on tension, thereby raising the pitch of thepercussion note and increasing the resistance to the percussion finger. PERCUSSION 41J same conditions as possible. The arms should be in the sameposition. All muscles should he relaxed. The hc<id should bein the median position. A very common error is to percuss onesupraclavicular notch with the head erect and face forward andthe other with the face turned to one or the other side; or tryingto compare findings derived while the head is turned to oneside, as shown in Fig. 88, A and B. Turning the face to the op-posite side throws the muscles of the neck on
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