Author/Editor		Bošnjak, RF; Dolenc, VV; Sepe, A; Demšar, F
Title		Force, fatigue, and the cross-sectional area of wrist extensor muscles after radial nerve grafting
Type		članek
Source		Neurosurgery
Vol. and No.		Letnik 31, št. 6
Publication year		1992
Volume		str. 1035-42
Language		eng
Abstract		THE FORCE AND fatigue of the wrist extensor muscles during maximal voluntary and tetanic contractions were measured and compared in the injured and noninjured extremities of 11 patients with radial nerve gap injury and in 9 normal volunteers. The cross-sectional area (CSA) of the wrist extensor muscles was determined by magnetic resonance imaging and was correlated with force. In the patient group, an average of three (range, 2-4) sural nerve cable grafts, measuring 11.5 +- 5 cm (range, 5-20 cm) in length, were sutured to the nerve stumps at least 9 years before this study. Differences in the CSA values of the injured and noninjured arms were compared, and a ratio was established (CSAR). The mean CSAR was 82.9 per cent +- 14.3. These differences were not statistically significant (P greather th. 0.10, paired t-test). Despite very well-recovered muscular mass, the maximal voluntary contraction force was found to be incompletely recovered by up to 62.7 per cent +- 23, when compared with the noninjured side (P less th. 0.05, paired t-test). The fraction maximal voluntary contraction force/CSA had decreased by up to 76.4 per cent +- 25.5 (P less th. 0.05, paired t-test). An increased fatigability of the affected muscles persisted in all patients. The patients' noninjured extremity behaved in the same way as that of the dominant extremity of normal volunteers with regard to force, lever, and CSA values. In the best-recovered patients, the relation of the maximal voluntary outcome of the motor function after autografting of this nerve. (Neurosurgery 31:1035-1042,1992) contraction force between the noninjured and the injured side was the same (90 per cent +- 9.9) as that found between the dominant and the nondominant extremity of normal volunteers (P less th. 0.05, paired t-test).(trunc.)
Descriptors		ISOMETRIC CONTRACTION MICROSURGERY MUSCLE CONTRACTION MUSCLES POSTOPERATIVE COMPLICATIONS RADIAL NERVE SURAL NERVE WRIST ADOLESCENCE ADULT AGED BIOMECHANICS ELECTRIC STIMULATION FOLLOW-UP STUDIES HUMERAL FRACTURES MIDDLE AGE RADIAL NERVE SUPPORT, NON U.S. GOV'T SURAL NERVE